3. General specifications
a. Display: LCD screen
b. Working principle: laser scattering
c. Alarm: visual (red light)
d. Backlight: dual color LED backlight
4. Operation environment
a. For indoor/outdoor environment or vehicles
b. Altitude: ≤2000 s
c. Operating temperature: -10~50˚C
Operating humidity: 0~99% RH
d. Storage temperature: -20~60˚C
5. Precautions
a. When measuring, please take more than 10 minutes to obtain a stable value.
b. It is normal to have several digits difference at different locations within one space because
PM2.5 suspends unevenly in the air. Use the concentration grading emoticons to judge the
air quality.
c. When measuring, please do not use fan, hair dryer, fan heater, etc. to blow into device.
d. Do not block the air inlet and outlet.
e. When measuring the temperature and humidity, it takes 20~30 minutes for the device to
obtain the accurate value.
f. To avoid anomaly, please use the device under specified operation environment.
