HED, also known as Hydro Electronic Devices, Inc., is a privately owned company headquartered in Hartford, Wisconsin. Founded in 1986, it employs approximately 220 individuals. The company functions as a designer and manufacturer of rugged electronic control systems and telematics for heavy-duty mobile equipment and vehicle Original Equipment Manufacturers (OEMs). Its components are engineered to survive extreme shock, vibration, and temperature ranges in off-highway and vocational vehicles.
