Analysis of the Working Principle of Hydrogen Sulfide Gas Detectors
Correctly grasping the working principle of hydrogen sulfide gas detector can help everyone understand and treat it correctly. Next, we will provide a detailed interpretation of the working principle of hydrogen sulfide gas detector.
The hydrogen sulfide gas detector adopts imported original Ampere type electrochemical sensors, usually consisting of three electrodes immersed in electrolyte. The working electrode is made by coating a metal with catalytic activity on a breathable but hydrophobic membrane. The measured gas diffuses through a porous membrane and undergoes electrochemical oxidation or reduction reactions on it. The nature of the reaction depends on the thermodynamic potential of the working electrode and the electrochemical (oxidation or reduction) properties of the analyzed gas.
Electrons involved in electrochemical reactions flow into (reduce) or out (oxidize) the working electrode. The working signal of the working electrode is amplified by operational amplifier U2 to become the output signal of the instrument. The circuit simultaneously maintains the voltage of the working electrode at its bias voltage VBIAS value. The reference electrode provides a stable potential for the working electrode in the electrolyte After comparing the potential of the reference electrode with VBIAS, the output voltage signal of operational amplifier U1 is exactly the same in magnitude as the current signal generated by 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.
The above is an analysis of the working principle of the hydrogen sulfide gas detector. Everyone must actively grasp it. Of course, after mastering the working principle of the hydrogen sulfide gas detector, you must also purchase the product through professional channels.
