Special Sensor for Hydrogen Gas

The sensing element of Figaro gas sensors is a tin dioxide (SnO2) semiconductor which has low conductivity in clean air.  In the presence of a detectable gas, the sensors conductivity increases depending on the gas concentration in the air.  A simple electrical circuit can convert the change in conductivity to an output signal which corresponds to the gas concentration.
The TGS 821 has high sensitivity and selectivity to hydrogen gas.  The sensor can detect concentrations as low as 50ppm, making it ideal for a variety of industrial applications.

FEATUREs:
* High sensitivity and selectivity to hydrogen
   gas
* Good repeatability in measurement and
   excellent stability
* Uses simple electrical circuit
* Ceramic base resistant to severe
   environment

APPLICATIONs:
* Hydrogen gas detection for:
   - transformer maintenance
   - batteries
   - steel industry usage
   - etc.