Linear position sensor uses ONDA technology

Gefran has launched its ONP1-A magnetostrictive linear position sensor range featuring the company's ONDA magnetic sensitive element measurement system.

ONDA technology combines a highly sensitive wave measuring element for current or voltage output of both displacement and speed from a simple magnetic cursor.

According to Gefran, the contactless measurement system is characterised by simplicity in installation and long life with high accuracy and repeatability in an affordable design - even for applications that do not require 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 four-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.

Steel mounting brackets are optionally available that match the anodised rail profile and mating DIN 43650 connectors rated to IP65 with flying leads are also offered.

With more than 30 electrical stroke lengths available from 50mm to 1,500mm, the high bandwidth ONDA measurement system has a resolution that is limited only by the sensitivity of the measuring system, an independent linearity of better than 0.04 per cent of full scale and maximum acceleration up to 100m/s2.

With both voltage and current output signals available, the unit requires a 24V DC input and is fully protected against polarity inversion and over voltage.

The design of the ONP1-A allows for a shock rating of 100G for 11ms and vibration to 12G between 10 and 2,000Hz.

The operational temperature range is from -20 to +75C.

Back to top