Posted in | Gas Sensors

TecPen Oxygen and Carbon Dioxide Weld Purge Monitor

The TecPen Oxygen and Carbon Dioxide Weld Purge Monitor is engineered to deliver precise measurements ranging from 0% oxygen to 100% carbon dioxide while back purging with an argon and CO2 gas mix during welding.

This portable O2 and CO2 analyzer will verify that no oxygen is present during argon back purging for TIG welding or argon CO2 blend for MIG welding.

TecPen Oxygen and Carbon Dioxide Weld Purge Monitor

Image Credit: CO2Meter


  • Data logging capabilities with USB transfer for Quality Control/Inspection
  • Ideal for MIG/TIG welders and industrial applications or environments
  • It can be used immediately and does not require warm-up time
  • Provides accurate measurements down to 0% O2
  • Measures CO2 levels up to 100%
  • Prevents welding defects
  • 1-year warranty on Tecpen, 3 months on sensor cap


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


  • Accuracy @ 0-500 ppm: 2% MEV**
  • Accuracy @ 500-1000 ppm: 3% MV*
  • Accuracy @ 1,000-2,000 ppm: 4% MV*
  • Case: Anodized aluminum
  • Case with Device Weight: 2.45 lbs.
  • Case Dimensions: 12 x 11 x 3.25 inches
  • Cleaning: no organic solvents, 40% EtOH
  • Data Interface: USB
  • Display: OLED
  • Device Weight: 0.50 lbs.
  • Device Dimensions: 7 x 2 x 1 inch
  • Pump flow: 400 mL/minute.
  • Temp. range Minimum/Maximum: 14 °F-140 °F (-10 °C-60 °C)
  • Manufacturer service Interval: 3 years
  • Measurement range: 0-2000 ppm
  • Medium: Gas
  • Power supply: 5V USB and LiPo Battery
  • Parts touching sample: St.1.4404 / PTFE / glass
  • Protection: IP65
  • Rechargeable battery life: > 3 hours per charge
  • Resolution: 1 ppm
  • Response time at 25 °C: < 15 seconds
  • Recommended customer calibration interval: 6 months
  • Sensor cap replacement interval: 2 years
  • Storage Capacity: 4GB
  • Temperature compensation: 50 - 86 °F (10 - 30 °C)

TecSense sensors adhere to ASTM F2714-08 standards and are recognized with the CE, FCC, IC, KC, and MIC certifications. The manufacturer is DIN ISO 9001/2015 certified.

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