Product introduction Carbon dioxide is a key indicator of indoor air quality that impairs human cognitive ability and happiness. / is Sensirion&# s next generation micro carbon dioxide sensor, which has high precision and cost-effectiveness. The module uses 2.54mm spacing pin interfaces to lead out power and communication pins. On chip temperature and humidity compensation is achieved through built-in temperature and humidity sensors compatible with humidity and temperature measurement. / can achieve intelligent adjustment of indoor ventilation systems based on carbon dioxide concentration, and indoor air quality helps to maintain a healthy and efficient environment under low carbon dioxide concentration compatible with a period of time. feature Reference accuracy, specified range, :400-2000 ppm : 400-5000 ppm Power supply voltage range: 2.4-5. V High precision: ± (40 ppm+5%) Digital interface Integrated temperature and humidity sensors Low power operation to 0.4 mA average @ 5 V, 1 measure/ 5 minutes Interface definition: 1. : Power negative input port 2. : Power positive input port 3. : clock port 4. : data port Board size: 13.4 × 21.6mm can measure concentrations in the range from 400 to 5000 ppm. In addition to measuring , the can also measure temperature and humidity. The sensor communicates through an address and can be powered from 2.4V up to 5.5V. You can connect it to both or and duino Uno or Raspberry Pi. You can connect the module via a pin comb or our uŠup connector ( ). The module i