Mocon Three-In-One Unit
With its new MultiCheck 300, Mocon, Inc. (www.mocon.com) is providing an all-in-one system for measuring leak detection, seal strength, and oxygen headspace. The unit marries its Lippke 4000 series for leak detection and seal strength testing with the Mocon hand-held Pac Check 302 oxygen headspace analyzer.
Tests are conducted automatically in sequence on one package. which reduces testing time while requiring half the number of package samples, says Ian Dantuma, senior engineer.
“What used to take three different tests on three different packages is now reduced to three tests on one package. A potential Mocon customer has estimated that with its production of 8 to 9 million packages per month, return on investment on 20 MultiCheck units would be as little as 14 months,” Dantuma says.
A septum with a pressure-sensitive adhesive back is applied to the package and provides an air tight seal for the probe. Gas drawn via the vacuum created by the Pac Check unit is passed through the probe to the instrument’s sensor. System software then switches a valve to begin leak detection followed by seal strength testing with creep and burst methods. For burst testing of porous packaging, the operator clicks on an option to call up an appropriate software algorithm.
As a component of the MultiCheck 300, “the Lippke 4500 provides package testing in compliance with ASTM F2095 (Standard Test Method For Pressure Decay Leak Test For Flexible Packages With or Without Retraining Plates). The data is recorded, the test is repeatable, and the subjectivity of the results is removed,” says Ed Emerson, market development manager, medical devices.
In internal testing for a customer, the system detected leaks to at least 12 micron. “As a general rule of thumb, a good pressure decay tester will have sensitivity to detect leaks areas between 10- 15 microns,” says Anthony Amed, product manager.
“The current configuration/specification of the Lippke 4500 does not provide precise hole size measurement. However, the instrument provides leak rate as expressed in pressure loss only which can assist in calculating theoretical hole size,” Emerson adds.
For large volume testing of pharmaceutical bottles for oxygen permeation transmission rates, Mocon has commercialized the OxyTraQ, a six-station, six-sensor system for sample conditioning.
“The OxyTraQ really comes into its own for conditioning bottles off line when a low grade barrier is desired. After bottles are conditioned, they can they be tested with an appropriate Mocon Ox-Tran instrument per ASTM standard. Companies can achieve a high throughput using this combination,” says Mike Howe, senior engineer.