Coulometric track humidity sensor measurement circuit has connections to operational amplifier in voltage source to control voltage drop to preset value

摘要

A coulometric track humidity sensor (2) measurement circuit has connections (6, 7) and shunt impedance (4) for use as an internal impedance across the output (8) and inverting input (9) of a non inverting operational amplifier (5) in the voltage source which has as a controller (12) so that the voltage drop across the sensor can be adjusted to a preset value.