World novelty: Durable position measurement of hydraulic pistons - PVDF sensors can measure piston positions durably and inexpensive. By several one behind the other arranged sensors piston positions can be seized quasi-similarly.
The patented procedure for the position control of pistons in hydraulic cylinders made a new generation possible of Low Cost sensors. So far position measurements for pistons in hydraulic cylinders are made by laterally attached ultrasonic sensors with ceramic(s) oscillators. In addition usually modified sensors become, how them admit from the material testing (NDT) are used.