Extended Range. Extended Temperature. Extended Durability. These sensors are made for tough automotive applications such as assembly machines, MIG welding cells, spot welding cells and other areas where extra durability is required. These sensors are 100 degree C rated, with a standard Polytetrafluoroethylene (PTFE) Coating to resist weld spatter, these sensors are built for harsh applications. HTM Sensors was the first to offer an extended range metal face proximity sensor, and with the widest lineup including AC, DC 2-wire, NPN and PNP models, shielded or unshielded, quick connectors or pigtail connections, we have a model perfect for your applications.