Product Name: oxygen measuring device 

 Product Model: CYH-25 

 Coal safety sign: MFA030008 

 Description: 
 The product is a new generation of intelligent detector can continuously detect the presence of flammable, explosive flammable gas mixture in gas concentration. With audible and visual alarm, display voltage, undervoltage alarm, zero point automatic tracking adjustment, easy to use features. 

 The main technical indicators: 

 Item Specification 
 Measuring range from 0 to 25% 

 Error ≤ ± 3% 
 Sensor life> 24 months (import electrochemical) 
 Response time <20s 
 4 LED display 
 Alarm method intermittent audible and visual alarm, alarm points continuously adjustable 
 Intensity of sound level ≥ 80dB 
 Degree of protection IP54 
 Battery Pack Ni-Mh1800mAh × 3 
 Continuous work time> 7 days 
 Explosion-proof type Exib I 
 Dimensions 116 × 56 × 25mm 
 Weight 0.2kg 
 Equipment monomer combination charger