Hydrogen sulfide, a highly toxic and corrosive gas in industrial production, is widely present in mining, petrochemical, wastewater treatment, and environmental monitoring environments. It not only seriously threatens the health and lives of workers but also corrodes equipment and pipelines and pollutes the environment. Accurate, stable, and sensitive gas detection has become an essential requirement for industrial safety. Tensensor's MQ-E3-H2S electrochemical hydrogen sulfide sensor, with its core electrochemical technology advantages, has become the benchmark choice for hydrogen sulfide detection in the industrial field.

    Core Technology Principles, Forging Powerful Detection Capabilities

    MQ-E3-H2S employs the constant potential electrochemical principle. Relying on the redox reaction between the working and counter electrodes, hydrogen sulfide and oxygen undergo charge conversion, generating a current signal that is precisely proportional to the gas concentration. By capturing minute current changes, the hydrogen sulfide concentration can be quickly and accurately calculated, achieving reliable detection of trace gases at the source. Compared to traditional detection elements, it possesses unparalleled technological advantages.

    Multi-dimensional Advantages, Adaptable to Complex Industrial Scenarios

    High Precision and High Sensitivity, No Trace Concentrations Can Hide

    The sensor comes standard with a 0~100ppm measurement range, a maximum measurement limit of 500ppm, and a resolution as low as 0.1ppm, capable of detecting extremely small amounts of hydrogen sulfide leaks. Sensitivity is stable at (0.8±0.15)μA/ppm, with precise and controllable numerical output, eliminating missed and false detections.

    Rapid Response Output, Seizing the Early Warning Opportunity

    The T90 has a response time of less than 30 seconds, quickly sensing fluctuations in hydrogen sulfide concentration in the environment and promptly transmitting early warning signals, allowing ample time for on-site emergency response and adapting to the needs of real-time online industrial monitoring.

    Strong Stability and Anti-interference, Stable Operation in Complex Environments

    Monthly stability <2%, repeatability error less than 2% of output value; zero-point drift ≤0.2ppm within a wide temperature range of -20℃ to 40℃, exhibiting extremely strong temperature and humidity adaptability. It also possesses excellent cross-interference resistance, with extremely low response values to more than ten common industrial interference gases such as carbon monoxide, chlorine, alcohol, and benzene, effectively avoiding detection deviations under complex operating conditions.

    Low Power Consumption, Durability, and Easy Adaptability, Cost Reduction and Efficiency Improvement

    It features built-in low power consumption, eliminating the need for redundant power supply configuration; a 10Ω load resistor is recommended, with a bias voltage of 0mV, making circuit construction simple and convenient. With a typical service life of up to 2 years in air, it can operate normally within a humidity range of 15%~90% and a pressure range of ±10% of standard atmospheric pressure, and is resistant to harsh environments such as industrial dust, humidity, and large temperature differences.

    Suitable for all industrial applications and adaptable to various scenarios.

    Based on its superior performance, MQ-E3-H2S hydrogen sulfide sensor is widely used in major core industrial fields:

    Mining: Real-time monitoring of hydrogen sulfide spillage concentration in mine roadways and working faces to mitigate the risk of poisoning from associated gas.

    Petrochemical: Used in refining units, oil and gas pipelines, and tank farms to detect gas leaks during production, processing, and storage.

    Environmental Protection and Sanitation: Suitable for wastewater treatment plants, landfills, and chemical industrial park boundaries to assist in online monitoring of odorous waste gas and ensure compliance with environmental emission standards.

    Municipal Utility Tunnels: Used for gas monitoring in enclosed spaces such as power and integrated utility tunnels to prevent safety accidents caused by hydrogen sulfide accumulation.

    Metallurgy, Pharmaceuticals, Paper Industry: Accurately monitors the concentration of by-product hydrogen sulfide in production processes, safeguarding workshop operations and equipment integrity.

    In today's increasingly stringent industrial safety regulations, choosing a reliable gas sensor is choosing a guarantee of safety. MQ-E3-H2S electrochemical hydrogen sulfide sensor, with its comprehensive advantages of high precision, high stability, strong anti-interference, and long lifespan, breaks through the limitations of traditional detection methods. It has become a core preferred component for online monitoring of industrial hydrogen sulfide, portable detectors, and fixed alarm equipment, building a solid first line of defense for industrial safety production and environmental.

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