Hydrogen sulfide detectorIt is a commonly used detection instrument used to monitor the concentration of hydrogen sulfide gas in the ambient air. It has the advantages of stable performance, flexible use, and easy maintenance.
Working principle of hydrogen sulfide detector:
The 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.
Hydrogen sulfide detectorProduct Features:
*Fast response time
*The hydrogen sulfide detector is easy to operate and has stable performance
*LCD display, direct reading
*The hydrogen sulfide detector has reliable performance and does not require frequent maintenance
*Sound and light alarm, easy calibration
*The hydrogen sulfide detector is small in size and easy to carry
*The instrument and probe are separated and can be detected online, with fixed readings
Hydrogen sulfide detector. Method for detecting hydrogen sulfide:
There are several methods to discover hydrogen sulfide gas. The nose can detect the presence of hydrogen sulfide gas, which is one millionth of its concentration, in the air In there. But when the concentration of hydrogen sulfide reaches 4.6ppm, it will dull the human sense of smell. If the concentration of hydrogen sulfide in the air exceeds 100ppm, the sense of smell will quickly become dull, leading to an unreliable judgment that the air does not contain hydrogen sulfide. Therefore, determining the presence of hydrogen sulfide based on the olfactory organ is extremely unreliable and dangerous, and measurement should be usedHydrogen sulfide detectorTo determine the presence and content of hydrogen sulfide.
