CYH25 oxygen portable meter Product Description 

 The tester uses advanced ultra-low power microcontroller 
 Automatic zero adjustment menu calibration, user-friendly 
 128 × 64 dot matrix LCD 
 Friendly Chinese interface 
 Automatically record alarm information 
 Manually record any time measurement data 
 Embedded real-time clock and thermometer 
 Adjustable alarm points 
 Battery voltage tips 
 Replaceable modular sensor 
 Power-on self-test function 
 Applications: Fire, limited space detection, municipal, chemical, gas 

 CYH25 oxygen portable instrument performance characteristics 

 Measuring range: 0 to 25.0% 
 Alarm point: 0 ~ 25.0% O2 continuously adjustable (factory setting 18.0% O2) 
 Response time: T ≤ 60s 
 Indicate way: 128 x 64 dot matrix LCD display real-time data, menu and system status 
 The light-emitting diode and audible alarm, fault tips and undervoltage instructions 
 Working environment: temperature 0 ℃ ~ 40 ℃; 
 Humidity ≤ 98% RH 
 Atmospheric pressure: 86kPa ~ 110kPa 
 Operating voltage: DC3.7V 
 Operating Current: ≤ 110mA 
 Battery Type: Lithium Battery 
 Battery capacity: 1500mAh 
 U0: 4.3V 
 I0: 3.1A 
 Charging time: 4h ~ 6h 
 Sensor life: 2 years 
 Weight: about 140g (including battery) 
 Dimensions: 60.5mm × 26.5mm × 109mm