CF-9A Portable Air Quality Monitor For AQI, PM2.5, PM10, CO2, Temp and Humidity,With Buzzer Alarm

Monitoring Carbon Dioxide by 9A Indoor Air Quality Monitor This indoor air detector, equipped with the latest Non-dispersive Infrared (NDIR), can respond quickly and monitor the carbon dioxide concentration in indoor air. In addition to the NDIR chip, this indoor air detector also has a PM2.5PM10 chip. It can detect particles in the air with a diameter of 2.5μm and 10μm. In addition, this indoor air detector can also calculate the Air quality index （AQI）value based on the relevant data of indoor air quality.The AQI range is 0-500, when the AQI value over 100, we need to pay attention to the indoor air quality, open the windows for ventilation or turn on the air purifier. What We Measure: PM 10 & Humidity Using a nationwide network of monitoring sites, EPA has developed ambient air quality trends for particle pollution, also called Particulate Matter (PM). PM10 describes inhalable particles, with diameters that are generally 10 micrometers and smaller. Under the Clean Air Act, EPA