Thermophysical response of a solid-state thermal-wave pyroelectric-film sensor to natural gas and methane

A chemiresistive methane sensor

“…While environmental CH 4 levels are typically monitored using gas chromatography (3) and optical gas analyzers (4)(5)(6), the development of alternative materials and approaches for CH 4 detection is ongoing (7-9) and includes pellistors (10,11), metal oxides (12)(13)(14), photoacoustic devices (15), as well as electrochemical (16,17) and thermal wave sensors (18). Although high sensitivities can be achieved using some of these methods, drawbacks typically include poor selectivity, high device power consumption, elevated operational temperatures, as well as expensive and bulky device enclosures that are impractical for realtime, high-spatial-resolution field measurements.…”