Products IN-STOCK ready to Ship Next Day for orders placed by 2pm EST. Use Code SENSE for 10% OFF.

TecWeld O2 + CO2 Weld Purge Monitor

TecWeld O2 + CO2 Weld Purge Analyzer - CO2 Meter
Regular price $4,899.00

POs or wholesale quantity discounts click here

The TecPen Oxygen and Carbon Dioxide Weld Purge Monitor is designed to provide accurate measurements down to 0% oxygen and up to 100% carbon dioxide when back purging with argon and CO2 gas mix during welding. This portable O2 and CO2 analyzer will verify that there is no oxygen during argon back purging for TIG welding, or argon CO2 blend for MIG welding.



  • Provides accurate measurements down to 0% O2
  • Measures CO2 levels up to 100%
  • Prevents welding defects
  • Can be used immediately, does not require warm-up time
  • Data logging capabilities with USB transfer for Quality Control/Inspection
  • Ideal for MIG/TIG welders and industrial applications or environments


    • TS-300 - TecWeld 0-2,000ppm Oxygen
    • TS-302 - TecWeld O2 + CO2 Weld Purge Monitor


    • Measurement range: 0-2,000ppm
    • Accuracy @ 0-500 ppm: 2% MEV**
    • Accuracy @ 500-1000 ppm: 3% MV*
    • Accuracy @ 1,000-2,000ppm: 4% MV*
    • Resolution: 1ppm
    • Response time at 25°C: < 15 seconds
    • Pump flow: 400mL/min.
    • Temp. range Min./Max: 14°F-140F° (-10°C-60°C)
    • Medium: Gas
    • Power supply: 5V USB and LiPo Battery
    • Storage Capacity: 4GB
    • Rechargeable battery life: > 3 hours per charge
    • Data Interface: USB
    • Temperature compensation: 50 - 86°F (10 - 30°C)
    • Display: OLED
    • Cleaning: no organic solvents, 40% EtOH
    • Parts touching sample: St.1.4404 / PTFE / glass
    • Case: Anodized aluminum
    • Protection: IP65
    • Manufacturer service Interval: 3 years
    • Case with Device Weight: 2.45 lbs.
    • Case Dimensions: 12 x 11 x 3.25 inches
    • Device Weight: 0.50 lbs.
    • Device Dimensions: 7 x 2 x 1 inch
    • Sensor cap replacement interval: 2 years
    • Recommended customer calibration interval: 6 months

    TecSense sensors are CE, FCC, IC, KC, and MIC marked, and meet the requirements of ASTM F2714-08. The manufacturer is DIN ISO 9001/2015 certified.

    Please note: If the sensor device logs every 2s the storage will be maxed out in 900+days.



    TecPen for Welding Handheld Oxygen and CO2 Sensor DataSheet Data Sheet (pdf)

    TecWeld O2 and CO2 Analyzer Manual (pdf)

    TecWeld Oxygen and CO2 Sensor System Info Sheet TecWeld Application Overview (pdf)

     EU Declaration of Conformity (pdf)

    calibration Factory Reset and Calibration Video


    • Data Sheets

    • Manuals

    • Technical Documents

    • Videos

    • Additional Resources

    • Case Studies

    Customer Reviews

    No reviews yet

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

    - Phillip Farrar
    Water Plant Superintendent

    Read More Reviews...