As we all know, hydrogen is a very light gas, colorless, odorless, non-toxic, flammable and explosive. Its density (unit: g/cm3 or kg/m3) is very small, only 1/14 of air. Mixing with fluorine, chlorine, oxygen, carbon monoxide and air has the risk of explosion. The hydrogen detector is a gas detection instrument specially used to check the concentration of hydrogen. Although the hydrogen detector is widely used, many friends know little about its principle. Do you know the principle of hydrogen detector ? The following is a brief introduction by yi yun Tian:

hydrogen gas in the air can be checked by using the hydrogen detector. it is the 1 instrument that can continuously detect the hydrogen concentration in the working environment. When the hydrogen detector senses the presence of toxic gases in the measured place, the sensor converts the hydrogen concentration signal into a voltage signal or a current signal and transmits it to the alarm instrument, and the instrument shows the percentage concentration value of the lower explosive limit of hydrogen gas. There are three principles used by the sensor, as follows:

1, catalytic combustion principle:

detect the lower explosion limit of hydrogen, the range is 0-100% LEL(0-4% VOL).

2, electrochemical principle:

detects hydrogen concentration in small range, range: 0-1000,2000,5000,10000,40000ppm, high precision and good sensitivity.

4, thermal conductivity principle:

detects the purity of hydrogen, with a range of 0-10%,50%,100 VOL.

These three principles of hydrogen detectors have their own advantages, and they are generally selected according to specific requirements in industrial production.

In summary, it is the principle of the hydrogen detector. Hydrogen detector is a gas sensitive and alarm sensitive detector in today's industrial field. It responds quickly and accurately to the concentration of hydrogen gas to ensure that it can remind you in time when danger occurs. Therefore, it can be widely used in hot, cold, humid, Dirty or harsh environment, to ensure that dangerous gases can be detected in an unfavorable working environment and prompt the operator to take precautions in time.