This practical temperature alarm switch comes with standard 3/8NPT thread and fixed 105℃ trigger point. It monitors engine coolant temperature in real time, and will send out prompt alarm signals once the temperature reaches 105℃. It effectively reminds operators of abnormal heat status to prevent engine overheating damage and extend equipment service life. Made of sturdy heat-resistant materials with stable internal structure, it owns stable performance and long service life, ideal for various mechanical engine daily matching and replacement use.