COVID-19 Update

Proteus Industries’ manufacturing operations are partially open to service essential businesses including Medical and Semiconductor as part of the government’s “shelter in place” order for the San Francisco Bay Area to contain coronavirus. We are checking e-mails including tech and customer service e-mails. The order currently covers the period of March 17 through April 7, 2020.

For customers, needing sales information please email at and for tech support/questions we will respond through . Vendors should contact us through Note that we will have limited operations through this period. Other urgent communications may be sent to our President, Jon Heiner at We apologize for the disruption this may cause.

Proteus Industries

Proteus Industries develops, manufactures and markets a full line of liquid flow switches, meters, 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

Semiconductor OEMs & Device Manufacturing

Precision Casting & Advanced Heat Extraction

Robotic Welding for Automotive Assembly

Data Center &
Supercomputer Cooling

Medical Imaging
& Radiotherapy

R&D and Customization

-Next Gen Processes & Technologies

featured products

8000 Series Flow Meters

Liquid Flow Meters + Swiches


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.