大约20小时（声、光、振动持续报警）
450/455 has superior performance, can use up to 10 kinds of sensor, including oxygen, carbon monoxide, hydrogen sulfide, sulfur dioxide, ammonia, chlorine, hydrogen cyanide, nitrogen dioxide, nitric oxide, hydrogen. Simple operation, users can manually to zero and calibration,convenient and quick. And maintenance free detectorcannot machine is different, the user can always switch,batteries and sensors can also easily be replaced.
Main features
Long service life, can replace the sensor and battery
The sensor can be calibrated, improve reading reliability
Non slip rubber shell, anti drop impact
The sound and light alarm, vibration alarm (optional)
High contrast display real-time readings, clear and easy to read
Authentication
China metrological instrument type approval certificate
Intrinsically safe
The European ATEX certification ATEX-II 2G EEx IA IIC T 4
Product specifications
Dimensions: 9.3 x 4.3 x 2.8cm
Weight: 156g
Sensor: electrochemical sensor
Relative humidity range: 15~95% RH (non - condensing)
Operating temperature: -20~50 ℃
1 Reading: real time reading:
Warning: super pre reading alarm
Alarm indicator light flashes red:: LED; acoustic: beep85dB; vibration: built-in vibrator (optional)
Battery life: about 18 months (40 hours per week)
About 20 hours (sound, light, vibration continuous alarm)
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