$167 bikini uses UV sensor, app, to tell you how to tan

The Internet of Things -- connecting everyday items with sensors -- is hitting the beach in time for the northern hemisphere's summer with a bikini that says when it's time to apply more sun screen.

The made-to-measure invention comes from France -- the country that invented the bikini -- but with a price tag that might make even the well-tanned beach amazon blanch: 149 euros ($167).

For that price, though, the wearer will get a two-piece swimsuit with a small detachable ultraviolet sensor that, through a smartphone or tablet, sends a "sun screen alert" when the user's skin needs more protective sunblock cream.

The detector is calibrated to the wearer's skin type and how much of a tan she wants to get.
And there's even a "Valentine" function that sends the message to a boyfriend's smartphone so he knows when to apply the cream to his girlfriend's skin.

"The idea came to me right away, on a day when I saw someone get sunburnt on a beach," the Frenchwoman behind the smart bikinis, Marie Spinali, told AFP.

'Not a gimmick'
She started her company, Spinali Design, last month in the eastern French town of Mulhouse where she lives, and sells the bikinis through her website.

"There are flowerpots that give an alert when plants need watering, so I thought it was time to invent something to warn when the sun is too strong," she said.

"It's not a gimmick," she added, explaining that often when people think to add more suncream, it's too late and they already have sunburn.

An expert, Doctor Claudine Blanchet-Bardon of France's National Association of Dermatologists, said the device was "interesting, because anything that warns people against UV exposure is good".

But she qualified that by saying that having the sensor attached to a bikini "doesn't send the right message -- the best protection against the sun is to not get too much exposure and to stay covered with clothes".

A journalist for a French website specialised in the Internet of Things, Thomas Remilleret of ObjetConnecte.net, commented that the idea of having UV detectors linked to a smartphone app is "not really new or revolutionary".

But, he acknowledged, Spinali's bikinis "meet a demand" even though he believed their price still too high for the market.

Spinali said her team was working with French researchers in nanotechnology to come up with a smaller UV sensor that would be part of the bikini itself.

She also said they were at work on models for men and for children -- with the sensors for the latter also featuring GPS locators, to quickly find kids on the beach.

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A practical capacitive type CO2 sensor using CeO2/BaCO3/CuO ceramics

A practical capacitive type CO2 sensor composed of CeO2/BaCO3/CuO mixed oxides has been developed for the IAQ (indoor air quality) monitoring system. Sensing detectors were fabricated as follows. The pressed pellets of CeO2/BaCO3/CuO mixed oxides were sintered at 800–900°C for 5 h, then RuO2 electrode was formed on both sides of the pellets.

In order to study CO2 sensing characteristics, the capacitance of detector was measured at 550°C with an LCR meter. The sensitivity of Cat2%CO2/Cin-air was measured to be −2.5 dB. They showed good stability in CO2 sensitivity at 85°C and 90% RH test for 1500 h. The sensor unit with an oscillation circuit using this detector was developed, and its monitoring characteristics were studied.

It was shown that the sensitivity change was negligible between 0% RH and 60% RH at 30°C. The measurement error of CO2 sensor was within 200 ppm in the humidity range of 40–90% RH, and within 30 ppm/°C in the temperature range of 5–50°C. A CO2 concentration profile monitored in an office by the developed sensor unit showed good agreement with that monitored by an NDIR type sensor.

These results suggest that the developed CO2 sensor unit may be applicable to indoor quality monitoring systems. The alumina substrate, which integrates the sensing detector of 1.6∗1.2∗0.5 mm3 and the printed-film heater, is small (3.6∗2.8∗0.4mm3) and need no damp proofing, so that small size and low cost of the sensor can be easily attained.

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Measuring cell for an electrochemical gas sensor

The invention is directed to a measuring cell for an electrochemical gas sensor having an electrolytic chamber and a measuring electrode as well as a counter electrode. In the direction facing the ambient, the measuring electrode includes a diffusion membrane as well as a diffusion barrier.

The diffusion barrier is made of a material which is a good conductor of heat and is provided with a plurality of passages. A temperature-sensitive element is provided in the immediate proximity of these passages and faces toward the ambient. With this configuration, the temperature dependency of the diffusion capacity of the gas sample passing through the diffusion barrier can be included in the processing of the signal indicative of the measurement.

Description
FIELD OF THE INVENTION
The invention relates to a measuring cell for an electrochemical gas sensor having a housing defining an electrolytic chamber which accommodates at least one measuring electrode and a counter electrode. A porous membrane is mounted in the housing and separates the chamber from the ambient to be investigated and contains the electrolyte in the chamber. The porous membrane is permeable to the gaseous substance to be detected. The measuring cell also includes a diffusion barrier mounted in the housing so as to be interposed between the ambient and the membrane and includes passages for passing the gaseous substance to the porous membrane.


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New Technology on Methane Sensor

The new technology was developed for methane sensor: the process of dynamic matching for the catalytic component and the compensating component, new measuring circuit and the automatic adjustment for the sensibility of the sensor.

Through the studying of the dynamic matching of catalytic components the consistence of two components of the sensor is increased and the zero-drift is decreased.

Using this new measuring method the stability of sensibility of the sensor can be improved. Basis of the researching on the automatic adjustment of the sensor the automation process and its reliability of the methane monitor can be carried out.

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Wholesale and Industry Sourcing CO2 Sensor 0-5% to 0-100% - CO2S-W-5

Still wondering where is to get the CO2 Sensor? Isweek provides a lot of sensors, such as, CO2 sensor, UV sensor, gas sensor, temperature and humidity sensor, pressure sensor, ndir gas sensor, ndir co2 sensor and so on.

Description of CO2 Sensor 0-5% to 0-100% - CO2S-W-5

Our CO2S-W Wide Range Sensor is an extension to the CO2S-A Ambient range sensor family. It is an ultra low power (3.5mW), high performance CO2 sensor, ideally suited for battery operation, portable instruments and HVAC.

Based on the same IR LED, Detector technology and innovative optical designs as the ambient range sensor, the CO2S-W Wide Range sensor offers the lowest power NDIR sensor available in the world at measuring ranges from 0-5% to 0-100%

Features/Benefits 
Ultra Low Power - 3.5mW
Measurement range from 5% to 100%
3.3V Supply
Peak Current only 33mA
Optional Temperature and Humidity Output

For more:

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CVD-grown monolayered MoS2 as an effective photosensor operating at low-voltage

We report the fabrication of a photosensor based on as-grown single crystal monolayers of MoS2 synthesized by chemical vapor deposition (CVD).

The measurements were performed using Au/Ti leads in a two terminal configuration on CVD-grown MoS2 on a SiO2/Si substrate. The device was operated in air at room temperature at low bias voltages ranging from −2 V to 2 V and its sensing capabilities were tested for two different excitation wavelengths (514.5 nm and 488 nm). The responsivity reached 1.1 mA W−1 when excited with a 514.5 nm laser at a bias of 1.5 V.

This responsivity is one order of magnitude larger than that reported from photo devices fabricated using CVD-grown multilayered WS2. A rectifying-effect was observed for the optically excited current, which was four times larger in the direct polarization bias when compared to the reverse bias photocurrent. Such rectifying behavior can be attributed to the asymmetric electrode placement on the triangular MoS2 monocrystal.

It is envisioned that these components could eventually be used as efficient and low cost photosensors based on CVD-grown transition metal dichalcogenide monolayers.

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Monitoring Building Door Events using Barometer Sensor in Smartphones

Building security systems are commonly deployed to detect intrusion and burglary in home and business structures. Such systems can accurately detect door open/close events, but their high-cost of installation and maintenance makes them unsuitable for certain building monitoring applications, such as times of high/low entrance traffic, estimating building occupancy, etc.

In this paper, we show that barometer sensors found in latest smartphones can directly detect the building door open/close events anywhere inside an insulated building. The sudden pressure change observed by barometers is sufficient to detect events even in presence of user mobility (e.g. climbing stairs). We study various characteristics of the pressure variation due to door events, and demonstrate that door open/close events can be recognized with an accuracy range of 99.34% - 99.81% based on the data collected from 3 different buildings. Such a low-cost ubiquitous solution of door event detection enables many monitoring applications without any infrastructure integration, and it can also work as an augmentation to the existing expensive security systems.

Building security systems have become commonplace for protecting against intrusions and burglary in homes, offices and businesses. Currently, most prevalent form of building security system requires installing an electrical circuit on the periphery of doors to detect their open/close events. However, due to their high cost, these building security systems are undesirable for many simple monitoring applications, such as logging door open/close events, estimating building occupancy, times of high/low entrance traffic, etc. In fact, these needs of monitoring building door open/close events can be fulfilled with a barometer sensor in a latest smartphone, which requires no infrastructure integration.

In this paper, we provide an empirical evidence that the barometer sensor commonly found in latest smartphones can directly detect the building door open/close events anywhere inside an insulated building. This observation is based on the fact that most of the buildings are equipped with HVAC(Heating, Ventilating and Air Conditioning) systems to maintain a convenient indoor temperature and pressure. It uses a compressor to eject/absorb the air to/from the outside for ventilation, which creates a noticeable pressure difference between the indoor and outdoor environment. When a building door is opened, the sharp change of indoor pressure can be easily observed using smartphone barometer sensors. Once the door is closed, the HVAC system restores the pressure level allowing the detection of next open/close event.

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