Sensors measure the oxygen content of MAP packs
GEA
LeakCheck (photo) is a new in-line measurement system capable of checking seal and package integrity on all forms of modified atmosphere packs (MAPs). LeakCheck uses an in-line process on the company’s thermoformer to test the seal and package integrity on each individual MAP. The residual O2 content in each package is first measured with a fluorescent sensor spot printed on the inside of the top film. Optical sensors mounted on the thermoformer project light onto the sensor spot, gauging the wavelength of the light emitted by the dye to accurately determine the O2 content. Next, packages are subjected to over- and underpressure in a stress unit before a second contactless measurement is taken. If the new result differs from the first, the package seal is broken. — GEA AG, Düsseldorf, Germany