The SS-7 series LVIT (Linear Variable Inductance Transducer) position sensors from Alliance Sensors Group have been designed to give cylinder position feedback in subsea environments with depths up to 12,000 ft or in a PBOF (pressure balanced oil filled) chamber; for oil and gas exploration, blow out preventers, ROVs, and relief valves.
The SS-7 requires no magnet and is based on a proprietary, contactless, inductive, sensing technology that employs a 7 mm diameter probe inserted into a target taube mounted inside of a gun drilled hole in the cylinder. The 1-inch diameter, 316 stainless steel housing comes with a subsea connector. They are offered in ranges from 1 to 36 inches (25 to 900 mm) full scale with a wide variety of analog I/Os and superior stroke-to-length ratio. The SS-7 sensors are also offered with 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)
- - Operational to 12,000 ft depth or 5000 psig (350 bar)
- - Contactless...No Wear from Cycling or Dithering
- - Proprietary SenSet™ for Field Adjustable Range Scaling
| 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: | 25 mm to 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 max. (350 bar) |
| Vibration: | 5-20 Hz 0.5 inch p-p; 20-2000 Hz 4.2 g p-p |
| Shock: | 1000 g, 11 msec. |
| Output | Probe | Range | Body Diameter |
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SS | X- | X- | XXX- | XX- | XX- | XX- | X |
| E -Voltage | 7 -7 | 025 - 250 (25 mm increments)
| 08 - 3/4-16 UNF | 06 - Macartney MCBH4M | 03 - 0 to 3 V DC | S - 316 SS |
| I - Current |
| 250-500 (50 mm increments) | 18 - M18 x 1.5 |
| 04 - 3 to 0 V DC |
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| 500 - 900 (100 mm increment) |
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| 05 - 0.5 to 4.5 V DC |
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| 06 - 4.5 to 0.5 V DC |
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| 10 - 0 to 10.0 V DC |
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| 11 - 10.0 to 0 V DC |
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| 20 - 4 to 20 mA DC |
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| 21 - 20 to 4 mA DC |
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| 50 - 0 to 5 V DC |
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| 51 - 5 to 0 V DC |
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4-Pin Connector | |
I/O Function | Pin |
+ Power Input | 1 |
Ground | 2 |
Analog Output | 3 |
SenSet™ | 4 |
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] |
175 mm | 7.0 [177.8] |
200 mm | 8.0 [203.2] |
225 mm | 9.0 [228.6] |
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] |
700 mm | 28.0 [711.2] |
750 mm | 30.0 [762.0] |
800 mm | 32.0 [812.8] |
900 mm | 36.0 [914.4] |
If you are looking for CAD drawings of our SS-7 sensor, simply call us at 856-727-0250 or use the online contact us form by clicking here.
Download SS-7 Series Linear Position Sensor Datasheet
