Plug-in resistance sensors are ideal for all possible application of temperature measuring. PWF 70 is the preferred thermocouple at hot runner systems. The passage of compensating wire and protection tube is conical strain relieved. Anti-kink protection is selectable. Springs with special-fiberglass hose and 400 °C heat resistant varnish are standard. Available are as well various protection tube materials, lengths and diameters. Standard leads are galvanized copper wires with PFA- and fiberglass insulation covered by steel metal braid.