This WG9918580082 two-channel CNG leak detection alarm is an OEM gas safety monitoring component for Sinotruk HOWO and SITRAK CNG/LNG heavy-duty trucks. It is designed to detect compressed natural gas leakage and trigger an alarm once gas concentration exceeds the preset threshold. Equipped with two independent detection channels, it can monitor gas concentration at two different positions simultaneously. The built-in high-sensitivity gas sensor delivers fast response, stable detection and strong anti-interference capability. It supports real-time concentration display, sound and light alarm output, and fault self-check function. The compact housing is dustproof and vibration-resistant, suitable for the harsh working environment of heavy trucks. Every unit undergoes gas sensitivity calibration and functional testing before shipment. It is a reliable replacement spare part for faulty CNG gas leak alarm modules.