Abstract: The mountable contact element (1) for making an electrical contact with an external electrically conductive coating (22) on a nonconductive tube (20) on which the contact element is secured includes two contact rings (3,4) spaced axially from each other and each provided with interiorly extending contact brushes (5,6) peripherally encompassing the electrically conductive coating (22) and three axially extending ribs (7,8,9) spaced 120° C. from each other connecting the contact rings (3,4) mechanically and electrically conductively with each other and holding them spaced apart axially. The axially extending ribs (7,8,9) are connected to each other at a common connection point (10) on a threaded bolt (11). An ozonizer including the nonconductive tube (20) with the external electrically conductive coating (22) acting as a first electrode, a second external electrode separated from the first electrode with a dielectric and the contact element (1) is also described.

Abstract: A capillary viscometer in which the liquid meniscus is detected by sensing electrical resistance changes in hermetically sealed electrical resistors which are spaced apart at the two levels in the measuring tube in which the meniscus is to be detected. The resistors are encased in glass and the electrical leads to these resistors are passed through glass tubes to a cable connector.