The microohm meter PCE-MO 3001 is made to measure smallest electrical resistances. It uses four test cables that can be connected to the microohm meter. The microohm meter uses two test cables and a constant current source to allow stable current to flow within the measured device.
The PCE-PGM 100 gloss meter works with measuring geometries of 20°, 60° and 85°, using the reflection principle. This means that the gloss meter emits light which hits the surface to be tested. A part of the light will be absorbed by the surface and another part will be reflected.