LVDT sensor DF

Inductive displacement transducer in differential transformer circuit (LVDT), with perforated or threaded flange, suitable for pressurised applications, e.g. measurement on hydraulic components, valves, pistons and other machine parts where the displacement transducer is to be mounted outside the pressure chamber.

Important features

  • Nominal stroke: 6 mm up to 130 mm
  • Installation length: 70 mm up to 375 mm
  • Case diameter: 20 mm
  • Connections: Braided wire, axial cable
  • Carrier frequency: 5 kHz (option: 10 kHz)
  • Operating temperature: -20 ... 80 °C (option up to 120 °C)
  • Protection (DIN 40050): IP65

Technical data

    DF 6 DF 12 DF 20 DF 25 DF 50 DF 80 DF 100 DF 130
Nominal stroke mm ±3 ±6 ±10 ±12,5 ±25 ±40 ±50 ±65
Mechanical stroke mm 8 15 24 35 55 100 110 150
Dimension A mm 22 30 35 45 55 75 80 100
Dimension B mm 70 82 92 160 215 300 325 375
Sensor weight (approx.) g 160 200 220 400 450 600 650 750
Core weight (approx.) g 4 10 20 20 25 45 55 60
Max. operating pressure
(test pressure: +150 bar)
  300 bar 350 bar
Electrical connection**   Braided wire connection 250 mm Axial cable connection 2.5 m

* Specify options on order
**Other connection types possible on request

General properties

    DF 6 ... 130
Supply voltage Veff up to 5
Carrier frequency* kHz 5 kHz, option: 10 kHz
Static resolution virtually infinite
Linearity*  ±0,5 % F.S.O.
Option: 0,25 %
Temperature coefficient of zero ±0,1 % / 10 K
Temperature error of sensitivity ±0,15 % / 10 K
Operating temperature* -20 °C ... +80 °C, Option: up to 120 °C
Protection class according to DIN 40050 IP 65

* Specify options on order

Model list

    Abbr. DF DF
Measuring range 6 ... 130   6 ... 20 25 ... 130
Flange/
Connection variant
Hole flange Ø 40 / Braided wire none --
Hole flange Ø 50 / Axial cable K --
Hole flange Ø 50 / Radial cable Q --
Threaded flange /Braided wire S --
Linearity class
(FSO)
0,5 %  
0,25 %  
Carrier frequency 5 kHz  
10 kHz  
Options High operating temperature /120°C optional optional
Custom dimension A /Axx optional optional

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Dimensional drawings / Connection variants

Hole flange

with leads

lvdt sensor df hole flange with leads

Threaded flange

with leads

lvdt sensor threaded flange with leads

Hole flange

with axial cable (K)
with radial cable (Q)

lvdt sensor df hole flange with axial / radial cable

Electrical connection

  Leads K / Q
Connection type PTFE leads 250 mm long PTFE cable 2.5 m long
Pin configuration df-anschluss-litze df-anschluss-litze
Excitation + White White
Excitation - Blue Blue
Measuring signal + Red Red
Measuring signal - Black Black

 

Downloads

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