Figaro - Model TGS823 - Organic Solvent Vapor Sensor - Brochure

The sensing element of Figaro gas sensors is a tin dioxide (SnO2) semiconductorwhich has low conductivity in clean air.  In the presence of a detectable gas,the sensor`s conductivity increases depending on the gas concentration inthe air.  A simple electrical circuit can convert the change in conductivity toan output signal which corresponds to the gas concentration. The TGS 823 has high sensitivity to the vapors of organic solvents as well asother volatile vapors.  It also has sensitivity to a variety of combustible gasessuch as carbon monoxide, making it a good general purpose sensor.  Itsceramic base can withstand severe environments as high as 200°C.