Flow measurement for the applications others can’t handle.
Radioactive, explosive, corrosive, bound for orbit, or barely moving at all. Our engineers design, build and calibrate the sensor your application actually needs, in Westerville, Ohio. Every unit is built and calibrated in-house under an ISO 9001:2015 quality system. Tell us what you’re measuring and you’ll work directly with the engineers who will design it.
Your request goes straight to a flow engineer, not a call center.
Inside the Westerville labHow a custom sensor goes from your spec sheet to calibrated hardware.
Tell us your toughest flow application.
A flow engineer reviews every request personally and will be in touch soon.
We use your details only to respond to this request.
- Flow meters on the ISS
- Boeing performance award
- ISO 9001:2015
- Since 1976
- Built in Ohio
Pick your tough job.
None of our sensors come off a shelf. Choose the condition that’s giving you trouble and see how we handle it.
Built for classified locations.
Thermal flow sensing has no moving parts to wear out or bind. Explosion-proof and intrinsically safe configurations are available, so the meter fits the area classification instead of the other way around.
- Explosion-proof enclosures
- Intrinsically safe options
- FM hazardous-location approvals (optional)
Built to run where you can’t get to it.
With no moving parts, there’s nothing to wear out in high-radiation or hard-to-reach areas. Plants have relied on Rheotherm flow meters and RheoVac condenser monitors for decades, supported by the team that builds them.
- Sensors for radioactive service
- Remote electronics for limited-access areas
- RheoVac condenser monitoring
Flight-ready flow measurement.
Our flow meters measure flow aboard the International Space Station. We design sensors and electronics for flight hardware, payloads and ground test stands, built to aerospace requirements.
- Space-qualified flow meter electronics
- Payload and test-stand sensors
- Custom sensor designs for flight hardware
Reads the flow others call zero.
Thermal sensing picks up flows too small for turbine or paddle meters, in liquids and gases, with no moving parts to stall at the low end of the range.
- Low-flow meters for liquids
- Low-flow meters for gases
- Bidirectional flow options
Wetted parts chosen for your media.
Tell us what’s flowing and we’ll match the wetted materials and sensor design to it, so the meter lasts in fluids that destroy off-the-shelf sensors.
- Wetted materials matched to your media
- No moving parts to corrode or seize
- Custom process measurement
From your spec sheet to calibrated hardware.
Tell us the application
Media, flow range, line size, pressure, temperature and environment.
We configure or design
From a custom configuration of a proven sensor to a design built from scratch.
We build and calibrate
Every sensor is built and calibrated in-house under an ISO 9001:2015 quality system.
We support it in the field
Installed Rheotherm and RheoVac units are supported by the team that knows them best.
Trusted where failure isn’t an option.
In orbit on the Space Station
Our flow meters measure flow aboard the International Space Station.
In nuclear and power plants
Plants have relied on Rheotherm flow meters and RheoVac condenser monitoring for decades.
Recognized for performance
Honored by Boeing for the performance of our flow measurement work on the International Space Station.
“The engineering team was knowledgeable, responsive, and helpful throughout our project. It’s refreshing to work with people who understand complex applications.”
Greg Schnidke · Bionetics customer
Questions engineers ask first.
Do you sell off-the-shelf flow meters?
Most of what we build is configured or designed for a specific application. We do keep some Rheotherm instruments in stock, so if a standard unit fits your needs, an engineer will tell you.
What do you need from me for a quote?
The fluid or gas, the flow range (minimum and maximum, with units), line size, pressure, temperature and the environment it will run in. Rough numbers are fine. An engineer will follow up on anything that’s missing.
Do you still support Rheotherm and RheoVac units?
Yes. Installed Rheotherm and RheoVac units are supported by the same team that designs and builds them, including calibration services.
Where are your sensors made?
In Westerville, Ohio. Every sensor is built and calibrated in-house under an ISO 9001:2015 quality system.
Do you ship to Canada?
Yes. We hold CRN registrations for Ontario and Alberta. Tell us your province when you request a quote and we’ll confirm what’s needed.
Have a tough flow application?
Send your specs or call. Either way, you’ll talk to an engineer, not a call center. Rough numbers are fine.
Send your full specs
More detail means a faster recommendation.