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Thick Film Catalytic Calorimeter |
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This technique relies on
the combustion of carbon monoxide and oxygen
over a catalytic surface. A four quadrant
track is precision-printed onto a substrate
using platinum ink. Each quadrant forms one
leg of a Wheatstone bridge circuit.
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A catalyst is printed across
two quadrants, before a layer of protective
glaze, having a consistent thickness, is printed
over the complete circuit.
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The disk is mounted in a measuring cell and heated
to 300 degrees centigrade , at which stage the gas sample enters.
Any carbon monoxide in the sample will burn on the
catalytic surfaces, causing a heating effect. This
alters the current in the circuit to produce an
output that is proportional to the carbon monoxide
concentration in the sample.
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Benefits:
- High sensitivity - state-of-the-art
technology detects less than 30 parts per million change
in gas concentration.
- Excellent stability - unique design
protects sensor and minimises drift, enhances reproducibility
and improves long-term performances.
- Accuracy - patented design,
including platinum track only microns thick, gives accurate
measurement and minimises cross interference.
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