The SO₂ Gas Sensor Module is a high-precision electrochemical sensor designed to detect Sulfur Dioxide (SO₂) levels in the environment. It offers excellent sensitivity, stability, and long-term performance, making it ideal for use in industrial safety, environmental monitoring, smart cities, and indoor air quality systems.
This module uses electrochemical detection principles to measure SO₂ concentrations in the air and provides analog or digital output options, such as UART or RS485 (Modbus). Its compact size and low power consumption make it easy to integrate into various control systems and IoT devices.
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Target Gas: Sulfur Dioxide (SO₂)
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Measurement Range: 0–20 ppm (varies by model)
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Detection Principle: Electrochemical
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Sensitivity: ±2% F.S.
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Response Time: ≤30 seconds
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Output Interface: UART / RS485 / Analog (0–5V or 4–20mA)
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Power Supply: 3.7V–5.0V DC
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Operating Temperature: -20°C to +50°C
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Operating Humidity: 15%–90% RH (non-condensing)
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Signal Stability: ≤ ±2% of reading per month
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Expected Sensor Life: ≥2 years in clean air
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Typical Applications:
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Industrial emissions monitoring
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Air purifiers and gas detectors
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Smart city environmental nodes
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Laboratory and research systems
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HVAC and indoor safety monitoring
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