LVIT Linear Position Sensor MR-7 Series

For Use In
Hydraulic and Pneumatic Cylinders
Mobile Hydraulic Equipment
MR-7 Series
LVIT Linear Position Sensor
Lower Cost, More Robust Alternative to Magnetostrictive Sensors

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 inserted into a target tube mounted inside of a gun-drilled blind hole in the cylinder rod.

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.

Features
  • - 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
Specifications
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
Ordering Info Table


Series

Output
Type

Probe
Dia.

Range
(mm)

Port
Thread


Termination


Output

Housing
Material

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

 

 

 

500 - 900

(100 mm increment)

 

 

10 - 0 to 10.0 V 

 

 

 

 

 

 

 

11 - 10.0 to 0 V 

 

 

 

 

 

 

 

20 - 4 to 20 mA

 

 

 

 

 

 

 

21 - 20 to 4 mA

 

 

 

 

 

 

 

50 - 0 to 5 V 

 

 

 

 

 

 

 

51 - 5 to 0 V