EXTECH CO50 Desktop Carbon Monoxide Monitor


Price $259.99
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Extech Test & Measurement

Measures Carbon Monoxide concentration, Air Temperature and Humidity

The CO50 is a desktop CO Monitor which measures and displays carbon monoxide concentration, air temperature and humidity simultaneously. The CO50 features visibly bright LED lights which indicate active monitoring (green) or a surpassed CO alarm threshold (red). The meter also features an extra loud audible beeper alarm, electrochemical CO sensor, record/recall Max reading for CO concentration and CO calibration function in fresh air. Product is complete with Universal AC adapter (100V-240V) with multiple plug types (US, EU, UK, AUS) and a user's manual.


  • Simultaneously displays Carbon Monoxide (CO) concentration, Air Temperature, and Relative Humidity readings with date (Year, Month, Day) and time
  • Visibly bright LED indicates active monitoring (green) or surpassed CO alarm threshold (red)
  • Extra loud audible beeper alarm level meets UL 2013 Standard (>85dB @ 3 meters); default alarm threshold at 30ppm (user adjustable)
  • Designed with Electrochemical CO sensor
  • Record/Recall Max reading for CO concentration
  • CO calibration function in fresh air
  • Internal memory for manually storing up to 99 readings with recall function
  • Complete with Universal AC adapter (100V-240V) and multiple plug types (US, EU, UK, AUS)


Range | Resolution | Basic Accuracy

  • Carbon Monoxide (CO): 0 to 999ppm | 1ppm | ±2ppm
  • Temperature (Air): 14 to 140°F (-10 to 60°C) | 0.1°F/°C | ±1.2°F/0.6°C
  • Relative Humidity: 10 to 90%RH | 0.1%RH | ±5%RH @ 25°C
  • Dimensions/Wt: 6.1 x 3.4 x 3.2" (155 x 87 x 81mm)/ 5.8oz (165g)