Harwil is the manufacturer of Flow Switches Liquid Level Switches Temperature Sensors Chemical Feed Pump Controllers and Wireless Switching Systems. Harwil is located in Oxnard California and has been manufacturing high quality reliable switch and pump control products for over 50 years in the USA. Harwils switches are used everywhere from US Navy warships to your backyard swimming pool. The new Wireless Switch Systems eliminate the need for the wire from the switch to the device that it controls. The Harwil Wireless Switch System can be with used with any kind of switch and eliminates the cost of installation and maintenance. Call us for switches.