Patent ID: 7066033

Claim:
Transducer ( 1 ) for electrical measurement of positive and negative extensions on cylindrical or profiled bodies ( 6 ), the transducer comprising more than two pieces and being substantially annular, with at least one clamping element ( 7 , 15 ), where two clampable segments ( 2 , 3 ) each have, in their longitudinal centre on the inner contour ( 22 ) and lying opposite each other in the clamping direction (S), a recess for a protruding resilient part ( 8 ) with a measurement element ( 10 ) which is pressed by force onto the surface of the body ( 6 ), characterized in that diagonally opposed clampable segments ( 2 , 3 ) of the transducer ( 1 ) are clamped at both ends with at least one of interchangeable and adjustable side guide elements ( 4 , 5 , 26 , 38 ) for the body ( 6 ) to be measured, wherein the segments ( 2 , 3 ) are formed in yoke form, round or with multiple edges, which approximate to the form and size of the surface ( 13 ) of the body ( 6 ) but lie on this body ( 6 ) only in the area of the measurement element ( 10 ), where the faces ( 19 ) of the segments ( 2 , 3 ) have a spacing (a) of at least 30% of the spacing (b) of the measurement elements ( 10 ).