Redundant Sensors For Mobile Hydraulics

July 26, 2007
A new magnetostrictive position sensor is specifically designed to be embedded in welded and tie-rod style cylinders or similar space-limited cylinders.

A new magnetostrictive position sensor is specifically designed to be embedded in welded and tie-rod style cylinders or similar space-limited cylinders. Each measurement system comprises a basic sensor element and evaluation electronics with separate output signal and supply voltage. The two-sensor elements reside in a standard-size, pressure-resistant, stainless-steel pipe for direct stroke measurement in hydraulic cylinders. The sensor's pressure rod installs into an industry standard cylinder end cap and piston rod assembly. A position magnet marker, secured to the piston head, travels along the sensor rod without making contact. The redundant sensor outputs allow for checking the position measurement validity in a variety of ways. The measurement systems are completely independent and can be switched on individually. The Tempsonics MT sensor provides a measuring range of 50 to 1,500 mm. Linearity is less than 0.04% and repeatability is less than 0.005%.

MTS Sensors Div., 3001 Sheldon Dr., Cary, NC 27513, (919) 677-0100, mtssensors.com

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