Gas detector of Oxygen
Measurement display: displays 4 digit LCD
Operation temperature：-10～40℃ (14～104°F)
Storing temperature: 0～30℃ (32～86°F)
Operation humidity: 0～99%RH (relative humidity)
Storing humidity: 20%～80% RH (relative humidity)
Measuring range: 0～25%(VOL)
Resolution: 0.1 %( VOL) 
Measurement error: ±0.5%
Over measurement range display: --OL--
Alarming method: acousto-optic alarming
Working principle of the sensor: source cell sensor
The service life of the sensor: 2 years (it can then be replaced)
Power supply: 3×1.5V AAA alkaline batteries
Battery service life: about 100 hours of continuous use (when the backlight is off).
Size: 172×51×26 (mm)