Resistance sensors with connection heads are for solid, fluid or gaseous mediums. They are used for example at pipelines, within Heater and oven constructions. The interchangeable gauge slide is a standard Pt100 class B with two-wire circuit. Three- and four wire circuits resistance sensors class A as per IEC 751 are as well available. The B-shaped connection head is for surrounding temperatures up to 100 °C. BBK-heads goes up to 120 °C. The PWF 310 is manufactured with protection tube diameters of 11 mm and 14 mm. The fitting length is free selectable from 160 mm. A G 1” screw-in pivot is welded on the protection tube for fastening.