Photovolt Corporation
ca. 1940-present
Photovolt Instruments was founded in 1939 in New York City. Originally the company’s "main instruments included pH meters, colorimeters and polarimeters." Today the is headquartered in Minneapolis, Minnesot and is a leading "manufacturer and supplier of analytical laboratory instruments and reagents."
"Company Overview," Photovold Instruments, http://photovolt.com/about/company-overview/ (accessed 06/16/2015)