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WRNK Thermocouples sensors

WRNK Thermocouples sensors is mineral insulated construction which results in thermocouples wires that are surrounded by a compacted mineral insulation (MgO) and contained in a sheath such as stainless steel or heat resisting steel.


–   Wide application in measurement

Small diameter thermocouple is very usefull for the place where space is at  premium. Mineral insulated construction is resistant to high pressure  and also used at wide range of temperature from-200°C to +1260°C.

–  Quick response

Mineral  insulated thermocouples have small heat capacity due to the small  sheath size, the small thermal mass is highly sensitive to change in  temperature and  gives a very fast response.

–   Easily bent for installation

The ability to form mineral insulated thermocouples on a radius twice the  sheath diameter makes for simple and on-the-spot installation into  complex configurations.

–   Long Iife span

Contrary  to conventional thermocouples which suffer from deterioration of  electromotive force or wire disconnection, etc., mineral insulated  thermocouples wires are insulated with chemically stable magnesium oxide, thus assuring a longer service life.

–   Excellent mechanical strength and pressure Resistance

The composite construction is resistant to extreamely high vibration  levels, and by choosing appropriate sheath material, it is reliable to  use in corrosive atmospheres and   abnormally high or low temperatures.  Though it has small diameter, it can withstand about 350 MPa at a  temperature of 650°C.

–   Custom sheath outer diameter available

Sheath outer diameter sizes between 0.25mm and 12.7mm can be provided.

–   Custom long length

Length are available up to a maximum of 400m. Maximum length is dependent upon the sheath outer diameter.



Measuring temperature range Unit
Sheath Diameter  (mm) N K E J T
0.25 —— 500 —— —— ——
0.5 —— 600 —— —— ——
1.0 900 650 900 650 450 300
2.0 1200 650 1200 650 450 300
3.0 1260 750 1260 750 650 350
5.0 800 1260 800 750 350
6.0 1000 900 1260 800 750 350
8.0 —— 1050 1000 —— 800 750 350
Sheath material Inconel 600/SUS310/H2300/SUS316


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