The SO₂ Air Quality Sensor with Modbus RS485 is a high-precision gas detection module designed for continuous monitoring of Sulphur Dioxide (SO₂) in the environment. Featuring an electrochemical sensing element and digital signal processing, it delivers accurate readings with excellent stability and low cross-sensitivity. The Modbus RTU communication ensures long-distance, interference-free data transmission, making it ideal for industrial emission monitoring, environmental stations, and air quality monitoring systems.
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Gas Detected: Sulphur Dioxide (SO₂)
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Measurement Range: 0–20 ppm / 0–100 ppm (customizable)
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Resolution: 0.01 ppm
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Accuracy: ±2% F.S.
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Sensor Type: Electrochemical
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Output Interface: RS485 Modbus RTU
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Response Time (T90): ≤30 seconds
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Operating Voltage: 5–24V DC
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Power Consumption: ≤0.5 W
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Operating Temperature: -20°C to +50°C
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Humidity Range: 15–90% RH (non-condensing)
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Expected Lifespan: ≥2 years (in clean air)
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