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Leak Testing
Our range of automatic leak testers provide solutions for manufacturers worldwide.
From PLC-driven production lines, to manual use on the bench top, our instruments are used throughout the world to ensure the quality and safety of manufactured goods.
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Pressure & Flow Measurement
Our expertise in the manufacture of highly sensitive differential pressure sensors allows us to provide flow and pressure measurement solutions with unparalleled accuracy at the low-end of the scale.
Our pressure transmitters start at a range of just ±50 Pa, with an accuracy of better than 0.25% of reading.
Through our varied range of Pitot tubes, laminar flow elements, flowmeters and transmitters, we can offer a complete solution for low-pressure and low-flow measurement.
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Calibration
We have been raising the standards of accuracy and calibration in the field of ultra-low range differential pressure and air flow measurement for decades.
Whether you are looking for a service to calibrate your instruments or a calibrator to do the work yourself, Furness Controls can help.
Our Calibration Laboratory is accredited for ultra low range differential pressure from 0.001 Pa up to 40 kPa, for gauge pressure up to 4 MPa, and air and gas flow from 0.1 ml/min to 40000 litres/min
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Leak testing, flow testing and ultra-low pressure measurement
For more than 60 years Furness Controls has designed and built leak testers, flow testers and differential pressure instruments for manufacturers around the world. Our differential pressure leak testers can detect pressure changes as small as 0.1 Pa, which means leak rates down to around 0.01 ml/min. They do this on the production line, without tracer gas, and without damaging the part.
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Advanced Flow Testers
Our new touchscreen instruments offer a multitude of test types, pressure and leak ranges, and are used across industry to verify product integrity and enhance consumer safety.
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Differential Pressure Transmitters
Suitable for ultra-low pressure measurement, our highly-versatile transmitters have an accuracy 0.25% of reading.
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Reference Pressure Standard
The FRS4 from Furness Controls is a low-pressure standard directly traceable to national standards, with a typical uncertainty of ±0.005% reading + 0.02Pa.
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Leak testing for electric vehicles and batteries
EV battery enclosures, cooling plates, glycol circuits, inverters and motor control electronics all need reliable sealing. Furness leak testers check large-volume battery enclosures with continuous pressure testing (FCO794), and small sealed electronics with high-sensitivity testing (FCO720).
Which leak test method is right for your part?
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Differential pressure decay leak testing
We pressurise the part, isolate it and measure any drop in pressure against a reference. It's highly accurate, repeatable and easy to automate.
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Flow and blockage testing
We check the flow through valves, filters, tubing and nozzles against a minimum or maximum limit.
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Sealed-part testing.
We check airtightness of hermetically sealed components from 0.1 ml internal volume.
Medical device leak and flow testing
Our instruments test IV and blood bags, tubing, catheters, valves, filters, masks and respiratory devices. Devices such as the FCO792 check flow rates, while leak testers such as the FCO790 check leak tightness and valve actuation pressures.
Whether it's flexible materials, small internal volumes, or highly strict standards, we've got leak testing equipment that can solve the most difficult quality applications.
We have a network of global distributors bringing our testing knowledge to factories around the world
"Furness Controls has been innovating in the field of automatic leak detection for over 60 years..."
Leak testing FAQs
What is leak testing?
Leak testing checks that a sealed part or assembly holds pressure, so it won't let liquid or gas escape or get in during use.
How do you calculate a leak rate from a pressure drop?
Leak rate ≈ volume × pressure drop ÷ time, corrected to atmospheric pressure. For example, a 100 ml part losing 10 Pa over 5 s leaks about 0.12 ml/min. Our leak testers convert this automatically.
Can leak testing be automated?
Yes. Furness leak testers link to PLCs and production lines, with test times as short as milliseconds for small parts.
Do I need helium for sensitive leak tests?
Usually not. Differential pressure testing reaches about 0.01 ml/min with air alone. Helium is normally only needed for very fine leaks, such as refrigeration circuits.