What sensor is used for toxic gas detection?

Electrochemical sensors and PID sensors are used to detect toxic and harmful gases.

I. Electrochemical sensor

Electrochemical gas sensor uses the electrochemical activity of the gas to be measured to electrochemically oxidize or reduce it, so as to distinguish the gas components and detect the gas concentration.

It can accurately measure the content of trace gases in the air (ppm level) or be used for environmental monitoring, such as corrosive or toxic gases, such as O2, CO, H2S, CO2, s O2, NH3, HCN and HF.

* oxygen must participate in the redox reaction.

Second, the PID sensor.

Photoionization gas sensor, usually called PID. It is a highly sensitive and multifunctional detector, which can detect volatile organic compounds and other toxic gases from 10ppb to higher concentration 10000ppm. Many harmful substances contain volatile organic compounds, and PID is highly sensitive to volatile organic compounds.

PID can detect aromatic hydrocarbons, ketones, aldehydes, chlorinated hydrocarbons, amines, amine compounds and unsaturated hydrocarbons.