Temprel has been manufacturing thermocouples in Boyne City, MI for over 50 years. Over the years we discovered that our customers had to use several standard connectors for their tests, which can incur additional costs, take time to order several components, and in general takes longer to set up the test. Temprel answered that need by investing in CNC machines and hiring local machining talent. Now working with us means you will receive:

Prototype to production

We grow with you by manufacturing custom products ranging from 1 unit to 10,000 units.

Material selection

Temprel custom fittings offers 50+ metals and plastics, and 10+ surfaces finishes.

Rapid turnaround

High quality parts custom made to your specifications in as little as 2-3 weeks. Provide your drawing or we'll help create one.


Since 1990 we've been growing with our customers by providing custom thermocouples from prototype to production. Call or email us today to discuss your application.


Ready to discuss your application! Contact us!