Abstract: A measuring device is described for measuring the gap and/or flush between two parts (70,71), comprising a housing (1) having a base (13) with an application face (14) which, in use, is placed on the surface of one of the parts (70). A probe (11) projects from the housing (1) and is movable against a return force (35) in the direction of the housing (1), the probe (11) being placed in use against the other of the parts. Electromechanical transducers (2,3) are disposed within the housing (1) for detecting the displacement of the probe (11). To avoid errors caused by improper positioning of the device on the parts (70,71), the base (13) is pivotably connected to the housing (1), and orientation sensing switches (63) are provided for sensing when the axis of the housing (1) is in a predetermined orientation in relation to the base (13).