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    • Home
    • Product Overview
    • Products and Prices
    • Flow Data
    • Instructions
    • Contact
  • Home
  • Product Overview
  • Products and Prices
  • Flow Data
  • Instructions
  • Contact

Thel-Mar Portable Volumetric Weirs

AFFORDABLE :: ACCURATE :: PORTABLE

Thel-Mar is THE manufacturer of the Portable Compound Volumetric Weir.  We are a family-owned and operated business for over 40 years.  All of our products are made in Ohio. Thel-Mar distributes our weirs internationally.


The Thel-Mar Volumetric Weir is the industry's most accurate and affordable portable flow-measuring device. Our faceplates are laser engraved for longevity and have been proven to be the most accurate solution for highly variable, partially full pipe measurement.

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Made To Last

Phone: (937) 381-7880 E-mail: info@Thel-mar.com

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