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LVDT sensor WT / WTA

Inductive displacement transducer for numerous industrial applications in production, inspection, quality assurance, test and laboratory. The Probe sensor with a Case diameter of 12mm has a coil unit with fully symmetrical coil design according to the LVIT differential choke principle / half-bridge circuit. The proven design guarantees high temperature stability with very low temperature drift and very good linearity. The precision bearing enables high load cycles with very low wear. In the WTA version, the Probe has a front-mounted Ø8mm clamping shaft for mounting by means of clamping / clamping flange. Numerous versions are available with different connections of plugs and cables, as well as for operation of increased temperature.

Special versions according to customer specifications are possible.

Important features

  • Nominal stroke: 2 mm up to 100 mm
  • Mechanical stroke: 1.6 mm up to 52 mm
  • Case diameter: 12 mm
  • Operating temperature: -50 ... 80 °C, option up to 120 °C
  • Protection class (DIN 40050): IP 54

Technical data

    WT / WTA 2
 WT / WTA 5 WT / WTA 10 WT / WTA 20 WT / WTA 50 WT / WTA 100
Nominal stroke mm ±1 ±2,5 ±5 ±10 ±25 ±50
Mechanical stroke mm ±1,6 ±3,5 ±6 ±11 ±26 ±52
Dimension A mm 8 12 15 20 35 65
Dimension B mm 80 87 140 172 250 410
Spring force at centre position (approx.) N 0,7 0,8 1,1 1,5 2,7 2,7
Spring constant (approx.) N/mm 0,045 0,056 0,040 0,067 0,085 0,050
Sensor weight (approx.) g 40 50 80 90 130 200
Core weight (approx.)* g 5 6 12 15 18 28
Nominal output (approx.) mV/V 48 120 100 150 225 300
Sensitivity (approx.) mV/V/mm 48 48 20 15 9 6
Temperature coefficient of zero   ±0,05 % / 10 K ±0,02 % / 10 K
Temperature coefficient of span   ±0,1 % / 10 K ±0,05 % / 10 K
* Probe tip with M2,5 standard thread; probe tip can be released/exchanged by slightly warming up thread locker

Properties

  WT / WTA 2 ... 100
Excitation voltage (rms) Up to 5 V
Carrier frequency 5 ... 10 kHz
Linearity 0,5 % F.S.O., option: 0,25 % and 0,1 %
Stroke marks on core rod (option)* Option: zero mark (all models) and stroke ends (10 mm up)
Operating temperature* -25 °C ... +80 °C, option: up to 120 °C
Protection class (DIN 40050) IP 54
* Specify options on order

Model list

    Abbr. WT / WTA WT / WTA WT / WTA WT / WTA
Series WT  
WTA (8 mm Schaft)  
Stroke 2 ... 100   2 5 10 20 ... 100
Connection Leads none -- --
Axial cable K
Radial cable Q
Radial connector LR
Axial connector LX
Linearity (FSO) 0,5 %  
0,25 %  
0,1 %   --
Options
 High operating temperature 1) /120°C optional optional optional optional
Stroke marks on core rod
(see picture)		 /M optional 2) optional 2) optional optional
PTFE cable 3) /TF optional optional optional optional
Reduced spring force /GF optional optional optional optional
Bellow 4) (see picture) /FB optional optional optional --
Customised dimension A /A xx optional optional optional optional
Probe tip not glued /NV optional optional optional optional

1) PTFE cable with versions K and Q
2) zero mark only
3) with versions K and Q only
4) not with option /M and not with /120°C

Options

Option /M

Stroke marks on core rod

lvdt sensor wt wta core rod detail

Option /FB

Bellow on core rod (up to 10 mm)

increased dimension A

lvdt sensor wt wta probe tip detail

Dimensional drawings / Connection variants

Leads ( )

Core channel not continuous

dimensional drawing wt wta leads

Axial cable (K)

Core channel not continuous

dimensional drawing wt wta axial cable

Radial cable (Q)

Core channel not continuous

1) only WTA

lvdt sensor wt wta radial cable

Axial connector (LX)

Core channel not continuous

dimensional drawing wt wta axial connector

Radial connector (LR)

Core channel not continuous

1) only WTA

dimensional drawing wt wta radial connector

Electrical connection

  Leads K / Q LR / LX
Type of connection
 PTFE leads 250 mm long PE-cable 2,5 m long
Option: PTFE cable		 LEMO ERA.1S.303.CLL
(Mating plug supplied)
Pin configuration
 wta pin configuration leads wta pin configuration cable connector lr lemo
Power supply + Blau Blau 3
Power supply - Rot Rot 2
Measuring signal + Weiß + Gelb Weiß 1
Measuring signal - -- -- --
Mating plug
(supplied)		 -- -- LEMO FFA.1S.303CLAC52

Downloads

icon-pdf-blueProduct data sheet

icon-pdf-blueProduct data sheet (80mV/V)

icon-pdf-blueInstallation / technical information

icon-pdf-blueProduct group overview

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