Flow Meters  |  Flow Switches  |  WeldSaver™  |  Flow Controllers  |  Legacy Products
100 Series  |  500 Series  |  800 Series  |  1000 Series  |  Customization
Proteus flow switches monitor cooling flow and other liquids in industrial applications. The 100 and 1000 Series are purely flow switches, while the 500 and 800 Series include metering outputs.

Our flow switches are backed by our five-year warranty. We have additional information for international customers.

Free samples are available for qualified OEMs.

We also offer flow meters and the WeldSaver™ cap-loss detector and coolant flow controller for robotic welding systems.
 
Proteus Flow Switch Selection Guide
PRODUCT FAMILY FEATURES
 
1000 Series

RoHS Compliant • Flow rates from 0.05 to 60 GPM / 0.2 to 227 LPM
• Adjustable trip point
• Visible indication of flow
• $195 - $520
 
500 Series

RoHS Compliant • Flow rates from 0.15 to 4.5 GPM / 0.6 to 17 LPM
• Temperatures from -40 to 140°C / -40 to 284°F
• Calibrated 0–5 VDC output
• Compact design
• Relay trip point
• $295
 
800 Series

RoHS Compliant • Flow rates from 0.05 to 60 GPM / 0.2 to 227 LPM
• Temperatures from -40 to 140°C / -40 to 284°F
• Calibrated 0–5 VDC output
• Relay trip point
• $250 - $810
 
100 Series

• Flow rates from 0.06 to 60 GPM / 0.3 to 230 LPM
• Adjustable trip point
• Visible indication of flow
• $145 - $540

1000 Series recommended for new designs
 
Customization

• Cables and fittings
• Special calibrations
• Manifolds
• Send us your specifications!
Typical applications include heat exchangers, chillers, high-power lasers, semiconductor production equipment, plasma cutters, x-ray and klystron tubes, vacuum and industrial furnaces and other equipment where water or other coolant flow is critical.

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