Flow Transmitters

Handle up to 5,000 psi

  • 4-20mA & 0-5 V outputs available
  • Available with or without gauges
  • Handle up to 5,000 psi

High Pressure Flow Transmitters

Orange Research flow transmitters handle working pressures to 5,000 psi. Machined from solid blocks of metal, the flow transmitter pressure bodies protect sensitive, repeatable sensors within a rugged, protective housing. A magnetic sensor relays slight changes in pressure to the electronics, which amplify and linearize the signal. Changes in flow conditions can be monitored remotely. A comprehensive understanding of flow transmitter types and their benefits empowers you to optimize your systems and maximize performance. Learn more from our experts below.


Flow Transmitter Voltage or Current Output

One flow transmitter unit can be wired for either voltage or current output. Two wire for loop power (4-20mA) use offers more flexibility…there is no need to bring a separate power line to the unit. Installation time and costs are reduced. For voltage outputs (0-5 volt) 3 or 4-wire use is required.


Add Local Indication

These flow transmitters can be configured with or without dials. Many times an easy-to-read gauge is a separate instrument to be specified. Our flow transmitter types have a gauge option which allows for local and remote monitoring! Up to 4.5 inch dials are available, which can be read from over 75 feet away.

Advantages Over Rotameters

  • High line pressures (to 5,000 psi)
  • Mount in any orientation, not just vertical
  • Easy to read dial option – especially with dirty or opaque fluids

Built for industrial applications, our flow transmitters feature a weatherproof enclosure that protects the electronics with Class 1, Div 2, Nema 4X & IP 65 ratings.


Flow Transmitter Applications:

  • Coolers & Chillers
  • Flow
  • Heat Exchangers
  • Anywhere Pressure Drop is an Issue

PowerOutputsWiringOperating Temperature
9-35 VDC0-5 VDC, 4-20 m-A2 wire (loop powered current output), 3 or 4
wire (voltage output)
-20° F to 200° F (ambient) Temperature
compensated output

*Instruments that accept two reed switches can be supplied with one SPST and one SPDT switch if desired. Refer to our individual model Specification Sheets for complete specifications listings.

Download Complete Instruction Sheet On Our Transmitters, Including Electrical Connections (PDF)

Flow Transmitters

Our instrument sensors include a magnet that moves with the sensor as the pressure or flow conditions change. Our transmitters incorporate a Hall effect sensor that transforms that movement into an electrical output. As the conditions change and the sensor moves into proximity to the Hall effect sensor there is a change in output from the Hall effect sensor that is proportionate to the flow rate.

Every flow transmitter is capable of providing a current and voltage output. The user simply selects the output they require. Temperature compensation ensures that the output of the transmitter does not drift.

Each flow transmitter can be installed as a two-wire current (loop powered) or as a three- or four-wire voltage connection. The safety ratings of the switch enclosures also apply to the transmitters.

Speak With Our Experts About the Best Flow Transmitter Types for Your Application

Orange Research’s team of experts is ready to advise on which flow transmitter types can provide you with accurate flow measurement and process control. If you have any questions about differential pressure and flow control solutions, or about specific flow transmitter types and configurations, our team is here to help. Contact us or fill out the form on this page and a member of our team will be in touch shortly.

Flow Transmitter Family

Flow Transmitter Front

Flow Transmitter Back

WARNING: Some of our products contain Nickel, a chemical known to the State of California to cause cancer. For more information go to: www.p65warnings.ca.gov

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