A25M (handheld) /A25D (benchtop) /A25F (benchtop) are air quality meters used to measure PM2.5 concentration. A25F can also measure formaldehyde concentration. PM2.5/Formaldehyde concentrations display diﬀerent emoticons on screen to help users visualize their environmental conditions.
A25M PM2.5 Meter Features
Precise PM2.5 concentration based on pre-calibrated sensors
Temperature measurement (°C/°F)
LCD backlight and red backlight alarm
Battery status, low power, auto power oﬀ