Wireless Ultrasonic Fill-Level Sensor

Clean CAP Wireless Ultrasonic Fill-Level Sensor

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Do more with less, smarter, greener, and more efficiently than ever.
Reduce your waste collection costs by up to 50% with our smart IoT-based waste bin sensors and monitoring solution. It only requires three steps:
1. Read fill-level information
Clean CAP smart waste bin sensor is compatible with any type of container installation to monitor any type of subtance or waste in real-time.

2. Optimize collection routes
CCN's route optimization and predictive analytics provide insightful historical data to generate the best routes and estimate the time of containers becoming full.

3. Collect the garbage
With CCN, you can plan ahead how collections are implemented, targeting only the locations with full trash bins.

Clean CAP Wireless Ultrasonic Fill-Level Sensor Product features
1. Can be attached to any type of bin, container, or tank
Clean CAP fill-level sensor can be mounted on any type of bin, container, or tank. If the container is made of plastic, the device can be mounted by screwing. For steel containers, Clean CAP can be fixed to the container's lid using brackets.

2. Senses both solid and liquid materials
Clean CAP's ultrasonic sensor enables it to detect both solids (general waste, paper, glass, e-waste, textile, etc.) and liquids (oil, sludge, agriculture products, etc.). The range of distance can vary between 30 cm - 400 cm (4 m / 13 ft).

3. Communicates wirelessly with monitoring platform
Clean CAP sends real-time information to Clean City Networks monitoring and data-analytics platform through wireless data transmission using 2G/3G networks. The software enables our customers to optimize their waste collection operations through data-driven decision making.

4. Designed for extreme environments and durability
Clean CAP has been tested to push the limits of its operability in conjuction with its battery life. It is completely enclosed and protected against dust and water, has a battery life of up to 10 years, and can operate in temperatures from -30 C (-22 F) to 80 C (176 F).

Clean CAP Plus Wireless Ultrasonic Fill-Level Sensor Basic specifications

Power	3.6V high performance lithium battery
Size (H x W x L)	95mm x 96mm (3.74in. x 3.8in.)
Net weight	470g (1.04 lbs.)
Battery life	Up to 10 years

Digital Oxygen Flow Meters

MF5806 Series Digital Oxygen Flow Meters General description

 
MF5806 series oxygen flow meters are specially designed for hospital individual oxygen therapyapplications.  it provides precise measurement of instant oxygen intake rate and accumulatedoxygen dosage for the individual oxygen delivery system. the design provides low powerconsumption that make it possible for operation on battery when power is an concern. themeter can be directly connected to the central station via RS485 that can provide remotemonitoring and control which will reduce the risk of oxygen over dosing.   


MF5806 Series Digital Oxygen Flow Meters Features and Applications
- Plug-and-paly hospital oxygen deliver design for easy usage       
- Mass flow technology provide precise instant rate and accumulated dosage
- Historical data storage and retrieval
- Password protected access
- Instant rate and accumulated dosage alarm        
- Excellent repeatability and accuracy
- Low power design with stand-alone operation by battery

MF5806 Series Digital Oxygen Flow Meters Mechanical Dimensions



MF5806 Series Digital Oxygen Flow Meters Specifications
 


MF5806 Series Digital Oxygen Flow Meters Production selection
 

Why use an SO2 sensor?

Why use an SO2 sensor?

Sulfur Dioxide gas (SO2) is a toxic gas with a strong irritating smell. It is present at very low concentrations in the atmosphere and is naturally emitted during volcanic eruptions. Inhaling sulfur dioxide has been associated with respiratory disease and difficulty breathing. It is also a precursor to acid rain and atmospheric particulates. Sulfur dioxide gas can be an active component or a waste product of several different industrial processes.

Atmospheric Sulfur Dioxide

Fossil fuel combustion at power plants is the largest emission source of sulfur dioxide into the atmosphere. Other sources include extracting metal from ore and the burning of high sulfur containing fuels by ships, trains and machinery. Perimeter monitoring at industrial sites is common to measure the concentration of sulfur dioxide being emitted into the atmosphere. isweek offer both fixed and portable monitors with an SO2 sensor suitable for long term outdoor perimeter monitoring as well as shorter term human exposure studies.

Industrial Uses of Sulfur Dioxide

Sulfur dioxide is an intermediate component in the formation of sulfuric acid. Sulfuric acid is a very important commodity chemical used in several industrial processes including the removal of oxidation and rust from metal sheeting. Sulfur dioxide gas is also used directly in many industries. It acts as a preservative for dried fruits due to its antimicrobial properties and is used in wine making to protect the wine from spoilage. isweek can provide a range of instruments for industrial monitoring of sulfur dioxide.

isweek SO2-B4 Sulfur Dioxide Sensor SO2 Sensor 
Alphasense Sulfur Dioxide gas sensors operate using proven fuel cell technology.

Sensors are available in the following sizes:
A: 20mm diameter, the industry standard size for portable gas detectors
B: 32mm diameter package, the best choice for fixed site applications
D: miniature, with proven long-term performance. Sensors designed for the next generation of portable gas detectors.

The SO2 range provides OEMs with reliable sensors for use in a variety of applications. Strong signal levels combined with low zero current allows resolution below 1ppm and an operating range for safety applications up to 2,000ppm. The sensors are designed for use in both fixed site and portable instrumentation.

The SO2 sensors offer our electrolyte leak-free guarantee and reliable long-term detection performance. The leakproof housing is moulded with a colour coded top for ease of identification.

Things to Consider When Buying Carbon Monoxide Sensors

Things to Consider When Buying Carbon Monoxide Sensors

Before you buy, it’s good to break down exactly what to look for in a carbon monoxide Sensor. We’ll highlight several key factors that were part of our decision-making process to help you become a more informed consumer, but if you’d like to skip to the details on our recommended models, you can do that here.

What Are the Symptoms of Carbon Monoxide Poisoning?

Carbon Monoxide doesn’t have a smell or taste, so you might not know right away that you’re being poisoned, but your body will. If you have carbon monoxide poisoning, you may feel dizzy, become nauseous, throw up, develop a headache, get confused, or pass out. It’s often been said that the signs of CO poisoning might resemble the flu.
Every year, 400 Americans die from accidental carbon monoxide poisoning (from fuel burning, not fires), and 20,000 are admitted to the emergency room.1 If you become unconscious while carbon monoxide is filling your home, it can be life threatening. That's where carbon monoxide Sensors come into play. Once installed, they can alert you about high levels of carbon monoxide in your home, which will give you more time to get to safety.

Who Is Most Susceptible to CO Poisoning?

Everyone is susceptible to carbon monoxide poisoning. But, according to the Centers for Disease Control and Prevention (CDC), children, older adults, people who are physically ill, and pets are more likely to be affected by CO.2 The Mayo Clinic adds that unborn babies’ blood cells take in more CO than adult blood cells, which makes them more susceptible to poisoning.3 Older adults who experience high levels of CO could be more likely to incur brain damage.
When it comes down to it, a CO Sensor can help save your life and the lives of the people you love.

What to Do If You Suspect High Levels of Carbon Monoxide

If you or your family members experience carbon monoxide poisoning symptoms, quickly walk outside for fresh air and call 911. Even if you start to feel better, you can still have toxic levels of CO in your system and might require medical help. In this situation, it’s a good idea to have your whole family checked for poisoning, including your pets. Signs of carbon monoxide poisoning don’t always happen right away—it can happen over the period of days and possibly even weeks, depending on the levels of CO in your home.

What Is a Carbon Monoxide Sensor?

Carbon monoxide Sensors are a lot like smoke Sensors, but instead of looking for signs of fire, they detect levels of carbon monoxide. Depending on the brand, Sensors operate in one of three ways: with a biomimetic sensor, metal oxide semiconductor, or electrochemical sensor.
Biomimetic Sensors use gels that change color after absorbing a certain amount of carbon monoxide—and then a sensor sounds an alarm. Metal oxide semiconductors have silica chips that detect CO and send electrical signals to trigger an alarm. Electrochemical sensors are considered to be the best in the industry. They use electrodes in chemical solutions that sense changes in electrical currents when carbon monoxide is present, and they sound an alarm.
If you have a professionally monitored security system installed, it should come with a CO Sensor.

Where to Install Carbon Monoxide Sensors

The Consumer Product Safety Commission recommends putting a carbon monoxide Sensor outside every separate sleeping area in your home.4 You might also want to add a carbon monoxide Sensor in your kitchen and basement for added safety. Also, make sure you install Sensors close to bedrooms so alarms will wake you up if you're sleeping.
If you have an attached garage, you’ll want to place a CO Sensor by the entranceway. A vehicle that’s been left running in a closed space is a common cause for CO poisoning. In the grand scheme of things, it’s better to be overly cautious by placing CO Sensors in every room, floor, and hallway than suffering CO poisoning.

How to Maintain a Carbon Monoxide Sensor

Most carbon monoxide Sensors last an average of five years. Although the product’s lifetime will vary depending on your make and model, you can still get the most out of your Sensor by wiping it down weekly to keep it clean from dust and debris.
It’s also a good idea to test your CO Sensor monthly. Start by pressing the “test” button to ensure the siren works. If your Sensor is older, you can purchase a carbon monoxide test kit to ensure that it’s fully functional. If the Sensor doesn’t go off when you test it, it’s probably time to buy a new one.

How Liquid Level Sensors Work

Level sensors are used to monitor and regulate levels of a particular free-flowing substance within a contained space. These substances are usually liquid, however level sensors can also be used to monitor some solids such as powdered substances. Level sensors are widely used industrially. Cars use liquid level sensors to monitor a variety of liquids, including fuel, oil and occasionally also specialist fluids such as power steering fluid. They can also be found in industrial storage tanks, for slurries, and in household appliances such as coffee machines. Basic level sensors can be used to identify the point at which a liquid falls below a minimum or rises above a maximum level. Many sensors can detail the specific amount of liquid in a container relative to the minimum/maximum levels, to provide a continuous measurement of volume.
There are a number of different types of liquid level sensor used to detect the point level of a liquid. Some types use a magnetic float, which rise and fall with the liquid in the container. Once the liquid, and by extension, the magnet, reach a certain level, a reed magnetic switch is activated. Commonly, there is a switch towards the top and the bottom of the container, allowing detection of minimum and maximum levels of liquid. Many sensors also include a protective shield to protect the magnet from turbulence or interference from direct contact with the liquid.
Another common type of level sensor is known as a Conductive sensor. Only liquids which conduct electricity can be used in this sensor. This type of sensor includes a source of power, usually of a fairly low voltage. At least two electrodes are placed within the container. When a conductive liquid reaches a certain point, it will come into contact with both a longer and a shorter electrode, and thus complete a circuit and activate an internal switch.
Pneumatic sensors are also a fairly common occurrence with particularly hazardous liquids, or in systems where the use of electricity is not viable or possible. This is because the sensor itself does not come into direct contact with the liquid at all. The sensor detects the level of air between the liquid and the pneumatic sensor, then uses this to calculate the amount of liquid used to fill the remainder of the container. These types of sensors are also relatively cost-effective.
There are also other types of level sensors which offer continuous measurement of liquids. Magnetostrictive sensors are similar in design to regular magnetic float sensors, yet the magnet level is measured using a magnetostrictive wire, which will react when its magnetic field is interrupted by the presence of the magnet. The exact point at which this interruption occurs can be determined by the distance between the bottom of the wire and the point of interference. Alternatives to this design include a magnetoresistive sensor, whereby an additional magnet is inserted onto the arm of the float, allowing accurate triangulation of the exact position of the magnets. This type of sensor is commonly used in conjunction with computer programs due to its accuracy.
liquid level sensor Recommend

• 

  Liquid Level Sensor Replace Honeywell LLE Series - LLC101000

  Liquid Level Sensor ​LLC101000, Liquid level switches that can detect almost any liquid type; oil or water based.
  

• 

  Optomax Industrial Glass Series Liquid Level Switches - LLG810D3-003

  LLG810D3-003 Optomax Industrial Glass Series Liquid Level Switche that can detect almost any liquid type; oil or water based.
  

• 

  Optomax Industrial Glass Series Liquid Level Switches - LLG210D3-00x

  LLG210D-00x Optomax Industrial Glass Series Liquid Level Switches that can detect almost any liquid type; oil or water based.
  

• 

  Optomax Industrial Glass Series Liquid Level Switches - LLG210D3L24-00x

  LLG210D3L24-00x Optomax Industrial Glass Series Liquid Level Switches that can detect almost any liquid type; oil or water based.
  

LuminOx Fluorescence Optical Oxygen Sensor With Evaluation Interface Board

LuminOx Fluorescence Optical Oxygen Sensor (O2 Sensor) - LOX-02

LOX-02 LuminOx Fluorescence Optical Oxygen Sensor (O2 Sensor) description
The LuminOx Family is a range of factory calibrated optical sensors which measure ambient O2 levels using the principle of fluorescence quenching by oxygen.
Our unique patented process allows us to produce an oxygen sensor that benefits from low power, traditionally associated with electrochemical sensing devices, while providing a much longer lifetime due to the non-depleting sensing principle.
LuminOx unlike other sensor technologies is stable and robust, it is RoHS compliant as it does not contain lead or any other hazardous materials and has negligible cross sensitivity.
LuminOx can be purchased as a single optical sensor, or as part as an evaluation kit which includes the LuminOx Sensor Evaluation Interface Board, which was designed to allow customers to easily evaluate the sensor with minimum effort or design work. 


LOX-02 LuminOx Fluorescence Optical Oxygen Sensor (O2 Sensor) BENEFITS
• Low power
• Can also measure O 2 % & barometric pressure
• Suitable for battery power use
• Long life
• High accuracy
• Small & compact
• Low cost
• Maintenance free
• Contains no hazardous materials
• Connects directly to microcontroller without any additional circuitry.
• Factory Calibrated

LOX-02 LuminOx Fluorescence Optical Oxygen Sensor (O2 Sensor) APPLICATIONS
• Oxygen Detection
• Portable Equipment
• Breathing Apparatus
• Inerting
• Medical
• Lab Equipment
• Agriculture
• Incubation
• Fire Prevention
• Flue Gas in Condensing Boilers

LuminOx Optical Oxygen Sensor Evaluation Interface Board - LOX-EVB

LOX-EVB LuminOx Optical Oxygen Sensor Evaluation Interface Board GENERAL DESCRIPTION
The LuminOx Sensor family is a range of factory calibrated oxygen sensors which measure ambient ppO₂ levels using the principle of fluorescence quenching by oxygen.
The LuminOx Evaluation interface Board has been designed to allow customers to quickly and easily evaluate the sensor with the minimum of effort or design work
The LuminOx Evaluation Kit simultaneously provides three outputs;
• RS232 (serial interface voltage levels)
• RS485 (Modbus RTU) port allows multiple sensors to be addressed on a bus
• 0-5V Analogue output for basic measurements of oxygen only

LOX-EVB LuminOx Optical Oxygen Sensor Evaluation Interface Board BENEFITS
• Converts the LuminOx TTL level
• RS232 output into 3 standard industrial outputs
• Auto detects ppO2 or O2% variants of LuminOx Sensor.

LOX-EVB LuminOx Optical Oxygen Sensor Evaluation Interface Board APPLICATIONS 
• Oxygen Detection
• Portable Equipment
• Breathing Apparatus
• Inerting
• Medical
• Lab Equipment
• Agriculture
• Incubation
• Fire Prevention
• Flue Gas in Condensing Boilers

LOX-EVB LuminOx Evaluation Interface Board ELECTRICAL AND ENVIRONMENTAL SPECIFICATION

Supply Voltage (Vs)	4.75-5.25 Vdc
Supply Current (Is)	<50mA
Output Types	RS232, RS485 and 0-5V
Operating Temperature	0°C to +50°C
Storage Temperature	0°C to +60°C

LOX-EVB LuminOx Evaluation Interface Board PERFORMANCE SPECIFICATION

LuminOx Sensor Compatibilit	0-25% (O2 % version) 0-300mbar (ppO2 version)
Resolution	0.01% / 0.1mbar (Digital Outputs) 0.01V (0-5V Analogue Output)

LOX-EVB LuminOx Optical Oxygen Sensor Evaluation Interface Board MECHANICAL

Connection	9 Screw terminals
PCB Dimensions	75x55mm max

The LuminOx range has been designed as an alternative to electrochemical sensors but with the benefits of RoHS compliance, long life and complete environmental compensation built-in.

The sensor is available with and without a built-in barometric pressure sensor. LuminOx’s native measurement is partial oxygen p ressure (ppO2) in mbar. By incorporating a barometric pressure sensor, LuminOx is able to measure O2 vol. % in addition to ppO2

Unlike electrochemical sensors, LuminOx requires no additional signal conditioning circuitry and connects directly to the customers microcontroller via 3.3V-level RS232 link. This reduces costs and simplifies system design.

Rain Collector Sensor - Rainfall Sensor

Rain Collector Sensor Rainfall Sensor
This self-emptying, tipping bucket style rain collector utilizes an 8" diameter openning to meet NWS specifications for statistical accuracy. Rainfall is gathered in the collecting bucket and funnels through a small openning into a tipping mechanism. When the mechanism has 1/100th of an inch of water in it, it tips.  A count is then transmitted to an indicator and the water emptys from the tipping mechanism, through the bottom of the collector bucket to the outside.

Rain Collector Sensor Rainfall Sensor
Tipping bucket, self-emptying rain collector.  8" diameter openning meets NWS specifications for size and accuracy.
Dimensions: 8.63" O.D. x 7.88" Deep
Weight: 1.77 lbs.

The rainfall collector requires no manual emptying. Each tip of the bucket is equivalent to 1/100th of an inch of rain. It utilizes a normally open circuit that is momentarily closed each time it tips.  As such, it can be connected to any simple counting circuit, including Maximum's Rainwatch indicator.

Rain Collector Sensor Rainfall Sensor Features
Outside rainfall collector meets NWS specifications for size and accuracy, and is self-emptying for your convenience.
The collector bucket can remain outdoors year-round.  Freezing weather will not damage the collector, but readings of snow or freezing rain are not to be considered accurate readings of rainfall.
Ships complete with 60', 22 AWG, 2-wire, UV protected cable.

Rain Collector Sensor Rainfall Sensor Specifications 
* Type: Tipping bucket, self-emptying
* Dimensions: 8.63" O.D. x 7.88" Deep
* Weight: 1.77 lbs.
* Cable: 60', 22 AWG, 2-wire, UV protected
* Collector Diameter: 8.00"
* Collector Height: 8.00"
* Mounting Diameter: 9.60"
* Housing Materials: ABS Plastic
* Housing Color: Dark Green or Black
* Accuracy: +/- 1% at rates of rainfall up to 1" per hour if collector is properly maintained.
* Required Maintenance: Keep the collecting area and screen free of debris (leaves, branches, etc.). Glean the tipping bucket surfaces and the external surfaces of the collector occasionally with a mild detergent.
* Counting Mechanism: Self-draining, tipping bucket design. The mechanism is factory calibrated so that it automatically tips every 0.01" when installed on a level surface. As the bucket tips a magnet passes back and forth in front of a reed switch. The reed switch is activated as the magnet passes by causing a normally open circuit to be closed momentarily. Each time the circuit is closed the digital readout counts up 0.01".
* Electrical Characteristics :
     Switched current: max 500 mA
     Switched voltage: max 200 VDC
     Contact Resistance: max 100 mOhm
     Contact Capacitance: max 0,25 pF

OXY-Flex Oxygen Analyser

The OXY-Flex Oxygen Analyser is suitable for measuring in oxygen closed systems, such as ventilation pipes and boiler exhaust flues. 

The OXY-Flex Oxygen Analyser is designed to measure the oxygen concentration in air or gas mixtures with temperatures of -100 to 400⁰C. The oxygen analyser employs a well proven, small zirconium dioxide based element at its heart and due to its innovative design does not require a reference gas. The oxygen sensor element is mounted in the tip of the stainless steel probe and is protected by a sintered stainless steel cap. The IP65 waterproof die-cast aluminium housing accommodates the electronics and provides the interface for the customer to connect to.
The OXY-Flex Oxygen Analyser uses a unique closed loop measurement system. While the sensor continuously measures the oxygen level, a heartbeat signal is also generated providing an immediate warning of any failures.
The OXY-Flex can be configured to output measuring ranges of 0-25% O₂ or 0-100% O₂. The entire measurement range is linear in both cases. The outputs can be configured to either 4-20mA and 0-10Vdc outputs or an RS232 serial communications interface.
Typical applications include; combustion control of industrial boilers, burning oil, gas, coal or biomass; incubators; composting probes and welding equipment.

Performance evaluation of ultra small volume temperature and humidity sensors HTU21D and SHT21

Performance evaluation of ultra small volume temperature and humidity sensors HTU21D and SHT21
Ultra small size of the temperature and humidity sensor with small volume, high accuracy, is widely used in mobile phone, HVAC, communications, medical, environmental monitoring, household appliances, control panels, editor recently from isweek ( http://www.isweek.com/ ) to get the market on the most commonly used HTU21 and SHT21 two of the sample product. These two kinds of products to do a detailed comparative evaluation, the evaluation focuses on the price, performance, power consumption and other aspects of analysis, for your reference.

HTU21d
1、HTU21D temperature and humidity sensor features
Humidity sensing elements made of high performance based on a new generation of HTU21D temperature and humidity sensors set new standards in size and intelligence: it embeds without pin DFN package for double row flat reflow, bottom 3x3mm, 1.1mm. height sensor output after calibration of the digital signal, the standard I2C format. The output mode of diversification the wide operating voltage range, with high accuracy and precision of temperature humidity.HTU21 series module designed for low-power small volume design, good quality, fast response speed, strong anti-interference ability, high price Dots, tiny volume (3x3mm), and extremely low power dissipation make the HTU21D the choice for all types of applications.
2、Comparison of important parameters of HTU21 and SHT21 sensors：

Module	HTU21D	SHT21
Supply Voltage	1.5-3.6V	2.1-3.6V
Humidity operating range	0-100%RH	0-100%RH
Tempertaure operating range	-40℃-125℃	-40℃-125℃
Maximum power consumption	2.7uW	3.2uW
Output	I2C	I2C
Relative Humidity Accuracy	±2%RH	±2%RH
Response Time	5S	8S

From the above comparison can be seen:
Although the HTU21D and SHT21 parameters are generally similar, but slightly HTU21D some advantages: wide supply voltage (1.5V - 3.6V), lower power consumption than the SHT21 (2.7uW), HTU21D + 2%RH with humidity accuracy is higher than SHT20 (+ 3.5%RH), equivalent to SHT21 (+ 2%RH), but the price is over SHT21 cheaper, 5S response time is faster.
3. HTU21D sensor size is as follows:
1) Sensor size：

Note: dimensions are mm, tolerance is + 0.1mm, has grounding sensor at the bottom.
2） The back electrode of the sensor and size

4、Comparison of appearance and pin aspects of HTU21D and SHT21
The appearance and size distribution and pin definition, HTU21D and SHT21 are exactly the same, can be directly implemented pin to pin replacement.
 
HTU21D                       SHT21
　　5、HTU21D and SHT21 software：
The HTU21D and SHT21 are both I2C interface digital outputs with the same timing of start and stop signals.
· Activating signal
Start the transmission, sending a data, including the DATA line in the SCK line during a high level to low level jump.

· Break alarm
The termination of transmission, stop sending data, including the DATA line in the SCK line of high level during a jump to a high level.

HTU21D and SHT21 have the same command list：
 
Both HTU21D and SHT21 are the actual use of the four pins, power supply and power supply, two port I2C communication. The output is digital quantity: 14 bit and 12 bit temperature humidity value, can also through the user registers to modify 12 temperature and 8 humidity.
Therefore, HTU21D and SHT20, fully compatible with SHT21 protocol software, can be replaced by each other.
6、HTU21D temperature and humidity sensor actual measurement effect display:
1）Using four bit temperature and humidity demonstration Demo test, and with the host computer software to implement data records:

Four bit temperature and humidity demonstrationDemo

PC recording software
As can be seen from the figure above, the consistency of the 4 HTU21D products is very good. From the graph, we can see that the recorded data curve has been flat, indicating that the HTU21D stability is good
2）Using homemade ribbon HTU21 with 1602LCD display, and high-precision handheld table data contrast
In order to facilitate customer testing, manufacturers introduced has been welded with small PCB board HTU21D PCBA:


Conclusion: HTU21D and SHT20, fully compatible with SHT21, hardware pins can achieve Pin to Pin, no need to modify the circuit board. The software program is basically the same, both can achieve a compatible replacement, do not need to make any changes. From the manufacturer's price, HTU21D SHT21 more than SHT20, the price advantage is good choice for manufacturers to reduce production cost.

Application of Mass Flowmeter in Industrial Welding Protection Gas

Application of Mass Flowmeter in Industrial Welding Protection Gas
The volume of the fluid is a function of the fluid temperature and pressure, a dependent variable, and the mass of the fluid is an amount that does not vary with time, space temperature, and pressure. As mentioned earlier, flowmeters, such as orifice flowmeter, turbine flowmeter, vortex flowmeter, electromagnetic flowmeter, rotor flowmeter, ultrasonic flowmeter and elliptical gear flowmeter, are commonly used in flowmeters. Volume flow. The amount of fluid involved in activities such as scientific research, production process control, quality management, economic accounting and trade handover is generally quality. Using the flowmeter only to measure the volume flow of the fluid is often unable to meet the requirements of people, usually also need to try to get the mass flow of fluid. It is only possible to obtain the quality of the fluid indirectly by means of correction, conversion and compensation after measuring the parameters such as temperature, pressure, density and volume of the fluid. This measurement method, the intermediate links and more, the accuracy of mass flow measurement is difficult to be guaranteed and improved. With the development of modern science and technology, there have been some direct measurement of mass flow measurement methods and devices, thus promoting the flow measurement technology progress.
In the modern industrial control, the stability and accuracy of the full realization of the need for accurate measurement of gas in the industrial welding of the protection of gas output is also a more careful control of the steps to ensure that does not pollute the environment, Good to complete the welding task, the mixture of carbon dioxide and argon can control precision.
Siargo MF4000 Series Gas Flow Meters provided by Shenzhen ISweek  

The MF4000 Series Mass Flow Meters are designed for flow metering of low velocity airflow in gas lines with diameters of 3 mm to 8 mm. The bayonet design provides a simple installation for the user to meet the needs of the user to measure multiple gas lines. Plastic bayonet can be easily carried out mechanical interface conversion, applied to different low-cost environment. The table can be used for anesthesia machine electronic form, can also be applied to other industries.
The sensor can directly measure the gas mass flow, low pressure loss. Suitable for clean air or nitrogen flow monitoring, can also be used for environmental samplers (such as chromatographic equipment, etc.)
FS4003 flow sensor, pipe diameter of 3mm, low cost measurement range up to 5SLPM; for particle counters and various types of analytical instruments.
FS4008 flow sensor, the pipe diameter of 8mm, measuring range up to 50SLPM; can be used for equipment, clean gas detection, such as: air sampling machine, gas analyzer.
Features
 Designed for gas flow in fixed flow channel of 3 mm and 8 mm, with accumulated flow
Compact design ready for manifold applications
Fast response time provides slutions for critical applications
Excellent for electronic meters in anesthesia equipments
Exchangeable mechanical connectors for easy installation at different applications
Intrinsic safe enclosure for wide applications
Low power consumption, can be operated by battery

Compared to other large volume, high cost, complex installation of the flow meter, MF4000 series still has a clear advantage in the rapid installation, small size has its obvious advantages. With a display and linear, RS232 / RS485, analog voltage 0.5 ~ 4.5Vdc output can do the output signal processing, for the subsequent measurement and testing left a lot of time.

Humidity and Temperature Sensor Module - HTG3535CH

Humidity and Temperature Sensor Module HTG3535CH DESCRIPTION
Based on the rugged HUMIREL humidity sensor, HTG3535CH is a dedicated humidity and temperature plug and play transducer designed for OEM applications where a reliable and accurate measurement is needed. Direct interface with a micro-controller is made possible with the module’s humidity linear voltage and direct NTC outputs. HTG3535CH is designed for high volume and demanding applications.

Humidity and Temperature Sensor Module HTG3535CH FEATURES
• Voltage Supply: 5 Vdc
• Nominal Output @55%RH:  2.401~2.559 V
• Humidity Average Sensitivity: +26 mV/%RH
• Current consumption: 1.2 mA dc
• Humidity Measuring Range: 0~100 %RH
• Humidity Operating Range: 0~100%RH
• Temperature Operating Range: -40 ~110°C
• Suitable for small bulk assembly
• Product free from Lead, Cr (6+), Cd and Hg. Compliant with RoHS
• Full interchangeability. Better than +/-3%RH and +/-0.25°C 
• Humidity calibrated within +/- 3% RH @ 55% RH 
• Temperature measurement through NTC direct output
• Demonstrated reliability and long term stability 
• Reliability not affected by repeated condensations

Humidity and Temperature Sensor Module HTG3535CH APPLICATIONS
• Automotive
• Home Appliance
• Printers

Air Quality Detection Module

FAM-001-01 Air Quality Detection Module Description:
FAM-001-01 is combined with sensor TGS2600 which detects indoor air quality, it is high sensitivity to low concentration pollutions, like cigarettes, cooking, TVOCS.

FAM-001-01 Air Quality Detection Module Features:
* Low power consumption
* Long Lifetime
* High selective to low concentration gas
* High sensitivity to cigarette or cooking and VOCS

FAM-001-01 Air Quality Detection Module Applications:
* Indoor Air Purifier
* Indoor Air Quality Monitor
* Air Condition
* HVAC

SMTAS08USBmini – Evaluation board for Temperature Sensors SMT172

SMTAS08USBmini – Evaluation board for Temperature Sensors SMT172

SMTAS08USBmini – Evaluation board for SMT172 Introduction
This document describes an 8 channel temperature measurement system: The New Smart Temperature Acquisition System (SMTAS08usbmini). This system is based on the use of the Smartec temperature sensors SMT172. The SMT172 is a three terminal integrated temperature sensor with a duty cycle output. Two terminals are used for the power supply of and the third terminal carries the output signal. The output signal of the sensor is a duty-cycle-modulated square-wave signal (see Figure 1).


SMTAS08USBmini – Evaluation board for SMT172 Ordering information

SMTAS08USBmini	Temperature Acquisition System for 8 Smartec temperature sensors (USB).
SMTAS04USBmini	Temperature Acquisition System for 4 Smartec temperature sensors (USB).
SMT172-TO18	Smartec temperature sensor in TO18 encapsulation (metal can)
SMT172-TO92	Smartec temperature sensor in TO92 encapsulation (commercial)
SMT172-TO220	Smartec temperature sensor in TO220 encapsulation
SMT172-SOIC-8	Smartec temperature sensor in SOIC8
SMT172-SOT223	Smartec temperature sensor in SOT223 housing
SMT172-HEC	Smartec temperature sensor as small hybrid element

Zirconia Oxygen Sensors

Manufacturers Of Robust And Reliable Zirconium Dioxide Oxygen Sensors

SST's range of zirconium dioxide oxygen sensors use a unique closed loop measurement system. While the sensor continuously measures the oxygen level, a heartbeat signal is also generated providing an immediate warning of any failures.
The sensing technology and stainless steel construction allow these sensors to be used in environments where extreme pressure, temperature and high humidity are present.
SST's zirconium dioxide oxygen sensors offer a range of housing styles, cabling and electrical connections.
The sensors can be purchased alone or with integrated electronics offering digital or analogue industry standard outputs.  Their long operating life is due to the non-depleting sensor cell technology. No reference gas is required and easy single point calibration can be performed in any known gas including fresh air. The Zirconia Oxygen Sensors can measure over a wide oxygen range (0.1 to 100% O₂).
The reliability of these sensors means that they are used globally in applications ranging from composting to fuel tank inerting in civilian airliners.

• 

  Short Probe Zirconia Oxygen Sensor (Zirconia O2 Sensors) - O2S-T2 / O2S-FR-T2

  O2S-FR-T2 Short Probe Zirconia Oxygen Sensor. Long life, non-depleting technology. Can be used in high pressure and temperature environments.
  
• 

  Limiting Current Type Zirconia Oxygen Sensors - SO-E2-960

  Limiting Current Type Sensor Oxygen Sensors SO-E2-960, measuring range 1.00 to 96.0 vol.% oxygen. High accuracy
  
• 

  OXY-Flex Oxygen Analyzer Zirconia O2 Sensors

  OXY-Flex Oxygen Analyser, High accuracy linear output. Can be calibrated in fresh air (20.7% O2 ) or to any other known O2 concentration
  

Oxygen Sensor Interface Board

O2I-Flex Oxygen Sensor Interface Board FEATURES

• Provides the electronics necessary to power and control SST’s range of zirconium dioxide (ZrO2 ) sensors
• Externally triggered automatic or manual calibration. Calibration can also be initiated via an on-board push button
• Power and sensor operating LEDs
• Removable polarised screw terminals for easy wiring


O2I-Flex Oxygen Sensor Interface Board BENEFITS
• Adaptive software filtering provides a fast sensor response coupled with a stable oxygen output
• High accuracy linear output
• Can be calibrated in fresh air (20.7% O2 ) or in any other known O2 concentration


O2I-Flex Oxygen Sensor Interface Board TECHNICAL SPECIFICATIONS

Supply voltage	24V DC ± 10%
Supply current	600mA max. at 24V DC
Digital output	RS232
Analogue output	4 ~ 20mA; load 100 ~ 600Ω or  0 ~ 10V DC ; load 10kΩ min
Temperature limits      Storage:     Operating:	-10°C to +70°C -10°C to +70°C
Oxygen pressure limits	1 ~ 1000mbar

O2I-Flex Oxygen Sensor Interface Board OUTPUT VALUES

Oxygen range (analogue output)	0.1 ~ 25% O2 or 0.1 ~ 100% O2
Oxygen range (RS232 output)	0.1 ~ 100% O2
Accuracy after calibration	1% O2
Repeatability after calibration	0.5% O2
Output resolution:     0 - 10V DC:     4 - 20mA:     RS232:	0.01V 0.01mA 0.01% O2
Response time (step 10 - 90%)     Fast response sensor connected:     Standard response sensor connected:	< 4s < 15s
Initial warm up time (till stable output)	5 ~ 10mins
Output inactive start up delay (heater warm up)	60s

Miniature Infrared CO2 Sensor Module - S8-4B

S8-4B Miniature Infrared CO2 Sensor Module General Description
The S8-4B CO2 sensor module is designed to serve as a CO2 safety switch when built-in into kerosene heaters. The sensor utilizes reliable and highly accurate infrared gas sensing technology. The electronic circuitry is optimized for low power consumption. Because of low current consumption the sensor is suitable for battery applications and has an average current consumption of 2 mA.

S8 can be customized for a variety of alarm and control applications.

S8-4B Miniature Infrared CO2 Sensor Module  Key technical specification

Item	S8-4B Article no. 004-0-0061
Target gas	CO2
Operating Principle	Non-dispersive infrared (NDIR)
Measurement range	400 to 32000ppm (represented internally in digital format)
Measurement interval	30 seconds
Accuracy	±1000ppm at alarm points between 7000 and 9000 ppm (Note 1)
Pressure dependence	+ 1.6 % reading per kPa deviation from normal pressure
Gas diffusion response time	2 minutes by 90%
Operating temperature	-5 to 60 ºC
Operating humidity range	0 to 95% RH non condensed
Storage temperature	-40 to +70°C
Storage Environment	0-95% RH non condensed non corrosive gases, no contamination to kerosene
Dimensions (mm)	61 x 20 x 8.5 mm (max dimensions)
Weight	< 10 grams
Power supply	4.5 to 7.0 VDC unprotected against surges and reverse connection
Power consumption	250 mA peak, 2 mA average
Life expectancy	5+ years in normal indoor / office environments
Compliance with	Tested according Emission EN 61000-6-3:2007, EN 61000-6-4:2007 Immunity EN 61000-6-1:2007 RoHS directive 2011/65/EU
Output Alarm, Open Drain	Open drain FET; 7V/ 800mA, protected by a zener diode, normally open, 100kWpull-up resistor to power (+). 8000/6500 (Alarm/Release) Normal state is open. Transistor conducting at (CO2 > 8000ppm) OR (Unloaded Power voltage < 4.5V) OR (Loaded Power voltage < 4.0V) OR (Sensor Failure detected by self-diagnostics)
Maintenance	Forced calibration (assuming 400 ppm exposure).
Self-diagnostics	Full self-diagnostics at power up and continuously running self-diagnostics  at every measurement.

Note 1: Accuracy is specified over operating temperature range. Specification is referenced to certified calibration mixtures. Uncertainty of calibration gas mixtures (+-2% currently) is to be added to the specified accuracy for absolute measurements.

Dust Sensor Module DSM501B

Dust Sensor Module DSM501B Description
Dust Sensor Module: DSM501 series detects the level of indoor airborne dust, particles, and pollen, and ideal for use in stand-alone air cleaner or IAQ monitor. PWM output of the sensor can be directly connected to μ-com to control fan speed or ventilation and also to display the level of particles. Detectable size of particle is limited to minimum 0.7 μm, and the application for smoke or fire alarm is prohibited.
Dust Sensor Module DSM501BType:
DSM501A : 2mm pitch connector type (20010WR-05).
DSM501B : 2.5mm pitch connector type (S5B-EH).

Dust Sensor Module DSM501B Electrical characteristics:

Supply voltage	DC5V±10%
Power consumption	90mA
Operating temperature range	-10~ +65°C
Operating humidity range	95%RH or less (without dew condensation)
Recommend storage condition	-20~ +80°C
Dimension	W59 * H45 * D20 (mm)
Detectable particle size	approx. 1um (minimum)
Detectable range of concentration	0 ~ 1.4mg/m3
Output signal	PWM (pulse width modulation)
Time for stabilization	1 minute after power turned on
Sensor characteristics	To be maintained in between the upper limit and lower limit of the standard dust sensor unit

Dust Sensor Module DSM501BFeatures: 
• PWM output
• Easy installation
• Single power supply
• Compact size and lightweight

Dust Sensor Module DSM501B Application: 
• Ventilator etc
• Air conditioner
• Air quality monitor
• Air cleaner or Air purifier

The world's fastest battery-powered NDIR CO2 sensor

The world's fastest battery-powered NDIR CO2 sensor

Gas Sensing Solutions (GSS) Ltd, the LED-based NDIR detector specialists, continues to push the boundaries for CO2 detectors with the launch of its new SprintIR6S.  GSS' unique SmartIR™technology has enabled it to create a sensor that can take up to 20 readings per second, which is a world record for NDIR CO2 detectors, and has a six times faster response rate than the SprintIR CO2 sensor*.
Ralph Weir, GSS' CEO, explained, "We are the only company producing CO2 sensors using LEDs and photodiodes and, as we make the LEDs and photodiodes ourselves, we have been able to develop ultra-fast response times that no other NDIR sensor can match.  Typical NDIR CO2 detectors take several seconds or even minutes to take a reading - because they use slow-reacting IR sources, which need time and energy to warm up, like MEMS hotplates, micro-bulbs or filament-based micro-lamp technologies. Our LEDs, by contrast, are Solid State emitters, and illuminate almost instantly.  With the new SprintIR6S, we've also minimized the sample volume down to only 2ml, which enables us to achieve our fastest ever response rates*.  This puts us in a unique position to open whole new application areas for CO2 monitors that could never be addressed by slow responding sensors based on traditional IR sources."
Applications for this new class of ultra fast CO2 sensors include health where they can capture rapidly changing CO2 concentrations in the breathing cycle to provide diagnostic information, which can be used in fitness testing, breath analysis/measurement, capnography, sports science and veterinary to name a few.  In Industrial Health and Safety applications, such as factories where CO2 is used for modified atmospheres to delay packaged food from spoiling, they can provide ultra fast detection of rising CO2 levels.  Even a doubling or tripling of normal CO2 levels can affect concentration and productivity with higher levels having increasingly deleterious effects on health right up to unconsciousness and death. 
"A leak from a CO2 canister or similar can push CO2 levels up from the normal 400ppm to several thousand ppm in seconds," added Ralph Weir.  "You cannot smell CO2 and it is colorless.  Yet it can present serious health problems at raised concentrations so, the sooner an alarm is raised, the sooner people can take remedial action.  For example, restaurants and pubs usually have CO2 cylinders in the basement for the drinks but basements typically have poor ventilation so an undetected CO2 leak could suddenly raise the CO2 level when someone was in the basement and render them unconscious - or dead.  Our new sensors can give the earliest possible warning."
GSS' multi-patented SmartIR™ technology detects the presence of CO2 by detecting how much light is absorbed by CO2 molecules as light passes through the sample gases - called Non-Dispersive InfraRed (NDIR) absorption.  CO2 absorbs between 4.2 and 4.4 microns so that its presence is easily detected, and the amount of light absorbed indicates how much CO2 is present. Typically, CO2 detectors use a miniature heater (such as MEMS devices like micro hotplates, microlamp/microbulb or filament heater) to generate a range of wavelengths that have to be filtered down to the wavelengths needed, which is wasteful and energy inefficient, especially as a lot of heat is produced.  By contrast, GSS developed the world's first commercial, mid-range IR LEDs that are specifically tuned to emit just at 4.2 to 4.4 microns, making them highly energy efficient.  As a result, GSS CO2 sensors are the only NDIR CO2 sensors that can be powered by batteries - a single lithium cell can power a SmartIR sensor for up to ten years.
At less than a cubic inch (23.8mm in diameter and 24mm tall), the SprintIR6S operates at between 3.25 and 5.5V, with a power consumption of only 35mW.  The SprintIR6S is available in measurement ranges from 0%to 100%.
GSS will be revealing the new SprintIR6S detectors at the Sensor + Test show in Nuremberg, Germany from 30 May to 1 June 2017.
High Speed Carbon Dioxide Sensor NDIR CO2 Sensor SprintIR Summary
SprintIR is a high speed (20 Hz) CO2 sensor, ideally suited for applications which require capture of rapidly changing CO2 concentrations including metabolic assessment and analytical instrumentation.

Fast, Accurate Carbon Dioxide Sensor
The SprintIR carbon dioxide sensor is the fastest, most accurate CO2 sensor on the market. A breakthrough in NDIR technology, the SprintIR uses advanced solid state Indium Antimonide LED’s and detectors to offer a robust sensor with no moving parts, no heated filaments, and incredibly low power requirements. The sensor comes in four versions - from 0% to 100% - all capable of the same high-speed CO2 measurement. This makes the SprintIR especially useful in biological applications.

• High speed sensing (20Hz)
• Measurement ranges from 0 to 100%
• 3.3V supply
• Low power requirement 35mW
• Flow through adaptor (Optional)


High Speed Carbon Dioxide Sensor NDIR CO2 Sensor Specifications

CO2 Measurement
Sensing Method	Non-dispersive infrared (NDIR) absorption Patented Gold-plated optics Patented Solid-state source and detector
Sample Method	Diffusion(Standard) / Flow through (with flow-through adapter)
Measurement Range	0-5%, 0-20%, 0-60%, 0-100%
Accuracy	±70 ppm +/- 5% of reading
Measurement Noise	<10% of reading with no digital filtering
Non Linearity	< 1% of FS
Pressure Dependence	0.1% of reading per mbar in normal atmospheric conditions
Operating Pressure Range	950 mbar to 10 bar
General Performance
Warm-up Time	< 1 minute
Operating Conditions	0°C to 50°C (Standard) -25°C to 55°C (Extended range) 0 to 95%, RH non-condensing
Recommended Storage	-30°C to +70°C
Electrical/ Mechanical
Power Input	3.2 to 5V. (3.3V recommended) Peak current 100mA Average Current <15mA
Power Consumption	35 mW
Output	UART only

HTF3223LF Humidity Sensor

HTF3223LF Humidity Sensor Module for Humidifier, OA Equipment

Temperature and humidity sensor HTF3223L
1. range: 0-99%RH
2.Stable, linear proportional frequency output from 10 to 95

• Model Number: HTF3223LF

Product Specification

Temperature and humidity sensor module HTF3223
Description of humidity module HTF 3223LF
Based on the rugged HS1101LF humidity sensor, HTF 3223LF is a dedicated humidity and temperature transducer designed for OEM applications where a reliable and accurate measurement is needed. It features a miniature connector for easy, cost-effective mechanical mounting. Direct interface with a micro-controller is made possible with the module’s linear frequency output.

Main features of humidity module HTF 3223LF
(1)Calibrated within +/- 5% RH @ 55% RH.
(2)Optional 10 K +/- 3% NTC temperature sensor
(3)Fast response time. High resistance to chemicals.
(4)Size and connector type match existing humidity modules.
(5)Stable, linear proportional frequency output from 10 to 95% RH.
(6)Instantaneous de-saturation after long periods in saturation phase.
(7)Not affected by water immersion. Patented solid polymer structure.
(8)Stable characteristics with temperature. High reliability and long term stability.

GUVA-S12SD UV Sensor

The GUVA-S12SD UV Sensor chip is suitable for detecting the UV radiation in sunlight. It can be used in any application where you want monitor for the amount of UV light and is simple to connect to any microcontroller. I recently noticed that some sellers had little modules for this sensor at a reasonable price so decided to purchase one

The module, with a typical UV detection wavelength of 200 – 370nm, outputs a calibrated analog voltage which varies with the UV light intensity so basically all you need to do is connect this to an ADC input and read in the value.
This value ties in with the UV index, this looks something like this


Connection
The connections are straightforward and described below, I used 3.3v from my Arduino. This was mainly for compatibility with other development boards but the module works with 5v.
1. GND: 0V (Ground)
2. VCC: 3.3V to 5.5V
3. OUT: 0V to 1V ( 0 to 10 UV Index)
Layout
As said its a simple layout but here you go


Code
Simple code example that reads the value at A0 and outputs the results via the serial monitor, if you use 5v rather than 3.3v then you will need to change the 3.3 in the following line

sensorVoltage = sensorValue/1024*3.3;    

Source code

void setup()   {    Serial.begin(9600);  }     void loop()   {    float sensorVoltage;     float sensorValue;       sensorValue = analogRead(A0);    sensorVoltage = sensorValue/1024*3.3;    Serial.print("sensor reading = ");    Serial.print(sensorValue);    Serial.println("");    Serial.print("sensor voltage = ");    Serial.print(sensorVoltage);    Serial.println(" V");    delay(1000);  }

Testing
Open the serial monitor and look at the readings
sensor reading = 46.00
sensor voltage = 0.15 V
sensor reading = 46.00
sensor voltage = 0.15 V
sensor reading = 46.00
sensor voltage = 0.15 V
sensor reading = 46.00
sensor voltage = 0.15 V
sensor reading = 46.00
sensor voltage = 0.15 V
If you look at the image earlier that corresponds to UV index of 0 which is a relief because I tested this indoors

UV-A Sensor - GUVA-S12SD

Product Specification

1.Features
Gallium Nitride Based Material
Schottky-type Photodiode
Photovoltaic Mode Operation
Good Visible Blindness
High Responsivity & Low Dark Current

2.Applications
UV Index Monitoring
UV-A Lamp Monitoring

3.Outline Diagrams and Dimensions



4.Details

Gas detector test isweek

CO2 Sensor Occupancy Detection

A group of researchers at the University of California in Berkley have designed an algorithm that can count the number of people in a room when only the CO2 level is known.
The study, titled “Sensing by Proxy: Occupancy Detection Based on Indoor CO2 Concentration” used SenseAir’s K-30 carbon dioxide sensor module for occupancy detection. The "Sensing by Proxy" model is more accurate than previously used machine learning models, and could be used to improve the efficiency of Demand-Controlled Ventilation systems (DCV) currently in use.
DCV works on the principle that you can save energy by heating, cooling or adding fresh air to a room only when it is needed. While heating and cooling can be controlled with a thermostat, the amount of fresh air that should be added to a room can be controlled by a carbon dioxide level transmitter. When CO2 levels go up, fresh air is added until the CO2 levels return to normal (typically 10% or less of the background CO2 levels).

While CO2 transmitters in a DCV system are good at monitoring CO2 levels, they do not tell you the number of occupants in a room. This is important because indoor air quality models specify the optimum fresh air exchange rate per person. If you don’t know how many people are in a room, all the system can do is pump in fresh air until the CO2 level drops.
This is where Sensing by Proxy comes in. Using the K-30 sensor’s CO2 level data as the only input, the researchers were able to create a model “that captures the spatial and temporal features of the system and links unobserved human emission to proxy measurements of CO2 concentrations.”
The algorithm they developed was tested in both controlled and field experiments, and resulted in an error rate of 0.6 fractional persons as compared to 1.2 fractional persons by the best alternative strategy. The algorithm is also better at measuring changes, such as occupants entering and leaving a meeting. In addition, it does not require more costly Pyroelectric infrared (PIR) or Ultrasonic sensors used for current occupancy detection systems.
The algorithm is one of a growing number of papers that test the use of CO2 levels for occupancy detection. For example, Chaoyang Jiang and others in a paper titled “Indoor occupancy estimation from carbon dioxide” were able to estimate occupancy in an office with 24 cubicles. They counted occupants accurately 94 percent of the time within a tolerance of four occupants.
While DCV is initially more expensive to install, improvements like this could be used to further reduce the long-term energy costs in DCV controlled buildings.

UV Sensor Module - GUVB-T21GH

- Chip size 0.4mm,TO 5 PKG
- Single Supply Voltage Operation
- Voltage Output
- High Sensitivity and Good Solar Blindness
- Small and Compact Size

• Model Number: GUVB-T21GH

Product Specification