Sheathed thermocouples make very tight bending radii possible and are usually used in hard-to-access measuring points. In mineral-insulated sheaths, the thermoelectric wires are embedded in compressed oxide powder, making them vibration resistant. The measured values are therefore not influenced by bending or strong vibration.
Thermocouples have a very diverse range of applications. From reactor construction to laboratories and test plants, thermocouples guarantee precise temperature measurement on the surfaces of vessels, piping, apparatus and machinery, in gaseous and liquid media, and in low and high voltage ranges at low flow speeds.
In the thin-walled sheathed pipe (the wall thickness is approx. 12 ... 15% of the sheath diameter), 1 or 2 thermocouples (depending on the diameter) are pressed firmly into ceramic powder.
The thermoelectric wires are insulated against one another and the sheath as standard. In special implementations, the measuring position can be welded into the sheath. This further significantly reduces the reaction times in gases especially – yet worsens the corrosion resistance of the sheath material. The thermoelectric voltages correspond to the standards IEC 584, Class 2 or DIN 43710. We offer stainless steel or Iconel® as the sheath material as standard.
Sheathed thermocouples are also available in a huge range of constructions: from bare or insulated thermoelectric wire ends to firmly connected compensation lines with a choice of thermoelectric or connection plug, to assembly variants with different connection heads, such as DIN connection heads in form A or B.