In the fields of industrial production and environmental monitoring, the accurate and reliable detection of sulfur dioxide (SO₂) is crucial as it is a common harmful gas. It not only affects production safety but also directly relates to environmental protection and human health. Traditional detection methods are often limited by accuracy, stability, or interference resistance, making it difficult to maintain consistent performance under complex operating conditions. Today, we recommend Tensensor's high-performance electrochemical sulfur dioxide sensor—MQ-E3-SO₂—which redefines the standard for industrial-grade SO₂ detection with its superior technical performance and robust design.

MQ-E3-SO2 Electrochemical SO2 Sensor

    Precise Sensing, Intelligent Analysis: 

    The MQ-E3-SO₂ sensor employs a constant-potential electrolysis principle. It generates current through a redox reaction between sulfur dioxide and oxygen on the working and counter electrodes. The current magnitude is directly proportional to the gas concentration, thus achieving precise measurement. Its measurement range covers 0-20 ppm, with a resolution of up to 0.1 ppm and a response time of <30 seconds. It maintains excellent stability and linear output over a wide temperature range of -20℃ to 50℃, ensuring real-time and reliable data support in various industrial environments.

    Rugged Core, Unaffected by Interference: 

    The complex gas composition in industrial environments makes cross-interference one of the main challenges for sensors. The MQ-E3-SO₂ exhibits excellent anti-interference capabilities, showing extremely low response to many common gases such as carbon monoxide, hydrogen sulfide, chlorine, and hydrogen. It maintains stable readings even in the presence of volatile organic compounds such as formaldehyde, benzene, and methanol, significantly reducing the risk of false alarms and ensuring the reliability of the monitoring system.

    Long-Term Protection, Worry-Free Maintenance: 

    The sensor design balances durability with low maintenance requirements. Its lifespan is up to 2 years (in air), with monthly stability <2% and repeatability error <2%, maintaining consistent performance even under drastically fluctuating operating conditions. Furthermore, the sensor features a built-in waterproof and breathable membrane, supporting stable operation within a humidity range of 15%~90%RH, adapting to various industrial environments.

    Safe Design, Intelligent Protection

    The MQ-E3-SO₂ embodies a rigorous safety philosophy in its structural design and usage specifications: prohibiting soldering installation, avoiding mechanical impact, preventing electrolyte leakage, and eliminating contact with organic solvents, among other protective measures, ensuring the sensor's safety and reliability throughout transportation, installation, and use. The recommended load resistance is only 10Ω, and the circuit design is simple, easily integrated into various monitoring systems.

    Widely Applicable, Enabling Multiple Scenarios

    This sensor is suitable for multiple fields such as chemical engineering, metallurgy, environmental monitoring, flue gas analysis, and indoor air quality detection. Whether in fixed monitoring stations, portable detectors, or process control systems, the MQ-E3-SO₂ provides stable and sensitive SO₂ sensing capabilities.

    Under the dual requirements of industrial intelligence and green development, choosing a reliable gas sensor is not only an investment in technology but also a commitment to safety, environmental protection, and responsibility. The MQ-E3-SO₂ sulfur dioxide sensor, with its core advantages of high precision, strong anti-interference, and long lifespan, provides you with "invisible protection," making every breath of industrial air clearly measurable and safely controllable.

For more technical details or application support, please contact us:

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