Gas Mixing System

Gas Mixing System (GMS-5002)

The GMS-5002 is a flow-through O2 sensor providing fast oxygen readings from 0% to 25%.

Used in tandem with our Dual Flow Meter, it is ideal for accurately mixing custom O2 and CO2 concentrations for hypoxic and culture conditions or where special pre-mixed gases are expensive or unavailable.

The GMS-5002’s oxygen sensor, measures ambient oxygen partial pressure (pO2). Internal pressure, temperature & humidity sensors enable the GMS-5002 to integrate these additional sensor readings and convert the pO2 reading to an oxygen percentage (%O2) as seen on the display.

The integrated solid-state sensors does not need replacement or re-calibration like conventional electro-chemical or galvanic sensors. The readings are factory calibrated to compensate for ambient temperature, pressure and humidity, enabling accurate operation over a wide environmental range. The system is easy to operate, very stable and robust, does not contain hazardous materials and has negligible cross sensitivity to other gases (e.g. CO2 and N2).
  • Sensors
    • Oxygen (O2) Sensor
      • Technology: Solid-state Fluorescence Quenching, Diffusion Sampling
      • Range: 0% to 25%
      • Accuracy tolerance: < 2% FS
      • Resolution: 0.1%
      • Operating Conditions:
        -30°C to 60°C, 500-1200mbar
    • Barometric Pressure Sensor
      • Range: 500-1200mbar
      • Accuracy tolerance: 5mbar
      • Resolution: 1mbar
    • Temperature Sensor
      • Range: -40°C to 125°C
      • Accuracy tolerance: ±0.2°C (0°C to 90°C)
      • Resolution: 0.01°C
      • Long-term Drift (max): <0.03°C/year
    • Humidity Sensor
      • Range: 0%RH to 100%RH
      • Accuracy tolerance: ±2%RH
      • Resolution: 0.01%RH
      • Hysteresis: ±0.8%RH (@25°C)
      • Long-term Drift (typical) : <0.25%RH/year


  • Reliable and accurate performance.
  • Long lifetime – low maintenance.
  • Solid state sensors – no moving parts, non-depleting technology.
  • Ease of use.
  • Virtually no gas cross-sensitivity. Works where other sensor technologies don’t.
  • Vibration and shock resistant.
  • Compensated for temperature, humidity and pressure.
  • Short warp-up time.


  • Solid billet aluminum construction.
  • Factory calibrated & Maintenance free – no re-calibration required in normal operation.
  • Uses standard 9V battery for convenient replacement.
  • Battery status and Low battery indicator (Backlight will turn red when battery needs replacement)
  • Designed and Manufactured in the United States