Making Physiology Happen


iWire-GA1 CO2 & O2 Gas Analyzer

The iWire-GA1, CO2 and O2 Gas Analyzer is easy-to-use, robust and adaptable to human, animal and plant applications. The iWire-GA1 plugs in the iWire port on an iWorx Recorder for recording, display and analysis of O2 and CO2 signals.  In addition, the iWire-GA1 incorporates an input for a Temperature Sensor (TM-220) and a Polar(R) Heart Rate Receiver (PHRM-100 ).

The iWire-GA1 is suitable for recording and measuring:

  • Basal Metabolic Rate (BMR)
  • Resting Metabolic Rate (RMR)
  • Respiratory Exchange Ratio (RER)
  • Sedentary to light activity VO2 and VCO2
  • VO2 Max


Sensors O2, CO2,Temp, Barometric Pressure, HR
Temp 10 – 50 deg C
HR Polar Heart Rate
CO2 Sensor
Range 0-10%
Sense Method NDIR
Error < 0.26% CO2
Warm up 5-8 minutes
O2 Sensor
Range 0-50 %
Sense Method Paramagnetic
Linearity < 0.2% O2
Repeatability < 0.2% O2
Drift < 0.4% in 1st 24 Hours,
then <0.2% additional the following week,
then < 0.2% additional per each following month.
Warm up 1 minute


Animal Metabolism
AMe-01-iWireGA: SmallAnimalRER-iWireGA
Human Exercise
HE-04C: Respiratory Exchange Ratio
HE-05C: Resting Metabilc Rate
HE-08A: Regulation of Body Temperature and Respiratory Exchange Ratio (RER)
HE-09C: Resting, Active and Exercising Metabolic Rates
HE-10C: Aerobic Fitness Testing

Part Number: iWire-GA1