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M12 Schaevitz™ LVDT

LVDT Series M12

The M12 Series layer-wound LVDTs offer premium performance at standard LVDT pricing. The M12 series are wound with state-of-the art, computerized winding machines on a ribless bobbin, resulting in the smooth transfer function required for the most demanding materials testing and position feedback applications. Precision distribution and tapering of the layer windings provide an excellent stroke to length ratio, without sacrificing sensor linearity.

A constant sum of the secondary output voltages, throughout the linear range, insures compatibility with ratiometric temperature compensation signal conditioning schemes for even lower temperature coefficients.

The M12 Series coil designs have been optimized to provide the lowest possible temperature coefficient of sensitivity, while maintaining suitability for operation with extended cable lengths. An internal high-permeability magnetic shield provides protection in the noisiest electromagnetic environments, while the high-quality AISI 304 Series stainless steel housing protects the LVDT from corrosion in aggressive environments. Vacuum coil impregnation and epoxy encapsulation ensure long term stability and protection from contaminants in the most hostile, high vibration applications.

Features

  • Small 12 mm diameter case
  • Low temperature coefficient of sensitivity
  • Excellent stroke to length ratio
  • Smooth transfer function
  • Constant sum of secondaries output voltages
  • Electromagnetic shielding
  • AISI 304 stainless steel case

Applications

  • Materials testing extensometers
  • Cylinder position feedback
  • Hydraulic spool valve position feedback
  • Roller gap positioning
  • Automotive suspension testing
  • Flight simulators
  • Aircraft flight control feedback

Specifications

Supply voltage:

3.0 Vrms

Linearity, max.:

±0.25 % of FS

Null voltage, max.:

0.5 % of FSO

Temperature coefficient of sensitivity:

100 ppm/°C

Operating temperature:

-55 … +150 °C

Test input frequency:

2.5 kHz

Shock survival:

500 g (11 ms half-sine)

Vibration tolerance:

20 g up to 2 kHz

Housing material:

AISI 304 Series stainless steel

Electrical connection:

6 lead-wires, 26 AWG, PTFE insulated, 0.3 m long

Model number Stroke Sensitivity Phase shift Impedance
 

mV/V

 

Input (PRI)

Output (SEC)

 

inch

mm

inch

mm

°

Ohm

Ohm

M12-10

±0.39

±10

1.07

42.0

+3

570

540

M12-20

±0.79

±20

0.54

21.2

+2

1100

400

M12-30

±1.18

±30

0.25

10.0

+2

1540

600

M12-50

±1.97

±50

0.25

9.9

+3

780

825

M12-100

±3.94

±100

0.18

7.1

-3

1000

1700

Notes:

  • All values are nominal unless otherwise noted
  • Electrical specifications are for the test frequency indicated in the table
  • FS: Full Scale is 2X for ±X stroke
  • FSO: Full Scale Output is the output at X position for ±X stroke

Wiring

Wiring of LVDT M12

COnnect green to blue for differential output.

Dimensions

Dimensions of LVDT M12
Dimensions of M12 core

Thread options:
- 1-72UNF 2-B (standard)
- M2 x 0.4 - 6H (metric)
Minimum depth 0.25 inch (6.35 mm)

All dimensions in inches, values in brackets in mm, approx. values.
These drawings are for information only and not intended for construction purpose. Please ask for detailed drawings.

Model number Dimensions, approx.
 

A

B

 

inch

mm

inch

mm

M12-10

2.64

67

1.42

36

M12-20

3.82

97

1.81

46

M12-30

4.61

117

1.81

46

M12-50

6.10

155

1.81

46

M12-100

11.22

285

2.95

75

Ordering Information

Specify the M12 Model followed by the desired option number(s) ordered together.

Option code Description

002

5.0 kHz calibration

006

Metric threaded core option (M2x0.4-6H threads)

008

5.0 kHz calibration and metric threaded core option