COMBUSTIBLE GAS SENSOR

摘要

The present invention provides a sensor for combustible gas. The present invention also provides a process for the fabrication of a LPG gas sensor with planar thick film technology. The present invention particularly provides the manufacturing of semi conducting SnO2 based bi - layer sensor where the composition of the first layer comprises SnO2, Pt and rare earth metals and that of the second layer comprises Pt, Nb and Si, the second layer being dip coated on the first. The (3) main steps involved in fabrication of the sensor are (i) the sensor is a bi - layer structure where stability, sensitivity and selectivity have been achieved by a single step in providing a top layer by dip coating (ii) miniaturizing the size of the sensor heater, which leads to less power consumption (iii) providing a support to the fragile electrical leads.