PM2.5 Concentration emoticons
Concentration
(μg/m
3
)
Emoticon
Backlight
Concentration
(μg/m
3
)
Emoticon
Backlight
0-35
Excellent
White
116-150
Middle level
pollution
Red
36-75
Good
White
151-250
Serious pollution
Red
76-115
Light
pollution
White
251-500
Bad pollution
Red
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.
