LVDT sensor DK

Robust inductive universal displacement transducer for measuring ranges from 2mm to 250mm for numerous industrial applications in hydraulic cylinders, valves, production and mechanical engineering. The cost-effective displacement transducer with a Case diameter of 20mm has a coil unit with fully symmetrical coil design according to the LVDT differential transformer principle / full bridge circuit. Versions with different connections of plugs and cables as well as for operation of different Carrier frequencies and with increased dynamics are available.

Important features

  • Nominal stroke: 2 mm up to 250 mm
  • Installation length: 30 mm up to 510 mm
  • Case diameter: 20 mm
  • Connections: Braided wire, axial cable, radial cable
  • Carrier frequency: 5 kHz (option: 10 kHz)
  • Operating temperature: -50 ... 80 °C
  • Safety class: IP 64

Technical data

    DK 2 DK 5 DK 10 DK 20 DK 25 DK 50 DK 100 DK 150 DK 200 DK 250
Nominal stroke mm ±1 ±2,5 ±5 ±10 ±12,5 ±25 ±50 ±75 ±100 ±125
Mechanical stroke mm 5 10 15 25 35 60 110 160 210 260
Dimension A mm 30 40 40 40 40 50 100 130 150 180
Dimension B mm 30 45 80 90 120 165 255 330 420 510
Inner diameter D mm 6 6 4, option: 8
Sensor weight (approx.) g 50 70 120 130 170 230 350 460 580 700
Core weight (approx.) g 3 4 6 7 8 10 16 20 25 30

Properties

    DK 2 ... 250
Supply voltage Vrms up to 5
Suitable carrier frequency* kHz 5 kHz, Option: 10 kHz
Linearity error*  ±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* -50 °C ... +80 °C
Protection class according to DIN 40050 IP 64

* select option when ordering

Overview of types and options

    Abbr. DK DK
Measuring range see technical data   2 ... 5 10 ... 250
Connection Axial leads none
Radial leads QL -- optional
Axial cable 1) K -- optional
Radial cable Q -- optional
Radial connector 2) R -- optional
Linearity (FSO) 0,5 %  
0,25 %   -- optional
Carrier frequency
5 kHz  
10 kHz /10k optional
Options

temperature and oil resistant PTFE cable /TF -- optional
6-wire-option /6 -- optional
Ø 8 mm bore hole 3) 4) /D8 -- optional
Customised dimension A /Axx optional optional

1) Core channel non-continuous
2) Mating connector supplied
3) after consulting MESSOTRON
4) not available for /K, /Q, /R

Dimensional drawings / connections

Axial leads ( ) and radial leads (QL)

Core channel continuous

dimensional-drawing-dk-lead

Axial cable (K)

Core channel not continuous

dimensional-drawing-dk-cable-axial

Radial cable (Q)

Core channel continuous

dimensional-drawing-dk-cable-radial

Radial connector (R)

Core channel continuous

dimensional-drawing-dk-connector

Connection

  Leads Leads 6-wires K / Q R
Type of connection PTFE leads AWG 26
250 mm long
PTFE leads AWG 26
250 mm long
PE-cable 2,5 m long
Option: PTFE cable
Amphenol C 091 connector
Pin configuration dk-connection-braid dk-connection-braided-6-wire df-connection-braid dk-connector
Excitation + Brown White White 2
Excitation - Blue Blue Blue 3
Measuring signal + Red Red Red 1
Measuring signal - Black Black Black 4
Tap Sek 1 -- Green -- --
Tap Sek 2 -- Yellow -- --
Mating connector
(supplied)
-- -- -- Amphenol C 091

 

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