LVDT sensor WTG / WTH
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 calibrated to 80mV/V with fully symmetrical coil construction 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 WTH version, the Probe has an 8 mm dia. clamping shank for mounting by means of a clamp/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
- Calibrated to 80mV/V for easy exchange
- Case diameter: 12 mm stainless steel
- Operating temperature: -50 ... 80 °C, option up to 120 °C
- Protection class (DIN 40050): IP 54
Technical data
WTG / WTH 2 |
WTG / WTH 5 | WTG / WTH 10 | WTG / WTH 20 | WTG / WTH 50 | WTG / WTH 100 | ||
Nominal stroke | mm | ±1 | ±2,5 | ±5 | ±10 | ±25 | ±50 |
Mechanical stroke | mm | ±1,5 | ±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 (appr.) | 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 | 80 | |||||
Sensitivity (approx.) | mV/V/mm | 80 | 32 | 16 | 8 | 3,2 | 1,6 |
Temperature coefficient of zero | ±0,05 % / 10K | ±0,02 % / 10K | |||||
Temperature coefficient of span | ±0,1 % / 10 K | ±0,05 % / 10K |
* Probe tip with M2,5 standard thread; probe tip can be released/exchanged by slightly warming
** Calibration accuracy: typically ±1 mV/V, max. ±3 mV/V
Properties
WTG / WTH 2 ... 100 |
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Excitation voltage | 1 ... 5 V | |||||
Carrier frequency | 5 ... 10 kHz | |||||
Linerarity* | 0,5 % F.S.O., option: 0,25 % und 0,1 % | |||||
Stroke marks on core rod (option)* | Option: zero mark (all models) and stroke ends (10 mm up) | |||||
Operating temperature* | -50 °C ... +80 °C, option: up to 120 °C | |||||
Protection class (DIN 40050) | IP 54 |
* Specify options on order
Model list
Abbr. | WTG / WTH | WTG / WTH | WTG / WTH | WTG / WTH | ||
Series |
WTG | |||||
WTH (8 mm shank) | ||||||
Stroke | 5 ... 100 | 2 | 5 | 10 | 20 ... 100 | |
Connection | Leads | none | -- | -- | -- | -- |
Axial cable | K | |||||
Radial cable | Q | |||||
Axial connector | LX | |||||
Radial connector | LR | |||||
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 | 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

Option /FB
Bellow on core rod (up to 10 mm)increased dim. A

Do you have further technical questions about the product?
We will be happy to help you determine the order code and provide you with further specific information for your required product.
Dimensional drawing / Connection types
Axial cable (K)
Core channel not continuous

Radial cable (Q)
Core channel not continuous
1) only WTH

Axial connector (LX)
Core channel not continuous

Radial connector (LR)
Core channel not continuous
1) only WTH

Electrical connection
Litze | K / Q | LX / LR | |
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 |
|||
Power supply + | Blue | Blue | 3 |
Power supply - | Red | Red | 2 |
Measuring signal + | White + Yellow | White | 1 |
Measuring signal - | -- | -- | -- |
Gegenstecker (wird mitgeliefert) |
-- | -- | LEMO FFA.1S.303CLAC52 |