Gas Analyzer

Respiratory Gas Analyzer

Product Code ML206
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The Gas Analyzer allows the continuous measurement of respiratory gas concentrations from rats through to humans. It houses an infrared carbon dioxide sensor and optical oxygen detector. The CO2/O2 respiratory gas analyzer samples expired gas from a mixing chamber with a damped, micro-vacuum sampling pump. A flow control knob on the front of the unit provides sampling rates of 35 to 200 ml/min, although maximum flow values may vary for different sizes and lengths of tubing.

Included with the Gas Analyzer:

For use with:

Key Features

  • Variable sampling flow rates from approximately 35 ml/min to 200 ml/min.
  • An in-line filter attached to the sampling port of the Gas Analyzer to protect the transducers against moisture and damaging particulates.
  • An infrared CO2 sensor and an optical O2 detector fed from a damped micro vacuum sampling pump.
  • Automatic calibration of the CO2 and O2 channels when connected to PowerLab.


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Details and Tech Specs


Gas Analyzer Data Card

  • Sampling system: One CO2 and one O2 transducer fed from a damped, micro-vacuum pump.
  • Gases: Must be non-corrosive and non-flammable. A moisture removal scheme must be employed before the sampling inlet.
  • System sampling flow rate: Approximately 35–200 ml/min (user variable).
  • Internal damping volume: 75 ml
  • Gas connector: plastic luer
  • Moisture filter: It is recommended that a 0.45 μm hydrophobic membrane filter be fitted before the sampling inlet.
  • Materials in contact with gas: 316 stainless steel, sapphire, Nylon 66, silicone rubber, epoxy varnish
  • Warm-up time: 10 minutes at 20 °C

CO2 System

  • Type: Infrared, optical
  • Range: 0–10% CO2
  • Output: Linear, 0–1 V (0–10% CO2)
  • Resolution: 0.1% CO2
  • Linearity: ±0.1% CO2
  • Drift: 0.1% CO2 over 8 hours
  • Response time (10–90%): 90–130 ms @ 200–50 ml/min - transducer alone; 440 ms @ 200 ml/min sample flow with Nafion tubing and hydrophobic filter connected to sample inlet port
  • Temp coefficient: Zero: <0.01% CO2/°C
  • Span: <0.02% CO2/°C

O2 System

  • Type: Visible spectrum (760 nm) absorption
  • Range: 5–100% O2
  • Output: Linear, 0.05–1 V (5–100% O2)
  • Linearity: ±0.2% O2
  • Response time (10–90%): transducer 130–300 ms between 200–50 ml/min
  • Cross-sensitivity: ±0.2%
  • Resolution: 0.01% O2
  • Drift: 0.1% O2 over 2 hours

Operating Requirements

  • Power supply: 85–250 VAC 50/60 Hz
  • Peak power requirements: 60 VA
  • Temperature range: 5–35 °C
  • Humidity: 0–90% (non-condensing)

Signal Outputs

  • Analog output: BNC connectors

Physical Configuration

  • Dimensions (h × w × d): 60 mm × 300 mm × 300 mm (2.36" × 11.8" × 11.8")
  • Weight: 5 kg

Product Code

Gas Analyzer
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