Sensor:  electrochemical carbon monoxide sensor(Japanese sensor)
Detecting range:  0~999PPM*
Sensitivity:  5PPM
Error:   +/-10%
(The detecting precision is effected by detector itself and the temperature and humidity of the installation environment.
The best installation environment: 20C+/-5C; Relative humidity 50%+/-3%; Air pressure +/-10%. )
Numerical readings and notes:  3-digit LCD display of levels
Normal reading:  0
Alarm readings:  30~999PPM
Battery capacity display:  full, OK, low, dead
Sensor performance display:  malfunction
Alarm mode:  sound: Beep, hummer
Light:  red LED flashing
Installation:  Wall mounted
Power supply: 110VAC( ) 220VAC( ) 230VAC-240VAC( )
Backup battery:  1X9v( ) 1 X12v( )
Working temperature:  0~+60C
Relative humidity:  < 98%
Static current: <0.3MA
Alarm current: <100MA