LDC Series DC to DC LVDT Displacement Transducer

High accuracy
High cycle life
Low supply voltage
Input/output isolation
High resolution
Voltage output
Stainless steel


How it Works - Dc LVDT

   Data sheet (230kb)
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.

Our DC to DC LVDT transducer has all of the benefits of the LVDT sensor principle with the added convenience of built-in LVDT electronics enabling a dc supply and dc output.

This series of displacement transducer is available as either an unguided, captive or spring return version.

Unguided version..
On our unguided LVDTs the armature assembly is a separate component, to make a measurement the user must guide the armature inside the body without touching the sides. Unguided position measurement transducers are appropriate where external guidance is available and give truly non-contact operation
A=9mm
D1=20.6mm
ID=6.8mm
D3=4.75mm
D4=5.97mm
TF=M5x0.8
Type Range Linearity error (% F.S.) L X (nom) Total weight Armature weight TF Over-Travel
Inward over-travel
LDC500 ±12.5mm <±0.5/±0.25/±0.1 175mm 43mm 213g 17g 15mm 16mm
LDC1000 ±25mm <±0.5/±0.25/±0.1 203mm 69mm 270g 23g 15mm 22mm
LDC2000 ±50mm <±0.5/±0.25/±0.1 317mm 81mm 369g 37g 15mm 16mm
LDC3000 ±75mm <±0.5/±0.25/±0.1 430mm 120mm 497g 55g 15mm 29mm
LDC4000 ±100mm <±0.5/±0.25/±0.1 475mm 132mm 625g 71g 15mm 16mm
LDC6000 ±150mm <±0.5/±0.25 666mm 183mm 852g 100g 15mm 16mm
LDC8000 ±200mm <±0.5/±0.25 856mm 259mm 1.3kg 140g 29mm 27mm

Captive guided version..
Our captive guided displacement transducer has bearings to guide the armature inside the measurement sensor. Captive LVDTs are for position measurement applications where guidance may be poor and end bearings may be required.
A = 23mm
D1 = 20.6mm
TR = M5x0.8 / 11mm
TF = M5x0.8
Type Range Linearity error (% F.S.) L X (nom) D3 Total weight TF Over-Travel
Inward over-travel Outward over-travel
LDC500C ±12.5mm <±0.5/±0.25/±0.1 194mm 38mm 4.75mm 340g 15mm 10mm 12mm
LDC1000C ±25mm <±0.5/±0.25/±0.1 222mm 63mm 4.75mm 398g 15mm 13mm 10mm
LDC2000C ±50mm <±0.5/±0.25/±0.1 336mm 76mm 4.75mm 511g 15mm 10mm 14mm
LDC3000C ±75mm <±0.5/±0.25/±0.1 448mm 114mm 4.75mm 625g 15mm 24mm 15mm
LDC4000C ±100mm <±0.5/±0.25/±0.1 494mm 127mm 4.75mm 767g 15mm 8mm 14mm
LDC6000C ±150mm <±0.5/±0.25 684mm 178mm 4.75mm 1.0kg 15mm 12mm 17mm
LDC8000C ±200mm <±0.5/±0.25 875mm 254mm 4.75mm 1.4kg 32mm 22mm 25mm
LDC10000C ±250mm <±0.5/±0.25 1067mm 305mm 4.75mm 1.7kg 27mm 34mm 35mm
LDC15000C ±380mm <±0.5 1473mm 406mm 4.75mm 2.2kg 19mm 13mm 13mm
LDC18500C ±470mm <±0.5 1740mm 508mm 6.00mm 2.6kg 27mm 5mm 33mm

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.
A=9mm
D1=20.6mm
D3=4.75mm
Type Range Linearity error (% F.S.) L X (nom) Total weight Spring force (nom) Over-Travel
Spring force at X Spring rate Inward over-travel Outward over-travel
LDC500A ±12.5mm <±0.5/±0.25/±0.1 182mm 38mm 227g 1.3N 0.2N/cm 1mm 13mm
LDC1000A ±25mm <±0.5/±0.25/±0.1 210mm 63mm 284g 2.0N 0.3N/cm 3mm 10mm
LDC2000A ±50mm <±0.5/±0.25/±0.1 324mm 75mm 398g 1.8N 0.2N/cm 8mm 14mm
LDC3000A ±75mm <±0.5/±0.25/±0.1 436mm 114mm 511g 6.0N 0.4N/cm 15mm 15mm

Specification

Excitation/supply (acceptable)5V to 18V dc, 60mA typical Output impedance 2 Ohms
Output±2.2V Temperature coefficient (span) ±0.03% F.S. /C (typical)
Output load2kOhms (minimum) Operating temperature range -40C to 70C
Output ripple30mV (peak-to-peak) Electrical termination 2m (integral cable) Longer available to order.
Electrical output bandwidth200Hz (flat)    


Connection details
LDC


Options and accessories

Rod-end bearings for captive-guided position transducers
Alternative probe tips for LVDTs
Mounting block


All dimensions and specifications are nominal. www.rdpe.com/ex/ldc.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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