Harwil Corporation’s controllers are specifically designed to compliment Harwil Flow and Level Switch products.

The unique L-21 and LC-1 provide latching contacts for pump up/pump down control of solenoid valves or pumps.

Model SDC-101 provides a time delay to allow a pump to establish prime before control is turned over to the flow switch.

Model CF-112 controls chemical injection pumps based on flow of the bulk liquid.

Series 27 Intrinsically Safe Relay allows any Harwil Flow or Level Switch to be used in hazardous areas. Approved for use in Class I, Groups A, B, C, D; Class II, Groups E, F, G; and Class III, Division 1 hazardous locations. The S27 also has a latching wiring option.