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Alliance - Model LVIT - MR-7 Series -Linear Position Sensor
The MR-7 Series LVIT (Linear Variable Inductance Transducer) Position Sensors from Alliance Sensors Group has been designed as an alternative to magnetostrictive sensors and has more robust construction and a lower cost of ownership. The unit can be port mounted in industrial or moble hydraulic cylinders and pneumatic actuators. These MR-7 Series sensors are based on a proprietary contactless inductive sensing technology that employs a 7 mm diameter probe with a shorter stroke-to-length ratio than most other technologies, and uses a gun drilled hole in the cylinder rod for sensing the rod position rather than requiring a ring magnet assembly.
An MR-7 has a 1.75 inch (44.5 mm) hex sensor head with a male o-ring port thread, so it can be mounted in the same SAE dash 8 or 18 mm 0-ring port as magnetostrictive sensors. Because they are contactless, MR-7 Series sensors do not wear out and have no signal deterioration over the life of the sensors, and because it uses an inductive coil, an MR-7 sensor can withstand much greater shock and vibrations than other technologies. One very useful element of the MR-7 sensors is ASG’s proprietary SenSet™ feature whereby a sensor’s analog output can be easily adjusted in the field after installation too match the range of motion of the cylinder rod. Technical datasheets and additional information can be found below.
- Hydraulic and Pneumatic Cylinders
- Mobile Hydraulic Equipment
- LVIT Technology™ (Linear Variable Inductance Transducer)
- Senses cylinder rod… No Magnet Required
- Easily adapts to existing cylinder designs
- Contactless sensing for long sensor life
- Proprietary SenSet™ for field scalability of analog output
- Analog I/Os: 0 – 5 V or 0.5 – 4.5 V output with 8 – 30 V input, 35 mA max. 0 – 10 V output with 12 – 30 V input, 35 mA max. 4 – 20 mA (3-wire) output with 18 – 30 V input, 60 mA max. (75 C max.)
- Measuring Ranges: 0-25 mm to 0-600 mm (1 to 24 inches) Full Scale (nominal)
- Linearity Error: ±0.15% of Full Scale Output (FSO) typical, ±0.25% of FSO max.
- Resolution: 0.025% of FSO
- Update Rate: 300 Hz nominal
- Operating Temperature: -20 to 85 C (-40 C to 105 C Extended Range)
- Temperature Coefficient: ≤±0.015% of FS/deg C
- Operating Pressure: 5000 psig (350 bar) max operating, 7500 psig (520 bar) proof
- Vibration: 5-20 Hz 0.5 inch p-p; 20-2000 Hz 4.2 g p-p
- Shock: 1000g, 11 msec
- Terminations: IEC IP-67
- Humidity : 95% RH, non-condensing