The MW 210-13-3-S is designed for non - contact measurement of the distance between the end face of a pickup and the conductive surface of a target. Pickup and target form a capacitor. The dielectric must be defined, its loss must be negligible. The distance - meter is calibrated in units of length for materials with a relative dielectric constant of e_r = 1 and it is equipped with an indicating instrument and a digital - scale potentiometer for each of its two channels. The indicating instrument makes possible the use of the deflection method for static measurements. For static and dynamic measurements an output terminal for indicating and recording instruments provides a voltage which is proportional to the distance measured. The potentiomter allows a defined zero - suppression of the output voltage.