This product adopts infrared light source and dual channel thermopile detector to process the measurement and reference signals, and to compensate the temperature. Even under the harsh temperature and environmental conditions, it can also obtain stable and reliable measurement results. It has nice selectivity, high sensitivity, no oxygen dependence and long life. Features: Infrared carbon dioxide sensor, using NDIR infrared absorption detection principle, no oxygen dependence. High sensitivity, quick response and high resolution. Support a variety of output forms, outstanding linear output. With temperature compensation, high stability. Long service life and low power consumption. Anti water vapors interference, more stable. 24 hours automatic calibration. Specifications: Material: plastics Measurement range: 0-5000ppm (default) Measurement resolution: 1ppm Measurement accuracy: 50ppm or ± 5% F.S (25 ) Response time: < 30s (25 ) Preheating time: < 1min (25 ) Accuracy: < 5min (25 ) Working voltage: 5V Direct Current Average power consumption: < 60mA Working humidity: 0~95% RH (non condensation) Working temperature: - 10~60 ; factory default temperature compensation ranges: 0~50 Item size: 26 * 58mm / 1.0 * 2.3in Item weight: 100g / 3.5ounce Package size: 200 * 100 * 50mm / 7.9 * 3.9 * 2.0in Package weight: 150g / 5.3ounce Package List: 1 * Carbon Dioxide Sensor Module