In some vodik sulfid plin okolina, the application of vodik sulfid detektori can not only detect the koncentracija of vodik sulfid, but also alarm the koncentracija of vodik sulfid in the environment and take corresponding safety protection measures in advance. So, do you know the working principle of hydrogen sulfid detektori?
Working princip of vodik sulfid plin detektor:
The vodik sulfid plin detektor uses uvezeno original amperometrijski elektrokemijski senzori, obično konsifying of three electrodes immersed in an electrolyte. The working electrode is made by coating a metal with catalit activity on a breathable but hydrophobic membrane. The measured gas undergoes electrochemical oksidacija or oksidacija reakcija kroz a porozna membrana, i nje reakcija karakteristike depend on the termoelektrične potencijal of the working elektrode and the electrochemical (oksidacija or recovery) karakteristike of the analiziran plin.
In electrochemical reactions, participating electrons flow into (recover) or out (oxidize) the working electrode. The working signal of the working electrode is amplified by U2 to become the output signal of the device. The circuit maintains the voltage of the working electrode at the bias VBIAS value. The standard electrode provides a stable potential for the working electrode in the electrolyte.
After comparing the standard electrode potential with VBIAS, the output voltage signal of U1 exactly produces the same current signal as the working electrode. At the same time, the circuit maintains a constant potential difference between the working electrode and the reference electrode. The measuring electrode is only the second electrode required for a complete electrochemical sensor, and its main function is to allow electrons to enter or exit the electrolyte.
