METHOD FOR SENSING GAS COMPOSITION AND PRESSURE

摘要

A method for sensing gas composition and gas pressure, based on the thermal constants of a variable electrical resistor, is presented. The method for sensing gas composition and pressure consists of monitoring a variable electrical resistor whose dynamic thermal response is determined by the thermal conductivity and thermal capacity of the surrounding gas of a given atmospheric environment. In the thermal domain, the sensor has a low-pass characteristic, whose phase delay is determined by the thermodynamic characteristics of the surrounding gas such as composition and pressure. The present invention can be used as a method for sensing gas composition. The present invention can also be used as a method for sensing gas pressure.