CO7701 Carbon Monoxide CO Digital Meter Tester Monitor Detector, 0~999 ppm Range, CE Marking, Handheld Pocket Type

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This low-cost pocket-type meter checks the existence or concentration of CO in the environment and displays the reading in ppm. 

A beeping alarm will be heard when exposure safety limit exceeds. Preset at 25ppm but can be adjusted per user preference.

Top design housing, surround with rails to help air ventilation for a quick and accurate response. In addition, it can auto-calibrate at 0ppm or manually calibrate at 100ppm/500ppm carbon monoxide standard gas.


  • Dual display: Current CO & Max CO value 
  • Auto zero and Auto/Manual calibration 
  • 2-point CO calibration 
  • Reduced influence of Various interference gasses 
  • Low battery indicator 
  • Backlight
  • Auto/Manual power off
  • Selectable °C/°F
  • Self-Test Function after power on, testing the sensor and circuit condition 
  • Overflow and underflow value indication 
  • 100% certified safe, with EU international standard for health and safety 
  • With CE marking which ensures safety 



  • Measuring Range: 0~999ppm
  • Accuracy: ±20% at 0~100ppm
    • Accuracy ±15% at 101~500ppm
    • Accuracy (at 20±5°C , 50±20%RH)
  • Resolution: CO2 (1ppm) / Air Temp. (0.1°C / 0.1°F) / Air RH% (0.1%RH)
  • Response Time: within 60sec
  • Working Environment
    • Temperature: -10 ~ 60°C
    • Humidity: 5~99% RH (no condensation)
  • Storage Environment
    • Temperature: -40 ~ 70°C
    • Humidity: 0~95%RH (avoid condensation)
  • Power Supply: 3 x AAA alkaline batteries
  • Power Supply: (about 250hrs when backlight is off and 35hrs backlight is on)
  • Dimension: 175 x 47 x 28mm
  • Weight: approx. 120g


Set Includes :

  • 1x Carbon Monoxide CO Meter
  • 3 x AAA alkaline batteries
  • 1 x English Instruction Manual
  • 1 x Wrist Strap
  • 1 x Carrying Pouch

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