Sensor to register expansion/contraction, at machinery surfaces, has movement-sensitive components with elastic cushions pressed against the surface in a friction grip

摘要

The sensor, giving electrical measurements of surface expansion/contraction in machinery components, has components (4) sensitive to movements on elastic cushions (6) in the sensor housing (1) against laying surfaces (3). One or more tensed strips (17) around the housing apply a defined pressure on the elastic cushions. The sensitive components, covered with a protective film, are pressed against the monitored surface (16) in a friction grip without slipping and without signal loss. An electronic amplifier (9) is within the housing, or is mounted externally'