Product category:
Level Sensors and Leak Detectors
News Release from: Detectaids @ Allied Aerosystems | Subject: Leak detection
Edited by the Engineeringtalk Editorial
Team on 30 November 2000
Companies combine to improve leak
detection
Cooperation between two leak tester manufacturers has resulted in a new product that outperforms traditional designs.
Leak tester manufacturers are always trying to find smaller holes But their task is made more difficult the smaller the hole
This article was originally published on Engineeringtalk on 15 Aug 2000 at 8.00am (UK)
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For example, compared to a hole 2mm x 2mm, a hole 1mm x 1mm is four times more difficult to find because it is only a quarter of the size.
Any leak tester that works by measuring the loss of contents (e.g 99% of all leak testers used by blow moulders) will find it harder to detect the leak in a large container, because the rate of loss is lower.
For example, a 1 litre bottle with a leak that flows at 1 litre/min.
loses 100% of its content in a minute.
However, a 200 litre bottle with the same leak rate loses only 0.5% of its contents.
Now, co-operation between two leak tester manufacturers has resulted in a new product that outperforms traditional designs.
Blow Moulding Controls have modified their pressure decay drum leak tester to accept an ultrasonic leak sensor produced by Detectaids Ltd.
The combination of pressure sensing and ultrasonics has enabled the reliable detection of small holes at high line speeds.
Pressure sensing methods become less efficient as the container volume increases whereas the ultrasonic noise produced by a leak is totally unaffected by container size.
"Like many other companies, we have looked at ultrasonic leak testing and concluded it was not a complete solution to the needs of our customers" comments Robin Enderby, Managing Director of Blow Moulding Controls.
"In particular, the susceptibility of ultrasonics to ambient noise was one major concern.
Even systems boasting noise cancelling techniques could not be trusted to have 100% immunity." The Detectaids sensing system is based on 'listening' for a single pure frequency that is rarely found in ambient noise.
The solution was to use the Detectaids ultrasonic sensor to enhance the performance of a conventional pressure decay system.
The Detectaids system can be retrofitted to existing Blow Moulding Controls leak testers as well as supplied with new systems.
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