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Alliance Sensors Group introduced the SS-7 series LVIT (Linear Variable Inductive Transducer) designed for subsea environments and the demands of Oil and Gas Exploration.

The SS-7 is designed to be embedded into a hydraulic cylinder and utilizes the gun-drilled piston rod as a target, sensing it’s position without the need for a magnet. The SS-7 series can be submerged to a depth of 12,000 ft or installed in a PBOF (pressure balanced oil filled) chamber to provide position feedback on Blow Out preventers, ROVs and relief valves.

SS-7 sensors use a simple coil design rather than “time-of-flight” technology or resistive film. They are based on contactless LVIT inductive sensing technology that employs a solid probe construction style which requires only a conductive tubular target or a small diameter gun drilled hole in the cylinder rod for operation rather than needing a permanent magnet ring or some other type of special target, the company explained.

The SS-7 series, and its sister products ME-7, MR-7, and MHP-7, can withstand intense shock and vibration, and operating temperatures up to 105 C with the extended range option. The 1-inch (25.4 mm) diameter sensor head is compact making efficient use of space, mounting with a common male o-ring SAE-8 port threads, and has an excellent stroke-to-length ratio.

The SS-7 and all ASG LVITs are offered with 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.