Family-owned since its 1916 founding in Rochester, Tel-Tru Manufacturing Company remains under the ownership of third-generation descendant Andy Germanow. The American manufacturer is known for temperature instruments built for demanding industrial and sanitary applications, with more than a century of experience supporting customers through custom-engineered solutions.
ISO 9001:2015 Certification
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3-A Certification
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NSF Certification
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ITAR Registration
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RoHS & REACH
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Proposition 65
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NIST-Traceable Calibration
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Kessler Thermometer and Chase InstrumentFamily-owned and operated since 1934, Kessler Thermometer and Chase Instrument manufactures precision thermometers and hydrometers in West Babylon, New York. The company is one of the last U.S. manufacturers in this field and developed its mercury-free SafetyBLUE line for applications where mercury is prohibited. Its 8,000-square-foot facility includes an ISO-accredited calibration laboratory that certifies instruments and provides NIST-traceable reports.WEST BABYLON, NY
Weiss InstrumentsSince 1882, Weiss Instruments has made temperature and pressure instruments and controls, building its name around industrial thermometers and pressure gauges. The company’s history began with Albert A. Weiss Jr. manufacturing glass thermometers with his father after World War I, and its third and fourth generations later carried the business through Long Island before manufacturing moved to Mount Clemens, Michigan, in 2022. Weiss also develops customized instruments for OEM applications, including its patented self-powered Vari-angle digital thermometers and light-powered pressure gauges.HOLTSVILLE, NY
Thermo Electric Company, IncSince 1941, Thermo Electric Company has built its reputation as a temperature-measurement specialist for industries where dependable readings matter. The West Chester-based manufacturer is now part of the COTEMP Sensing Group, with a network spanning six countries and three continents and a particular focus on tailored solutions for demanding industrial and semiconductor applications. Its work is supported by certified quality and calibration programs.WEST CHESTER, PA
TensitronTensitron has been an American instrument maker since 1935, when physicist Dr. Erwin J. Saxl founded the company’s predecessor to solve industrial tension-control problems. Now part of family-owned KTC Instruments, the Pittsburgh operation preserves that engineering heritage by making precision tension meters for manufacturers and maintenance teams worldwide. Its in-house ISO/IEC 17025:2017-accredited laboratory also calibrates the instruments it builds to NIST-traceable standards.PITTSBURGH, PA