DCC Series 4-20mA 2-wire Output Displacement Transducer

4-20mA 2 wire interface
Stainless steel
High accuracy
High cycle life
High resolution
Electrical interface for industrial applcations

How it Works - 4 to 20mA LVDT
   Data sheet (463kb)
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 4-20mA LVDT transducer has all of the benefits of the LVDT sensor principle with the added convenience of a 2-wire interface..

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
DCTH100/1431 to DCTH400/1431
DCC025U to DCC0400U
Type Range Linearity error (% F.S.) L X (nom) Total weight Armature weight TF Over-Travel
Inward over-travel
DCTH100/1431 5mm <±0.5/±0.25/±0.1 83mm 34mm 207g 3g 18mm 11.6mm
DCTH200/1431 10mm <±0.5/±0.25/±0.1 83mm 34mm 207g 3g 18mm 9.0mm
DCTH300/1431 15mm <±0.5/±0.25/±0.1 83mm 34mm 207g 3g 18mm 6.5mm
DCTH400/1431 20mm <±0.5/±0.25 83mm 34mm 207g 3g 18mm 3.9mm
DCC025U 25mm <±0.5/±0.25/±0.1 175mm 43mm 213g 17g 15mm 16mm
DCC050U 50mm <±0.5/±0.25/±0.1 203mm 69mm 270g 23g 15mm 22mm
DCC100U 100mm <±0.5/±0.25/±0.1 317mm 81mm 369g 37g 15mm 16mm
DCC150U 150mm <±0.5/±0.25/±0.1 430mm 119mm 497g 55g 15mm 29mm
DCC200U 200mm <±0.5/±0.25/±0.1 475mm 132mm 625g 71g 15mm 16mm
DCC300U 300mm <±0.5/±0.25 666mm 183mm 852g 100g 15mm 16mm
DCC400U 400mm <±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
DCC025C 25mm <±0.5/±0.25/±0.1 194mm 38mm 4.75mm 340g 15mm 10mm 12mm
DCC050C 50mm <±0.5/±0.25/±0.1 222mm 63mm 4.75mm 398g 15mm 13mm 10mm
DCC100C 100mm <±0.5/±0.25/±0.1 336mm 76mm 4.75mm 511g 15mm 10mm 14mm
DCC150C 150mm <±0.5/±0.25/±0.1 448mm 114mm 4.75mm 625g 15mm 24mm 15mm
DCC200C 200mm <±0.5/±0.25/±0.1 494mm 127mm 4.75mm 767g 15mm 8mm 14mm
DCC300C 300mm <±0.5/±0.25 684mm 178mm 4.75mm 1.0kg 15mm 12mm 17mm
DCC400C 400mm <±0.5/±0.25 875mm 254mm 4.75mm 1.4kg 32mm 22mm 25mm
DCC500C 500mm <±0.5/±0.25 1067mm 305mm 4.75mm 1.7kg 27mm 34mm 35mm
DCC760C 760mm <±0.5 1473mm 406mm 4.75mm 2.2kg 19mm 13mm 13mm
DCC940C 940mm <±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.
DCTH100AG/1431 to DCTH400AG/1431
DCC025A to DCC150A
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
DCTH100AG/1431 5mm <±0.5/±0.25/±0.1 83mm 12mm 220g 1.0N 0.9N/cm 2.2mm 1.3mm
DCTH200AG/1431 10mm <±0.5/±0.25/±0.1 83mm 13mm 220g 1.0N 0.8N/cm 0.3mm 1.3mm
DCTH300AG/1431 15mm <±0.5/±0.25/±0.1 83mm 18mm 220g 1.5N 0.6N/cm 1.4mm 1.3mm
DCTH400AG/1431 20mm <±0.5/±0.25 83mm 22mm 220g 1.8N 0.8N/cm 1.3mm 1.3mm
DCC025A 25mm <±0.5/±0.25/±0.1 182mm 38mm 227g 1.3N 0.2N/cm 1.0mm 13mm
DCC050A 50mm <±0.5/±0.25/±0.1 210mm 63mm 284g 2.0N 0.3N/cm 3.0mm 10mm
DCC100A 100mm <±0.5/±0.25/±0.1 324mm 75mm 398g 1.8N 0.2N/cm 8mm 14mm
DCC150A 150mm <±0.5/±0.25/±0.1 436mm 114mm 511g 6.0N 0.4N/cm 15mm 15mm

Connection details


Excitation/supply (acceptable)12V to 36V Electrical output bandwidth 250Hz
Output4-20mA (4mA = inward full scale) Temperature coefficient (span) ±0.03% F.S. /C (typical)
Output load(Vs-11) x 50 .Ohms Operating temperature range -10C to 70C
Output ripple50uA (peak-to-peak) Electrical termination 2m (integral cable) Longer available to order.

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/dcc.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
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