Hydrogen sulfide gas detectorIt is a specialized method for monitoring hydrogen sulfide (H) in the environment2S) Gas concentration safety equipment is widely used in various fields such as petroleum, chemical, metallurgy, coal mining, environmental protection, and laboratories, and is of great significance in ensuring personnel safety and preventing accidents.
Detection principle:
Electrochemical principle: The current signal is generated through the oxidation-reduction reaction between hydrogen sulfide and the electrode, which has high sensitivity and fast response. It is suitable for long-term continuous monitoring, but the electrolyte needs to be replaced regularly.
Semiconductor principle: The principle of using metal oxide semiconductor materials to adsorb gas and change resistance, which is low-cost but susceptible to temperature and humidity interference.
Principle of photoionization (PID): By detecting gas molecules through ultraviolet light ionization, it is effective for detecting extremely low concentrations of hydrogen sulfide, but the equipment is expensive and requires frequent calibration.
Infrared absorption principle: Quantify hydrogen sulfide by analyzing the absorption intensity of specific wavelength infrared light, suitable for high temperature and high humidity environments, but with a large volume.
Hydrogen sulfide gas detectorCharacteristics:
High measurement accuracy: For example, an online hydrogen sulfide gas detector can achieve a detection accuracy of ± 3% and a linear error of ≤± 1%.
Diverse signal outputs: available in 4-20mA, RS485, 0-5V and other signal output modes, compatible with various secondary meters, PLCs, DCS systems, etc., and capable of wired or wireless remote transmission.
Good protective performance: usually has explosion-proof, anti-corrosion, dustproof and other characteristics, high protection level, suitable for various harsh environments.
Easy to operate: Some instruments come standard with infrared remote controls, which can be operated without opening the cover in dangerous situations, allowing for alarm point modification, concentration calibration, and other operations.