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)
- - 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 0-900 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 |
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Output |
Probe |
Range |
Port |
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|
Housing |
Bore |
Bore |
MR |
X- |
X- |
XXX- |
XX- |
XX- |
XX- |
X |
XX- |
XX |
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E -Voltage |
7 -7 mm |
025 - 250 (25 mm increments)
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08 - 3/4-16 |
00 - 1-m cable |
05 - 0.5-4.5 V |
A - Alum. |
08 - 8 (25-100 ranges) |
AL - Alum. |
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I - Current |
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250-500(50 mm increments) |
18 - M18 |
01 - 5-pin M12 |
06 - 4.5 to 0.5 V |
S - 300 Series SS |
95 - 9.5 (125-200 ranges) |
AS - Alloy Steel |
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500 - 900(100 mm increment) |
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03 - 5-pin mini 7/8 |
10 - 0 to 10.0 V |
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11 - 11 (225-900) |
CS - Carbon Steel |
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11 - 10.0 to 0 V |
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SS - Stainless Steel |
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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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Wiring Table |
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I/O Function |
Pin |
Cable Color |
+ Power Input |
1 |
Red |
Ground |
2 |
Black |
Voltage output |
3 |
Green |
Current output |
4 |
Green |
SenSet™ |
5 |
White |
Nominal Range |
Dim. “A” In. [mm] |
25 mm |
1.0 [25.4] |
50 mm |
2.0 [50.8] |
75 mm |
3.0 [76.2] |
100 mm |
4.0 [101.6] |
125 mm |
5.0 [127.0] |
150 mm |
6.0 [152.4] |
200 mm |
8.0 [203.2] |
250 mm |
10.0 [254.0] |
300 mm |
12.0 [304.8] |
350 mm |
14.0 [355.6] |
400 mm |
16.0 [406.4] |
450 mm |
18.0 [457.2] |
500 mm |
20.0 [508.0] |
600 mm |
24.0 [609.6] |
750 mm |
30.0 [762.0] |
900 mm |
36.0 [914.4] |
If you are looking for CAD drawings of our MR-7 sensor, simply call us at 856-727-0250 or use the online contact us form by clicking here.