Proximity Controls was started in 1965 out of a garage in Fergus Falls, MN. The first product line was the Ultra-Mag Series of diaphragm level controls. The Ultra-Mag offers a unique and patented magnetic drive that seals the switch compartment. read more
Building on their experience with magnetic drives, Proximity expanded into position indicators in 1977 with the invention of the Mark Series. Like the Ultra-Mag, the Mark Series offers a patented magnetic drive that completely seals the switch compartment.
Proximity Controls was acquired in 1989 by Dwyer Instruments of Michigan City, IN. Proximity Controls is still operated out of Fergus Falls today. Dwyer continues the innovative spirit of Proximity Controls by continually developing new products.