Family-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.
ISO 17025-2005
ISO 9001-2008
ASTM Committee Membership for Thermometers and Hydrometers
Compliance program
NIST Traceability
Echo Therm, IncEcho Therm is a Springfield, Ohio manufacturer founded in 1947 that has remained on the same production floor for nearly 80 years, even as much of the thermometer industry moved overseas. It makes mercury-free glass thermometers for distributors, OEMs, and other volume buyers, with each tube still aligned and inspected by hand before shipment.SPRINGFIELD, OH
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
Tel-Tru Manufacturing CompanyFamily-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.ROCHESTER, NY
Thermal Instrument CompanyBorn in 1959 in founder Fred Curran’s basement, Thermal Instrument Company designs, manufactures, and calibrates thermal mass flow meters and flow switches for measuring liquids and gases. Still a family- and veteran-run business in Trevose, Pennsylvania, the company makes its instruments in the USA and supports them with local calibration and field service. Its meters are used in demanding settings from renewable natural gas and petrochemical plants to semiconductor fabrication, with more than 20,000 devices installed worldwide.334513FEASTERVILLE TREVOSE, PA