A brass thermowell with a long stem and hex fitting – long stems reach the center of pipes and tanks where the reading is true. Stem straightness matters at this length, so each well is checked for runout along its full length.
Function and Design
The thermowell is small in the bill of materials and large in the warranty claim when it goes wrong. Thermowell repeatability is designed in through dedicated tooling and recorded settings.
Design Highlights
- Hex dimensions are inspected, so torque does not deform the flats.
- Long stems are checked for straightness along the full length, because a bowed well reads the wrong part of the pipe.
- Inspection records and material certs can be supplied with each shipment.
- Material: brass (H62 / H65), with mill certificate and heat-number traceability supplied with the first article.
- Process: the thermowell is deep drawn and stress-relieved before machining of the critical features, stem length held to the print.
- Finish: No catalogue finish: the thermowell surface is agreed on the drawing and confirmed at sample approval.
- Size: To your print, stem length per print; dimensioned sketches can be advised before the thermowell is quoted.
- Custom: Custom thermowell builds to your drawing, with small trial lots possible before committing to volume.
Applications
Typical applications include industrial process instrumentation, HVAC and refrigeration sensors, NTC and PT100 probe assemblies.
Why Source It From Aunov
Sealing faces are machined and checked, because a housing that leaks fails the whole instrument. Any deviation on a sealing face is corrected at the machine, not after plating.
Ask for OEM pricing and a free thermowell sample – every enquiry gets an engineering review first.