Feature:1. LONG TERM STABILITY: The stability of the NDIR CO2 sensor basically depends on the light source, and the long term stability of the NDIR is extremely excellent compared to other types of gas sensors when the light source is not abnormal2. WIDE RANGE OF MEASUREMENT CONCENTRATION: The working principle of the NDIR CO2 sensor is to detect the infrared energy of the infrared absorption band of the measured gas. The characteristic of the signal is that when there is no measured gas, the signal strength is maximum. The heavier the concentration, the smaller the signal, and the measured concentration can reach 5000PPM3. APPLICATION SCENARIO: Carbon dioxide sensor is suitable for air quality monitoring equipment, air purification equipment, fresh air system, HAVC system, car air purification, smart home4. STABLE AND RELIABLE: The CO2 concentration detection sensor has high sensitivity, low power consumption and good stability. The measurement interval is 2 seconds, and the self calibration cycle defaults to 7 days5. DURABLE MATERIAL: The CO2 gas sensor adopt ABS and metal material. Waterproof and corrosion resistant, possess long service life, provide great convenience for your lifeSpecification:Item Type: Carbon Dioxide SensorMaterial: ABS, metalMeasured Gas Type: CO2Measurement Principle: NDIRMeasuring Concentration Range: 400ppm-5000ppmMeasurement Interval: 2 SecondsMeasurement Accuracy: (50ppm +5% of reading)Response Time: 90 SecondsOperating Temperature Range: 0-50Operating Humidity Range: 0-90%RH (non condensing)Storage Temperature Range: -20-60Life Span: 10+ YearsCommunication Interface: Uart/CPWM Output: Period: 1004ms, Pulse: 2ms-1002ms (0-5000ppm)Alarm Output: Concentration >1000ppm, output 1, concentration <800ppm, output 0, pin is open leakage output mode, non sunctionSelf Calibration Period: The default self calibration period is 7 days.Package List:1 x Carbon Dioxide Sensor