Feature: 1. Integrated Sensing Module: This sensor is an all in one air quality module with integrated laser dust sensor, infrared CO2 sensor, electrochemical formaldehyde sensor, VOC sensor, temperature and humidity sensor. 2. Accurate Measurement: This sensor can accurately measure the concentration of various gases, with UART (TTL level) communication interface, which makes the use more accurate. 3. Simultaneous Output: This sensor can achieve simultaneous output of carbon dioxide, formaldehyde, TVOC, PM2.5, PM10, temperature, humidity, a total of seven groups of data, powerful function. 4. Stable Data: High sensitivity and stable data. Temperature is accurate to 0.01℃, humidity is accurate to 0.04%, and seven sets of sensor monitoring data are automatically output through UART signal every 2 seconds. 5. Widely Use: This sensor can be used in gas detectors, air conditioners, air quality monitoring, air purifiers, HVAC systems, smart homes or other IAQ systems. Specification: Item Type: Sensor Module Model: M702B 485 Output Mode: 485 protocol CO2 Measurement Range: 400ppm-5000ppm CO2 Measurement Accuracy: ±25% CO2 Measurement Resolution: 1ppm CH20 Measurement Range: 0ug/m³-1000ug/m³ CH20 Measurement Accuracy: ±25% CH20 Measurement Resolution: 1ug/m³ TVOC Measurement Range: 0ug/m3-2000ug/m³ TVOC Measurement Accuracy: ±25% TVOC Measurement Resolution: 1ug/m³ PM2.5 Measurement Range: 0ug/m3-999ug/m³ PM2.5 Measurement Accuracy: ±10% PM2.5 Measurement Resolution: 1ug/m³ PM10 Measurement Range: 0ug/m3-1000ug/m³ PM10 Measurement Accuracy: ±10% PM10 Measurement Resolution: 1ug/m³ Temperature Measurement Range: -40℃-100℃ Temperature Measurement Accuracy: ±0.3℃ Temperature Measurement Resolution: 0.01℃ Humidity Measurement Range: 0-100% Humidity Measurement Accuracy: ±3%RH Humidity Measurement Resolution: 0.04% Physical Interface: XH2.54 female chassis Working Voltage: 5.0VDC Working Current: ≤80mA Working Temperature:0℃-50℃ Working Humidity: ≤95%RH Preheating Time: 2 minutes (only CO2, CH20 and TVOC need to be preheated, other parameters can be displayed by power on) Service life: 5 years (in air) . Package List: 1 x Sensor Module1 x Data Cable