{"product_id":"rs485-voc-nox-temperature-and-humidity-sensor","title":"RS485 VOC, NOx, Temperature and Humidity Sensor","description":"\u003cp\u003e\u003cstrong\u003eThe RS485 VOC, NOx, Temperature \u0026amp; Humidity Sensor (S-AQI-01A) combines VOC and NOx monitoring with temperature, humidity and dew point measurements, providing real-time indoor air quality data over RS485 Modbus RTU.\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eThe \u003ca href=\"\/collections\/seeed\" title=\"Seeed Products\"\u003eSeeed\u003c\/a\u003e \u003cstrong\u003eRS485 VOC, NOx, Temperature \u0026amp; Humidity Sensor\u003c\/strong\u003e (S-AQI-01A) is a \u003cstrong\u003ecompact multi-parameter air quality sensor\u003c\/strong\u003e designed for indoor environment monitoring.\u003c\/p\u003e\n\u003cp\u003eBuilt with the \u003cstrong\u003eSensirion SGP41 sensor\u003c\/strong\u003e, it accurately measures VOC and NOx indexes while providing temperature, humidity, and dew point readings for comprehensive air quality analysis.\u003c\/p\u003e\n\u003cp\u003eWith 1-second measurement updates, the \u003ca href=\"\/collections\/adafruit-sensors\" title=\"Sensors\"\u003esensor\u003c\/a\u003e provides \u003cstrong\u003ereal-time air quality data\u003c\/strong\u003e for monitoring and control systems. It supports \u003cstrong\u003eRS485 Modbus RTU communication\u003c\/strong\u003e and a wide \u003cstrong\u003e5-28 V DC power input\u003c\/strong\u003e, making it easy to integrate into air purifiers, HVAC systems, and other smart environmental monitoring solutions.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eIP50 wall-mounted enclosure\u003c\/strong\u003e supports flexible installation, while built-in surge, reverse polarity, TVS, and ESD protection ensure stable operation in various applications. Ideal for indoor air quality monitoring, scientific research, laboratories, warehouses, cold chain facilities, and demand-controlled ventilation systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note\u003c\/strong\u003e that this sensor is designed for indoor use and is \u003cstrong\u003enot suitable for direct outdoor installation\u003c\/strong\u003e. The IP50 enclosure provides protection against dust and is \u003cstrong\u003enot waterproof\u003c\/strong\u003e, please avoid exposure to rain, water splashes, or high-moisture environments.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive Indoor Air Quality Monitoring\u003c\/strong\u003e: 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Accuracy with Configurable Calibration\u003c\/strong\u003e: 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible RS485 System Integration\u003c\/strong\u003e: 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Power Design for Flexible Deployment\u003c\/strong\u003e: 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoRaWAN® Connectivity with SenseCAP S2100:\u003c\/strong\u003e SenseCAP S2100 Data Logger can connect to Modbus RS485\/Analog\/GPIO industrial sensors including the Grow Your Idea and transmit data from sensors to the LoRaWAN network. Benefiting from its high robustness and waterproof and dustproof enclosure, the S2100 data logger can work under harsh environments such as high UV exposure, heavy rain, dusty conditions, etc. With built-in Bluetooth, it enables quick setup and OTA updates via the mobile app. It can be battery-powered or connected to a 12V external power supply. When the 12V power supply is connected, the replaceable built-in battery is used as a backup power supply, supporting lower power consumption.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eS-AQI-01A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRS485, Modbus-RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDefault Serial Communication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSlave address: 1;\u003cbr\u003ebaud rate: 9600 bps;\u003cbr\u003edata bits: 8;\u003cbr\u003estop bits: 1;\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5–28 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eQuiescent: \u0026lt;5 mA @12 V DC\u003cbr\u003eMax: \u0026lt;10 mA @12 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40–80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–95% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIP Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSensor body: 111 * 25.5 mm (Length * Diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement Specifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVOC Index\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1–500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNOx Index\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1–500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Measurement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40–125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±0.2°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.01°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNote\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLong-term operating temperature range: -40–80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHumidity Measurement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–100% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.8% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.01% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDew Point Measurement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-100–125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupplier Code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100089706\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/files.seeedstudio.com\/products\/100089706\/RS485%20VOC,%20NOx,%20Temperature%20and%20Humidity%20Sensor(S-AQI-01A)%20User%20Manual.pdf\" rel=\"noopener\" title=\"User manual\" target=\"_blank\"\u003eUser manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.seeedstudio.com\/media\/catalog\/product\/1\/0\/100089706-spec_img_1.png\" rel=\"noopener\" title=\"Wiring diagram image\" target=\"_blank\"\u003eWiring diagram image\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x RS485 VOC, NOx, Temperature and Humidity Sensor\u003c\/li\u003e\n\u003cli\u003e1x Mounting bracket\u003c\/li\u003e\n\u003cli\u003e2x Plastic screws\u003c\/li\u003e\n\u003cli\u003e2x Metal screws\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Seeed","offers":[{"title":"Default Title","offer_id":56151624515969,"sku":"106955","price":95.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/rs485-voc-nox-temperature-and-humidity-sensor-seeed-106955-1255404769.jpg?v=1787316517","url":"https:\/\/thepihut.com\/products\/rs485-voc-nox-temperature-and-humidity-sensor","provider":"The Pi Hut","version":"1.0","type":"link"}