Patent ID: 9091570
Filing Date: 2015-07-28
Classification: G01D,G01N

Abstract:
1. A retractable assembly, comprising: a housing, having a treatment chamber; a media connection with complementary connecting means, said media connection is arranged on said housing, and connects the retractable assembly with a containment filled with a medium; a drive; an immersion tube, which is movable by said drive axially at least between three positions, a process position extending out of said housing at least one intermediate position, and a service position in said housing; and a probe provided in the immersion tube, wherein: said probe has a probe head on its end facing the medium; in the service position, said probe head is arranged within said treatment chamber formed in said housing; said immersion tube is divided into three regions, an upper region facing away from the containment, a middle region, on which a sealing system is provided, and a lower region facing the containment; said sealing system is divided into three sections, an upper section, a middle section and a lower section; said sealing system is composed of two seals, the first seal is provided on the upper section of said sealing system, the second seal is provided on the lower section of said sealing system, and the middle section of the sealing system has a length L; said first seal and said second seal are arranged on the outside of said immersion tube; and said sealing system is so embodied that in no position of the immersion tube does an exchange of medium or impurities from said drive to said treatment chamber, or vice versa, occur.