QGC Pyroelectric Infrared Analog Gas Sensors

KEMET’s QGC thin film pyroelectric gas sensors can be reduced in physical size and still provide high sensitivity with fast frequency operation, enabling this highly stable one to four element sensor in a TO39 package. The sensor element is built into a low noise circuit that has an internal CMOS operational amplifier with a 10 GΩ feedback resistor outputting a voltage signal centered around half the supply rail.

The evaluation kit includes USEQGCDAC82L00 dual-channel CO₂ sensor, IR emitter (with reflector and sapphire window), brass gas cell (5 cm), PCB with microcontroller and ADC, 9 V power supply, micro USB cable, and a software CD. The PCB enables adjustment of 2nd stage amplification, sampling, and filtering parameters, followed by analog-to-digital conversion with USB connection to a PC.