A magnetostrictive linear position sensor range featuring the ONDA magnetic sensitive element measurement system has been introduced by Gefran – the ONP1-A.

ONDA technology combines a highly sensitive wave measuring element for current or voltage output of both displacement and speed from a simple magnetic cursor. The contactless and durable measurement system is said to be characterised by simplicity of installation and extremely long life with very high accuracy and repeatability in an affordable design – even for applications that do not require such high levels of precision.

For the ONP1-A linear position transducer the measurement element runs in an IP65 protected extruded aluminium rail with a robust 4-pin solenoid valve connector built into one end. The magnetic cursor requires no electrical power and can be supplied as a simple floating component that is fixed on the customer’s machine or alternatively in a housing that mounts parallel to the rail in a choice of three configurations with different axial connections. In all configurations the alignment is not critical and the cursor may be fixed with the rail moving or vice versa. Optional steel mounting brackets that match the anodised rail profile and mating DIN 43650 connectors rated to IP65 with flying leads are available.

With electrical stroke lengths from 50mm to 1500mm, the ONDA measurement system has a resolution limited only by the sensitivity of the measuring system, an independent linearity of better than 0.04% of full scale and maximum acceleration of up to 100m/s2, says the company.