GT Precision LVDT Gauging Transducer

Very high accuracy
Precision linear bearings
Miniature
High cycle life
Stainless steel
Infinite resolution



RDP LVDT How it Works

   Data sheet (225kb)
These transducers are for displacement / position measurement. They make an accurate position measurement of the movement of the armature (the sliding part) relative to the body of the displacement transducer.

This transducer uses the Linear Variable Differential Transformer (LVDT) principle which means that it is probably the most robust and reliable position sensor type available. The strength of the LVDT sensor's principle is that there is no electrical contact across the transducer position sensing element which for the user of the sensor means clean data, infinite resolution and a very long life.

The GT series gauging transducer employs precision linear bearings to optimise the LVDTs measurement precision and repeatability.

LVDT transducers require external signal conditioning as detailed in the 'Electronics' section of this website.

Spring return version.
Our spring displacement transducer has bearings to guide the armature inside the measurement sensor and a spring which pushes the armature to the fully out position. Spring return LVDTs are appropriate where it is not possible to connect the transducer armature to the moving component being measured.

End (axial) exit cable.Connection details
  D1= 8.0mm
Type Range Linearity error (% F.S.) L X (nom) B- (No clamp zone) Total weight Spring force (nom) Over-Travel Sensitivity (nom)
Spring force at X Spring rate Inward over-travel Outward over-travel
GT0500Z ±0.5mm <±0.25 26mm 7mm 6mm 7g 1.0N 1.7N/cm 0.3mm 0.3mm 110mV/V
GT1000 ±1mm <±0.25/±0.1 53mm 14mm 14mm 11g 0.8N 2.6N/cm 1.4mm 0.3mm 150mV/V
GT2500 ±2.5mm <±0.25/±0.1 58mm 20mm 18mm 13g 1.1N 2.6N/cm 0.8mm 0.3mm 375mV/V
GT5000 ±5mm <±0.25/±0.1 87mm 22mm 30mm 16g 1.5N 1.5N/cm 1.3mm 0.3mm 700mV/V

Side (radial) exit cable.Connection details
  D1= 8.0mm
A= 6mm
Type Range Linearity error (% F.S.) L X (nom) B- (No clamp zone) Total weight Spring force (nom) Over-Travel Sensitivity (nom)
Spring force at X Spring rate Inward over-travel Outward over-travel
GT0500XRA ±0.5mm <±0.25 33mm 7mm 6mm 7g 1.0N 1.7N/cm 0.3mm 0.3mm 110mV/V
GT1000RA ±1mm <±0.25/±0.1 57mm 14mm 14mm 12g 0.8N 2.6N/cm 1.4mm 0.3mm 150mV/V
GT2500RA ±2.5mm <±0.25/±0.1 61mm 20mm 18mm 16g 1.1N 2.6N/cm 0.8mm 0.3mm 375mV/V
GT5000RA ±5mm <±0.25/±0.1 91mm 22mm 30mm 21g 1.5N 1.5N/cm 1.3mm 0.3mm 700mV/V

Air push version.
The air-push version of the GT displacement transducer is extended by the application of air to the displacement transducer and is retracted by an internal spring. This is useful where the LVDTs position measurement tip must be retracted to allow components to move on a conveyor for example.

End (axial) exit cable.Connection details
AL = 8mm
AD = 3mm
D1 = 8.0mm
Air filter = <0.0005mm
Relative humidity = <60%
Type Range Linearity error (% F.S.) L X (nom) B- (No clamp zone) Total weight Air pressure Over-Travel Sensitivity (nom)
Minimum Maximum Inward over-travel Outward over-travel
GT1000P ±1mm <±0.25/±0.1 72mm 26mm 14mm 11g 40kPa 65kPa 1.4mm 0.3mm 150mV/V
GT2500P ±2.5mm <±0.25/±0.1 77mm 20mm 18mm 13g 45kPa 65kPa 0.8mm 0.3mm 375mV/V
GT5000P ±5mm <±0.25/±0.1 112mm 22mm 30mm 16g 45kPa 55kPa 1.3mm 0.3mm 700mV/V


Specification

Excitation/supply (acceptable)0.5V to 7V rms, 2kHz to 10kHz (sinusoidal) Temperature coefficient (span) ±0.01% F.S. /C (typical)
Excitation/supply (calibrated)5V rms, 5kHz (sinusoidal) Operating temperature range -40C to 100C
Output load100k Ohms Electrical termination 2m (integral cable) Longer available to order.
Repeatability0.00015mm    


Options and accessories

Alternative probe tips for LVDTs
Mounting block
E74 In-Line Signal Conditioning Amplifiers
Electronics


All dimensions and specifications are nominal. www.rdpe.com/ex/gt.htm 20170119
Due to our policy of on-going development, specifications may change without notice. Any modification may affect some or all of the specifications for our equipment.
 
USA & Canada
RDP Electrosense
2216 Pottstown Pike
Pottstown, PA 19465
USA
Tel: 610-469-0850
Tel: 800-334-5838
Fax: 610-469-0852
Email: info@rdpe.com
Rest of the world
RDP Electronics Ltd
Grove Street, Heath Town
Wolverhampton, West Midlands, WV10 0PY
United Kingdom

Tel: +44 1902 457512
Fax: +44 1902 452000
Email: sales@rdpe.com
URL: www.rdpe.com

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