The Pioneer of Modern Leak Testing

Four Channel Sequential Leak Test with SprintmD

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Multi-part assemblies or parts with several discrete cavities present challenges for their manufacturers. Each pathway must be leak free and importantly there must be no cross-talk between cavities. To maintain throughput, it might be necessary to employ several leak testers or create a complicated system using a PLC and several different pneumatic circuits.

The SprintmD four channel sequential tester incorporates everything necessary for testing multiple parts or cavities in one space saving and easy to use package. This versatile leak tester can perform four leak tests in sequence by using the pressure decay leak test technique.

By programming the tester according to the leak test requirements SprintmD can perform four tests on four independent products or four identical products. Optional flow measurement or burst test options are available.

How It Works.

1. Product is attached to each test port.  (Figure 1)  SprintmD’s test program is started

2. Product (P1 to P4) is sealed to block openings for pressure decay testing.

3. Air is supplied at test pressure to SprintmD’s output Port 1 through valves Va and V1.  Pressure is measured at the pressure sensor PS.  Valves V2, V3 and V4 can be opened to atmosphere for occlusion testing.

4. Each additional part can be tested in sequence.

5. With the flow option, SprintmD opens valves Vb and Vc and measures the flow rate through the flow sensor at FS.

5b. Optionally, SprintmD can perform a burst test by opening valves Vb and Vc, then ramping up the test pressure through the variable flow control at FC.


SprintmD can have either the mass flow OR the bust option installed in addition to pressure decay leak test.  Both flow and burst options might be possible depending on the test parameters, and would be a custom machine.

Pressure Decay Leak Test

SprintmD looks for a drop in pressure over time.  This is the basic SprintmD testing mode.  One of two options can be added to the basic tester.  (Figure 2)

Flow Test

As one option, SprintmD can be fitted with a mass flow measuring option.  This allows the user to test the flow rate through multiple pathways or to test the flow through four individual products in sequence.

Burst Test

As another option, SprintmD can be fitted to perform a burst test in addition to a pressure decay test.

In a burst test, pressure in the product is slowly increased through a precision flow control valve.  Sprint then captures the pressure at which the product bursts open or begins to flow rapidly.


SprintmD is ideal for testing products that have multiple parts or multiple passages (up to four) that can be tested in sequence.

In addition, the model 4P can be used to test as many as four individual products in sequence.

If a product with fewer ports needs to be tested, SprintmD models are available in two and three channel configurations.

Sequential testing is often recommended when operator pacing is desired.  The operator can load one test port while the others are being tested.

We invite you to call Uson to discuss how a SprintmD four-channel sequential tester can be applied to your specific testing needs.


                * Tests products in one integrated sequence.

                * Ideal for operator pacing.

                * Can test for both leak and occlusion

                * Tests 1, 2, 3, or 4 parts in sequence

                * Fully calibrated and simple to maintain

                * Options for flow rate or burst testing

                * Small footprint of 8.5 by 14 inches

                * User-selectable engineering units

                * Easy to program and calibrate

                * Large, menu-driven display

                * Interface for statistical process control

If you have a complex leak or flow testing application that you could use some help with please contact me at 281-671-2000 or email me at

Joe Pustka

Director Applications Engineering

Contact Us


Uson L.P. - Corporate

8640 N. Eldridge Parkway
Houston, TX 77041 USA

Tel: +1-281-671-2000
Fax: +1-281-671-2001


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Fraser, MI 48026 USA

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