Abstract: An unlocking apparatus for unlocking locking devices of at least two medical ring instruments, and a sieve basket. The locking devices include cooperating locking elements, and the unlocking apparatus includes a first receiving body with at least two ring receptacles for accommodating first rings of the at least two ring instruments. The unlocking apparatus includes an unlocking body with at least two unlocking elements cooperating with second rings of the at least two ring instruments. The unlocking body and the receiving body are movable relative to one another in an actuating direction such that the at least two unlocking elements engage on and move the second rings relative to the first rings in an unlocking direction that is transverse, in particular perpendicular, to a first ring plane and to a second ring plane for transferring the locking devices from a locked position into an unlocked position.

Abstract: A reference test body for monitoring and/or verifying test conditions during a test of microbial barrier properties of at least one product, wherein the reference test body has a cavity, a nutrient medium, at least one opening, and at least one cover provided with a number of holes and covering the at least one opening. A constancy of test conditions can be monitored in this way. The invention further relates to an associated use, an associated test chamber, and an associated method.

Abstract: A reference test body for monitoring and/or verifying test conditions during a test of microbial barrier properties of at least one product, wherein the reference test body has a cavity, a nutrient medium, at least one opening, and at least one cover provided with a number of holes and covering the at least one opening. A constancy of test conditions can be monitored in this way. The invention further relates to an associated use, an associated test chamber, and an associated method.

Abstract: A test chamber for the microbial and/or a particulate barrier testing of a number of products, the test chamber having a test space which has, at least along a straight section, an inner extent of at least 1.5 m. As a result, a particularly homogeneous microbe and/or particle distribution is achieved. The invention also relates to an associated use and to an associated method.