Proteus 8000 Series instruments provide accurate, rugged, reliable and cost-effective measurement of heat transfer fluids and other liquids from -40 to 90 °C. Customized versions can be adapted for use with liquid temperatures to 150 °C and above. A built-in relay can be used to sound an alarm or shut down a system before damage is done to valuable equipment and products.

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(650) 964-4163

(650) 965-0304

For special orders and California reseller with a resale certificate, please call us directly to place your order.

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Phone: (650) 964-4163

Proteus offers free samples of standard Proteus-manufactured flow switches or flow meters for evaluation in new applications by prospective OEM customers.

To request a free sample, please send an e-mail describing your application to with “Free Sample” in the subject line. Be sure to include your name, the name of your company, the address to which the sample should be sent and your telephone number. You may also call Mark Malfatti or David Chiasson at (650) 964-4163.

Who is an OEM?


OEM customers are those who incorporate our product into their own product for commercial sale to end users. Usually, you will have a website or product data sheet showing a product that incorporates flow measurement.

WeldSaver™ products, Tofco flow products and Florite control units are not included in this offer. There is a limit of one free sample per customer. Proteus Industries retains the sole right to determine which companies are qualified OEMs for the purpose of this offer.

  • 8000 Series Liquid Flow Meter
  • 8000 Series Liquid Flow Meters a
  • 8000 Series Liquid Flow Meters c
  • 8000 Series Liquid Flow Meters d

8000 Series Liquid Flow Meters

8000 Series Liquid Flow Meters

> Flow ranges from 0.2 to 227 LPM / 0.05 to 60.0 GPM
> Accuracy of 3% of flow range
> Liquid temperatures from -40 to 90°C for standard models – customized versions to 150°C and above!
> Enhanced accuracy and stability from digital signal processing
> AutoAlarm™ automatic alarm trip point setting feature
> 0–5 VDC or 0–10 VDC and 4–20 mA outputs
> Standard NEMA 4X / IP66 enclosure
> Customization available for OEMs
> 5-year warranty