Product Overview Video:

Harwil, Historically Reliable

Harwil Corporation manufactures electro-mechanical fluid flow and liquid level switches and controls. All designs are focused on producing simple, reliable, low cost solutions with broad operating flexibility in a multitude of physical, thermal and chemical operating environments.

Relentless Innovation

From our innovative temperature sensing flow switch, to our unique single-point level controller (which eliminates costly latching controllers and multiple level switches), Harwil is continually bringing innovative solutions to many industries.

Made in the USA

Harwil products are manufactured locally in the United States, giving us tighter control over quality, and shorter lead times than our competitors.


Look for our ads in:

Flow, Control, Magazine Water Technology, Magazine, Water, Technology Water, Well, Journal, Water Well Journal
Water, Conditioning, Purification, Magazine WQP, Water, Quality, Products AHRI, Air-Conditioning, Heating, Refrigeration Institute

Proud to be members of:

WQA, Water, Quality, Association Irrigation, Association NGWA, National, Ground, Water, Association