Alliance Sensors Group announces the MR Series of Linear Position Sensors for use in measuring the ram position of hydraulic and pneumatic cylinders.
The MR Series is designed to be a drop-in form, fit, and function replacement for magnetostrictive sensors but with much more robust construction and a lower cost of ownership, specifically targeting port-mounted applications of industrial, mobile, or subsea hydraulic cylinders and large pneumatic actuators. MR Series sensors are based on a patented contactless inductive sensing technology that employs a solid probe construction style which requires only a simple conductive tubular target or a small diameter deep hole gun drilled in the cylinder rod for operation rather than needing a permanent magnet ring or some other type of special target.
Because these sensors use a simple coil design rather than “time-of-flight” technology, the MR Series sensors can withstand intense shocks and vibration, and operating temperatures up to 85 C for standard products and 125 C for custom units. Resembling a magnetostrictive sensor with its sensor head and male o-ring port threads, an MR sensor has a shorter stroke-to-probe length ratio and can thread into the same o-ring bosses (either SAE J1926-8 or ISO 6149-1 M18) that accept a magnetostrictive sensor. For those applications where an MR is replacing an existing magnetostrictive sensor, the magnet ring can usually be left in place without affecting the performance of the sensor.
MR Linear Position Sensors are available in full ranges from 2 inches to 36 inches (50 mm to 900 mm) with either an analog DC voltage or current output, a linearity error of less than or equal to ±0.1% of Full Scale Output, and a -3dB frequency response of 500 Hz. Being contactless, MR Series sensors are not subject to wear and show no output signal deterioration over the life of the sensors. The probes are offered in diameters of 7 mm (MR-7) for industrial use and 11 mm (MR-11) for heavier duty or larger cylinder applications. The MR Series comes standard with a 4-pin M-12 connector or 5-pin DIN connector, or with a 4-conductor cable, but other connectors and cable options are available.
The IP-67 sealed housing uses no trimmer pots for setting Zero and Full Scale. Instead, ASG’s proprietary SenSet™ calibration feature permits the user to match the analog output of the sensor to the motion of the actuator or cylinder on a stand-alone basis rather than the user having to scale the sensor’s basic output in an associated control system.
Alliance Sensors Group
www.alliancesensors.com
