- Comprehensive Indoor Air Quality Monitoring: Measures VOC index, NOx index, temperature, humidity, and dew point in a single device. The integrated Sensirion SGP41 MOX sensor provides reliable VOC and NOx index values for evaluating indoor air quality, while the built-in temperature and humidity sensing delivers additional environmental context essential for understanding overall air conditions.
- High Accuracy with Configurable Calibration: Provides both original and calibrated values for temperature, humidity, and dew point. Configurable temperature and humidity offset calibration allows users to compensate for installation-specific conditions and improve measurement accuracy in different environments.
- Flexible RS485 System Integration: Uses RS485 Modbus-RTU for reliable long-distance communication and supports multiple sensors on one bus. Configurable device address (0–255), baud rate (1200–38400 bps), parity, stop bits, and data format simplify integration with PLCs, data loggers, controllers, and monitoring systems.
- Low-Power Design for Flexible Deployment: The sensor operates on a wide 5–28V DC power supply with a quiescent current below 5 mA at 12 V DC, making it suitable for energy-efficient and battery-powered applications. The compact IP50 wall-mounted enclosure enables easy installation, while built-in reverse-polarity, surge, TVS, and ESD protection ensure reliable operation.
Note: Please note that this sensor is designed for indoor use and is not suitable for direct outdoor installation. The IP50 enclosure provides protection against dust and is not waterproof, please avoid exposure to rain, water splashes, or high-moisture environments.
Seeed also provides the SenseCAP Portal and SenseCraft to help users better manage and check data remotely.
| General Parameters | |
| Model | S-AQI-01A |
| Output Interface | RS485, Modbus-RTU |
| Default Serial Communication | Slave address: 1; baud rate: 9600 bps; data bits: 8; stop bits: 1; |
| Power Supply | 5–28 V DC |
| Power Consumption | Quiescent: <5 mA @12 V DC Max: <10 mA @12 V DC |
| Operating Temperature | -40–80°C |
| Operating Humidity | 0–95% RH, non-condensing |
| IP Rating | IP50 |
| Cable Length | 2 meters |
| Installation | Wall mounting |
| Dimensions | Sensor body: 111 * 25.5 mm (Length * Diameter) |
| Measurement Specifications | |
| VOC Index | |
| Range | 1–500 |
| Resolution | 1 |
| NOx Index | |
| Range | 1–500 |
| Resolution | 1 |
| Temperature Measurement | |
| Range | -40–125°C |
| Accuracy | ±0.2°C |
| Resolution | 0.01°C |
| Note | Long-term operating temperature range: -40–80°C |
| Humidity Measurement | |
| Range | 0–100% RH |
| Accuracy | 1.8% RH |
| Resolution | 0.01% RH |
| Dew Point Measurement | |
| Range | -100–125°C |
Wiring Diagram
- Air Purification Systems
- HVAC and Ventilation Systems
- Indoor Air Quality Monitoring
- Laboratory Environmental Monitoring
- Warehousing
- Science Research
| RS485 VOC, NOx, Temperature and Humidity Sensor | x1 |
| Mounting Bracket | x1 |
| Plastic Screw | x2 |
| Metal Screw | x2 |
| HSCODE | 9027100090 |
| USHSCODE | 9027894590 |
| UPC | |
| EUHSCODE | 9027109000 |
| COO |
Array
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