These ceramic caps extend sensor life and minimize downtime by providing a layer of needed protection to the face of sensors in harsh conditions. The caps can be added before or after installation. They provide end protection for flush-mount and cylindrical-style inductive proximity sensors against high temperatures, weld spatter, abrasives and impact. The caps can be threaded in place to protect the most vulnerable area of a cylindrical bodied sensor—where the face meets the barrel. The caps are compatible with any brand of sensor. Available sizes are M8, M12, M18 and M30.