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 mobile 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 o-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 to match the range of motion of the cylinder rod.
Technical datasheets and additional information can be found below.
- - LVIT Technology™ (Linear Variable Inductance Transducer)
- - 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 0-900 mm (1 to 36 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: | 1000 g, 11 msec |
| Terminations: | IEC IP-67 |
| Humidity : | 95% RH, non-condensing |
| Output | Probe | Range | Port |
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| Housing |
MR | X- | X- | XXX- | XX- | XX- | XX- | X |
| E -Voltage | 7 -7 mm | 025 - 250 (25 mm increments)
| 08 - 3/4-16 | 00 - 1-m cable | 05 - 0.5-4.5 V | A - Aluminum |
| I - Current |
| 250-500 (50 mm increments) | 18 - M18 | 01 - 5-pin M12 | 06 - 4.5 to 0.5 V | S - 300 Series SS |
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| 500 - 900 (100 mm increment) |
| 10 - 0 to 10.0 V |
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| 11 - 10.0 to 0 V |
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| 20 - 4 to 20 mA |
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| 21 - 20 to 4 mA |
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| 50 - 0 to 5 V |
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| 51 - 5 to 0 V |
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Download LVIT Linear Position Sensor MR-7 Datasheet
