Features CO2 Gas Sensor: The gas detection module can test the CO2 to ensure timely understanding of the gas content in the work environment. Great Accuracy: Comes with 0-10000ppm measurement range, the CO2 gas sensor also enables stable data transmission with high accuracy. Quick Response: Fast in response, this sensitive CO2 detection sensor with TTL signal output can give you reliable testing results. Stable Outputs: Designed to have DO TTL output and AO signal output, the air quality sensor module will largely simplify the analysis. Easy to Install: Light in weight and compact in size as well, the gas detection sensor is very convenient to install within minutes. Specification: Item Type: CO2 Sensor Module Input Voltage: DC 5V, 24V maximum. Power Consumption and Current: 150mA DO Output: TTL digital quantities 0 and 1, 0.1V and 5V. AO Output: Analog Level Signal Detection Range: 0-10000ppm Working Temperature: -10~50℃, 20℃ nominal temperature. Humidity: 95%RH, 65%RH nominal humidity.  Package List:1 x CO2 Sensor Module Note:1. After the sensor is powered on, it needs to be preheated for about 20s to stabilize the measured data. Heating the sensor is normal since there is an electric heating wire inside, and if it is hot, it is considered abnormal.2. Avoid long term exposure to harsh environments. Whether the sensor is powered on or not, prolonged exposure to adverse environments such as high humidity, high temperature, and high pollution can seriously affect the performance of the sensor. Package List 1 x CO2 Sensor Module