Abstract: Instrument for measuring thickness of coatings on substrate based on space-dependent, electromagnetic interaction between a measuring probe resting against the coating and the substrate comprising a compensating probe, a comparison body with properties similar to that of the substrate, a mechanism for adjusting the spacing of the compensating probe from the comparison body, until the same electromagnetic interaction is obtained as for the measuring probe and the substrate and a device for displaying the spacing between the compensating probe and comparison body.

Abstract: A housing forms a chamber having a bottom wall, and a discharge tube communicates with the chamber in the region of the bottom wall, being upwardly inclined exteriorly of the housing and having a free end insertable into a dispensing opening of a container. A dispensing tube extends from the interior of the chamber through the bottom wall to the exterior of the housing, and an arrangement is provided for dispensing via the dispensing tube metered quantities of liquid which enter the chamber from the container through the discharge tube.