The company traces its origin to 1915 when a Pittsburgh engineer, Edwin L. Wiegand, received a patent for a resistance heating element embedded in an insulated refractory enclosed in a metal sheath.
On this technology, he founded Chromalox in 1917 and began producing the strip heater for what would become the modern electric clothes iron.
Chromalox incorporated in 1917, with the company's first order for a strip heater used in a product that became the modern household clothes iron.
- Provided first nuclear pressurizer heater for Navy submarine, USS Nautilus, commissioned in 1959
- First electric immersion heater with housing patent obtained in 1961.
- E.L. Wiegand took the company public in 1962.
- Chromalox acquired by Emerson in 1968.
- Expanded presence in the UK with acquisition of Bray and Grimwood in 1971.
- Further penetrated the European market with the acquisition of Etirex France in 1972.
In 1977, Chromalox Industrial Controls was born with the purchase of Rosemount Temperature Controls in LaVergne, TN. The controls product lines were diversified and expanded, positioning Chromalox as a leader in the industry.
- Further expansion in the UK took place with the acquisition of Eltron in 1987.
- Introduced new Service Group and product offerings in 2008.
Chromalox maintains numerous global product and plant certifications, including ISO 9001:2008, ATEX/IECEx, ASME, ATEX, PED, ABS, GOST, National Board, KOSHA, and SELO.
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