Feature: 1. Integrated Sensing Type: This sensor is an all in one air quality module with integrated dust sensor, infrared CO2 sensor, electrochemical formaldehyde sensor, VOC sensor, temperature and humidity sensor. 2. Accurate Measuring: This sensor can accurately measure the concentration of various gases, with UART (TTL level) communication interface, which makes the use more accurate. 3. Stable Performance: 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. 4. Simultaneous Output: This sensor can get the simultaneous output of carbon dioxide, formaldehyde, TVOC, PM2.5, PM10, temperature, humidity, a total of seven groups of data, powerful function. 5. Wide Application: 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 Product Model: M702 U Output mode: UART protocol CO2 measurement range: 400ppm-5000ppm CO2 measurement accuracy: ±25% CO2 measurement resolution: 1ppm CH2O measurement range: 0ug/m³-1000ug/m³ CH2O measurement accuracy: ±25% CH2O 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 socket Working current: ≤80mA Working temperature: 0℃-50℃ Working humidity: ≤95%RH Preheating time: 2 minutes (only CO2, CH2O 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