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The sensor-e® CO (TML30) measures
carbon monoxide by comparing
infrared energy absorbed by a sample
to that absorbed by a reference gas
according to the Beer-Lambert law.
This is accomplished with a Gas Filter
wheel which alternately allows a high
energy light source to pass through
a CO filled chamber and a chamber
with no CO present. The light path
then travels through the sample cell,
which has a folded path of 14 meters.
The energy loss through the sample
cell is compared with the zero reference
signal provided by the gas filter
to produce a signal proportional to
concentration, with little effect from
interfering gases within the sample.
This design produces excellent zero
and span stability and a high signal to
noise ratio allowing extreme sensitivity.
Multi-tasking software gives real
time indication of numerous operating
parameters and provides automatic
alarms if diagnostic limits are
exceeded.