publication . Article . 2013

Development of an auto-calibrated interfacing circuit for thick film multi-gas sensor

Mohd Nizar Hamidon;
Open Access
  • Published: 18 Oct 2013 Journal: Sensors and Actuators A: Physical, volume 204, pages 48-57 (issn: 0924-4247, Copyright policy)
  • Publisher: Elsevier BV
A simple, cheap, and integrated architecture is introduced to measure gases with a thick film gas sensor. The temperatures of the sensors are stabilized by controlling the heaters of the sensors. The heaters’ temperatures are measured by sampling the heaters resistance through the use of a voltage divider and ADCs. A microcontroller accordingly adjusts the output of DACs in order to apply the appropriate steering voltage to the heaters. The method employed to measure the gases is to sample the voltage drop over the resistances of the sensors, which are depending on the gases, by ADCs. The innovation lies in the simplicity of the design and the use of different s...
free text keywords: Instrumentation, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films, Condensed Matter Physics, Metals and Alloys
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