Thermowells

For each measuring point requirement the optimum thermowell

Thermowells from WIKA are used with demanding operating conditions both in solid-machined versions from solid-body material and in fabricated versions with tubular design. The variants offered differ mainly in their designs; with flanges, with threads for screwing in or for welding in. Furthermore, all connections for sanitary applications and also thermowells in solid-machined Van-Stone design are available without weld seams. The selection of materials and the manufacturing of the thermowells in accordance with global standards or to customer specifications ensure optimal protection for the sensor.

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FAQ

What is an ultrasonic test?

Through an ultrasonic test to DIN EN ISO 17640, for example, full penetration welds on thermowells can be investigated with respect to irregularities (cracks, voids, insufficient bonding). To do this, the reflections of a radiated ultrasonic signal from the interfa ... More

Why do some users specify a polished thermowell surface, and others define a high roughness or knurling of the area in the flow?

This depends on the usage of the thermowell.  A polished surface has a higher corrosion resistance than a rough surface.  The rough or knurled surface has an advantage with respect to the vibrational excitation by the Karman vortex street, meaning such th ... More

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