The PGK 20 with its integrated datum plane stands out for its smooth traverse and low-vibration design. The housing, the bottom of which is in the form of a prism, is compact and robust. The PGK features a motor-driven height adjustment for lowering and lifting the pick-up and for setting it to zero automatically. Any single-skid, dual-skid or skidless pick-up of type M or R can be connected. In conjunction with the skidless pick-ups MFW-250 and RFHTB, roughness, waviness and form deviations can be assessed. With the PGK 20, hand-held, desktop or measuring stand operation and measurements in normal or upside down position are possible.
Due to its design, measurements can be taken inside tubes and bores. For diameters larger than 68 mm (2.68 in), the drive unit can be inserted completely, while for smaller diameters only the front part with its prismatic bottom and integrated pick-up protection can be inserted.

The inclination adjustment screw aligns the datum plane with respect to the surface to be traced. The motor-driven height adjustment automatically changes the total position of the pickup such that the stylus tip remains in the middle of the measuring range.
With the support prism, the PGK 20 drive unit can be used for plane and cylindrical workpieces. For diameters of up to 72 mm (2.834 in), it is centered on the continuous prism. For larger diameters and plane surfaces, the integrated support feet are used. For upside down measurements, the prism can be used for carrying cylindrical workpieces with diameters from 1 mm to 72 mm (.0394 in to 2.834 in).

Whenever a measurement is started, the motor-driven height adjustment lowers the pick-up onto the workpiece. After the measurement the pick-up is lifted off and moved to a protected position. Then the return travel, which ends in the initial position, is carried out with the pick-up remaining in this protected position.