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 ModuleModel: M702B 485Output Mode: 485 protocolCO2 Measurement Range: 400ppm-5000ppmCO2 Measurement Accuracy: 25%CO2 Measurement Resolution: 1ppmCH20 Measurement Range: 0ug/m-1000ug/mCH20 Measurement Accuracy: 25%CH20 Measurement Resolution: 1ug/mTVOC Measurement Range: 0ug/m3-2000ug/mTVOC Measurement Accuracy: 25%TVOC Measurement Resolution: 1ug/mPM2.5 Measurement Range: 0ug/m3-999ug/mPM2.5 Measurement Accuracy: 10%PM2.5 Measurement Resolution: 1ug/mPM10 Measurement Range: 0ug/m3-1000ug/mPM10 Measurement Accuracy: 10%PM10 Measurement Resolution: 1ug/mTemperature Measurement Range: -40-100Temperature Measurement Accuracy: 0.3Temperature Measurement Resolution: 0.01Humidity Measurement Range: 0-100%Humidity Measurement Accuracy: 3%RHHumidity Measurement Resolution: 0.04%Physical Interface: XH2.54 female chassisWorking Voltage: 5.0VDCWorking Current: 80mAWorking Temperature:0-50Working Humidity: 95%RHPreheating 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