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·Similar to Car Battery - Dissimilar metals set up potential current
·Electric current generated is proportional to gas
concentration permeating
through diffusion barrier (oxidization or
reduction)
·Measured parameter is targeted through sensor chemistry
What
is an Electrochemical sensor?
Tens of 10,000s used
extensively
§Safety – Ambient air
monitoring
§Combustion applications
§Emissions & process
monitoring