Hydrogen Sulfide (H2S) Gas Sensor, 0-50ppm~5000ppm

Hydrogen sulfide gas sensors operate as constant-potential electrolytic sensors. Hydrogen sulfide and oxygen undergo corresponding redox reactions at the working electrode and counter electrode respectively, releasing charges that generate an electric current. The magnitude of this current is directly proportional to the hydrogen sulfide concentration. By measuring the current intensity, the level of hydrogen sulfide concentration can be determined.

Common H2S sensor types primarily include electrochemical and semiconductor sensors. Electrochemical sensors offer high sensitivity and fast response, making them suitable for low-concentration environmental monitoring. Semiconductor sensors feature longer lifespans and are well-suited for industrial environments. Some high-end sensors integrate temperature compensation and digital interfaces to enhance accuracy and stability. Based on application requirements, they can also be categorized as portable or fixed, serving personal protection and long-term online monitoring in industrial sites respectively.

To ensure accuracy, hydrogen sulfide gas sensors require regular calibration and maintenance. Long-term use may introduce interference from temperature, humidity, dust, or oil vapors, affecting measurement results. Calibration is generally recommended every 6 months to 1 year, with shorter intervals possible depending on the field environment. Additionally, avoid using highly corrosive chemicals near the sensor and maintain adequate ventilation. Proper installation and maintenance extend service life and ensure reliable data.