IMPEDANCE MEASUREMENT MODULE FOR GAS SENSORS WITH TEMPERATURE CONDITIONING FEATURE

Grzegorz Lentka, Jakub Mróz

Abstract

The paper presents an impedance measurement module which is aimed for gas sensor. Sensor’s heater temperature conditioning and modulation feature is available in order to allow implementation of different techniques improving selectivity and sensitivity of gas sensors. The measurement module uses three-parameter sine-fitting technique for impedance measurement. To monitor sensor temperature, the resistance of the sensor’s heater is measured while continuously maintaining temperature control with the aid of PID regulator.

Keywords

gas sensors, impedance spectroscopy, impedance measurement, sine-fitting, digital signal processing

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IMEKO-WC-2015-TC4-128.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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