Product description The differential pressure method
EN 3925-0060 V207-00 MANUAL R03.doc 15
HeMaTech
Prüftechnik
Product description
The Leak Tester 3925 - 0050 is a device for pneumatic and thus non-corrosive leak
testing of series production parts, such as fittings, pump housings, cylinder blocks,
vacuum controls, batteries and many more. Its function is based on the differential
pressure method.
The differential pressure method
This method is particularly suitable for use in series production, because it can be easi-
ly automated with sufficient accuracy.
The test medium is low cost compressed air. Due to its low viscosity it can pass
through existing porosities and other leak points with sufficient speed. The test does
not generate any dirt. Cleaning and drying as well as corrosion protection measures
are not required. Maintenance of the measuring system is unproblematic. Prerequisite
for this method is the leak tightness of measuring system and testing device.
As already indicated by the name differential pressure method, the pressure difference
in the measuring branch caused by a leak in the specimen is compared with the pres-
sure in the blocked off reference branch.
Function schematic of differential pressure test
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