BRWISSEN A17 Air Quality Monitor Indoor Co2 Meter PM1.0 PM2.5 PM10 Particulate Matter Data Export PM 0.3,0.5,1.0,2.5,5.0,10 NDIR Carbon Dioxide Sensor Laser Particle Counter Record Storage - BRWISSEN TECH, PM+CO2+Particle number+Data Storage

• CO2 SENSOR SELF CALIBRATE -- NDIR Non-Spectral Infrared CO2 Carbon Dioxide Sensor, Absorption chamber Optical Coating. With 48 hours automatic baseline calibration function, continuous measurement over 48 hours automatic calibration. Service life is 8 to 15 years PM PARTICULATE MATTER DETECT -- Indoor Air quality monitor with Laser particle sensor that can test tiny fine particles pollution. 6-channel particle counter (Number of particles/liter)--pm0.3 / pm0.5 / pm1.0 / pm2.5 / pm5.0 / pm10. 3-channel particulate matters quality detection (μg/m³)--PM1.0 / PM2.5 / PM10. Press and hold the SET button for 3s to enter Settings page DATA LOGGER & DATA EXPORT-- Air quality CO2 meter has a 128M data memory card that storage 100K+ data records (can support up to 8G memory). Data storage frequency: once a minute. Data records can be exported to the computer in TXT file and analyze air quality changes in graphs. History can be directly queried on the machine AUTOMATIC PHOTOSENSITIVE -- A17 air quality tester automatically turns off the screen according to the ambient brightness, creating a good sleeping environment, saving energy and electricity. Can turn off this function in settings page 3000mAh BATTERY & ALARM-- Portable air quality Co2 detector with touch button and 3000mAh rechargeable battery, automatic detection at start-up, drawing 24hours data change curve. AQI air quality alarms base on US standards, alarm sound can be turned off in settings page, Weight: 0.57761112644 Pounds, Manufacturer: BRWISSEN TECH