iWorX GA-200 Series Technical Note

GA-200 Gas Analyzer
Technical
Note
GA-200 Gas Analyzer
Overview
The GA-200 Gas Analyzer uses sensors to measure and display the
concentrations of oxygen and carbon dioxide in a sample as the percentage of a
gas in the sample by volume. This method of expressing the concentration of a gas
in a sample is also known as the percent volume fraction. In addition to the
sampling and sensing systems in the GA-200, the unit has a fluorescent display
used for observing measurements and analog outputs that allow the unit to be
connected to iWorx data recorders.
When measuring the concentrations of oxygen and carbon dioxide in a gas, a
sample is pumped from the input port on the front panel of the GA-200, through the
sample cell, and out an exhaust port on the back of the unit. Gas samples are
drawn into the unit through an external filter on the input port that protects the
sensors from contamination and through Nafion tubing connected to the filter that
removes moisture from the samples that would affect the measurements and the
unit's calibration.
The GA-200 Gas Analyzer has the ability to measure and record both oxygen and
carbon dioxide concentrations over the ranges normally recorded from human and
animal subjects.

Front Panel

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www.iworx.com
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GA-200 Front Panel