Carbon Dioxide (CO2), Carbon Monoxide (CO) and Oxygen (O2) Handheld Detector

Carbon Dioxide (CO2), Carbon Monoxide (CO) and Oxygen (O2) Handheld Detector
Regular price $699.00

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The GasLab Plus CM-505 is a Multi-Gas Detector designed to measure carbon dioxide (CO2), carbon monoxide (CO) Oxygen (O2), relative humidity and temperature in a variety of applications. 

    With long-term data storage, the user can measure ambient gas levels by data displayed and gain indication by visual and audible alarm settings.


    • NDIR (CO2), EC (CO), and Fluorescence quenching by Oxygen (O2)
    • Measures RH% and Temperature
    • Large LCD display for easy readability 
    • Audible Alarm
    • Data Logging with 16 GB SD Card
    • Multiple Connected Units by RS485 interface
    • LCD Backlight for easy readability by dark
    • Li-ion rechargeable batteries


    • Food and Beverage
    • Brewing
    • Agriculture
    • Poultry
    • Cryogenics
    • Scientific
    • Medical
    • Safety, and many others.


      • Measures: CO2, CO, O2, PM2.5, PM10, Temp, RH%
      • Sensing method: NDIR, EC, and Fluorescence quenching by Oxygen
      • CO2 Measurement range: 0~9999 ppm 
      • CO Measurement range: 0~1,000 ppm
      • O2 Measurement range: 0~25% 
      • Temperature: 0~50°C
      • PM2.5,10 Measurement range: 999 ug/m3 (whichever is greater)
      • CO2 Accuracy: ± 50ppm, ± 5% of reading (0~5,000 ppm)
      • CO Accuracy: ±5%~±10%
      • O2 Accuracy: <2% FS/0.1 mbar
      • PM2.5,10 Accuracy: ±15% or ±15 μg/m³
      • RH - 0-100%
      • Power Supply: Rechargeable Battery - Li-ion 18650 3.7V 
      • Battery Life: tested to 24+ hours
      • Weight: 305g (without batteries)
      • Lifespan: NDIR: 15 years, EC: 2 years, Fluorescence Quenching by Oxygen: 5 years


      • CO2, CO, O2, PM2.5, PM10 Gas Detector
      • Manual
      • USB Charging Cable
      • SD Card (16g), Data Logging Capability


      • 1 year - See CO2Meter Terms and Conditions.


      BAT-18650 - EBL 18650 3.7V Li-ion Rechargeable Batteries

      EBL Intelligent Batteries (need 3 for device) provides a fast charge and are upgraded ETL certified to be used with all CM-500 series handheld gas detectors.

      RS485 Cable Option - Contact Us for Further Information

      Free Easy-to-use GasLab® Software 

      This device uses GasLab® software for setup, calibration, data logging, and real-time data analysis. GasLab® makes it easy to export data into a .CSV file that can be imported into any industry-standard software or spreadsheet. GasLab® runs on Windows XP or higher, and free to use with our products.

      Download Latest Software Here

      System Requirements for Data Logging or Changing Defaults

      • Windows XP SP2 or newer
      • Microsoft .Net 3.5 Runtime Libraries
      CM505 Handheld CO2 CO O2 Gas Detector

      Customer Reviews

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      "Easy to install, easy to set up, and easy calibration - just what I was looking for."

      - Phillip Farrar
      Water Plant Superintendent

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