Figaro TGS821-A00, Hydrogen Air Quality Sensor

TGS821, TGS822, TGS823 ; TG826 Gas Sensors. A range of gas sensors from Figaro utilising tin dioxide (SnO2) semiconductor technology. In clean air the devices have low conductivity which increases in the presence of a detectable gas. A simple electrical circuit can be used to convert the change in conductivity to an output signal proportional to gas concentration. Type TGS821 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. Types TGS822 ; TGS823 have high sensitivity to the vapours of organic solvents and a variety of combustible gases such as carbon monoxide, making them good general purpose sensors; type TGS823 has a ceramic base able to withstand temperatures of up to 200°C. Type TGS826 has high sensitivity to ammonia gas and can detect concentrations as low as 30ppm. It is ideally suited to critical safety-related applications such as the detection of ammonia leaks in refrigeration systems and ammonia detection in the agricultural field.