ZRT510 Refrigerant Sensor Module - China

This module uses non-dispersive infrared (NDIR) principle to detect the existence of refrigerant in fast response, with excellent selectivity and non-oxygen dependent. It’s a high performance module with temperature

MQ-4 MOS Flammable Gas Sensor - China

MQ-4 is a semiconductor(MOS) type gas sensor with high sensitivity to methane in wide range and also has anti-interference to alcohol and other gases. It has advantages of quick response, 10 years lifespan, low cost and simple drive circuit for the use of gas leakage alarm and portable gas detector.