Günther Main type_52WOS

52-WOS

Mineral-insulated resistance thermometers without protection tube

Sensors of this type are used for general temperature measure- ment up to 600°C, on rare occasions up to 800°C. They are suited for surface temperature measurement as well as measurements of liquids and gases.

Depending on the connection type (2-wire, 3-wire or 4-wire – in turn depending on the required measurement precision and connector length), resistance thermometers consist of 2, 4 or 6 copper feed lines (inner conductors), surrounded by a thin metallic protective sheath, usually made of high-grade steel.  The inner conductors are firmly press-fitted and insulated in ceramic powder. The preci- sion resistor inside the sensor tip is connected through the inner conductors.

As a result of their structure, mineral insulated resistance thermom- eters have the following advantages:

•  Small physical dimensions with maximum flexibility for temperature measurement at sites with difficult accessibility (diameter 1,5 – 6,0 mm).

•  Short response time for exact measurements of temperature variations

•  Optimal protection for the sensor system against corrosion, oxidation, phyiscal damage and chemical contamination as a result of the enclosed structure

•  The enclosed structure also facilitates application of these sensors without additional protective fitting

For specialised applications (precision, long-term stability, etc.) we recommend the application of precision resistors with narrowed tolerance.The resistance values and tolerances of our resistance thermo-meters are according to DIN EN 60751.

Application examples for mineral-insulated resistance ther- mometers without protection tube:

Plant and machine construction

Automobile industry

Laboratories

Plastic industry