The hardware component of our products is made with highly corrosion-resistant stainless steel, ruggedized cables, and IP67 (with an option of IP69) waterproof connections. Used under normal conditions, EngineWatch and MachineWatch will remain maintenance-free throughout the lifetime of your equipment. Under extreme conditions of soot, fuel, or water exposure, the sense element may need to be replaced during an oil change, at a minimal cost and in less than a minute.