Proteus Industries develops, manufactures and markets a full line of liquid flow switchesmeters, sensors, and control systems worldwide.

We offer a wide range of network capable, rugged, precision liquid flow sensing and control instruments for the semiconductor equipment, automotive, medical and casting markets.  Our worldwide customers value Proteus' 40 years of experience and our proven ability to customize flow control products for their complex and specific applications to measure temperature and pressure, improving process control and predicting service shutdown for heat exchangers and other critical equipment.

Industries We Serve



Featured products

8000 Series Flow Meters
Liquid Flow Meters


Coolant Flow Controller & Leak Detector


Vortex Flow Meters
Liquid Vortex Flow Meters


Tofco Flow Controllers



Proteus Industries is the exclusive North American distributor of Tofco flow management products, including flow meters for ultrapure liquids and flow controllers. These high-quality products are designed and manufactured in Japan for the demanding requirements of the semiconductor industry and other critical applications.

Our Advantages

Proteus has an ISO 9001 certified quality system. Our flow switches, meters, and sensors are backed by our five-year warranty. Information on our Conflict Minerals Policy statement,  RoHS and WEEE policy can be found HERE




We offer a 5-Year warranty for Proteus Manufactured Flow products and a 2-Year warranty for WeldSaver™ products.