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DCTH Series DC to DC LVDT Displacement Transducer

Voltage output
High accuracy
High cycle life
Stainless steel
High resolution
image of DCTH Series DC to DC LVDT Displacement Transducer
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
DCTH100 to DCTH400
End (axial) exit cable.
dimensional drawing of LVDT unguided
D1=20.6mm
D3=2mm
D4=2.0mm
ID=2.54mm
TGF=M3x0.5
DCTH500 to DCTH8000
Side (radial) exit cable.
dimensional drawing of LVDT unguided
A=9mm
D1=20.6mm
D3=4.75mm
D4=5.97mm
ID=6.8mm
TGF=M5x0.8
Type Range Linearity error (% F.S.) L X (nom) Total weight Armature weight TF Inward over-travel
DCTH100 ±2.5mm ±0.5 or ±0.25 or ±0.1 64mm 33mm 74g 1.4g 18mm 11.6mm
DCTH200 ±5mm ±0.5 or ±0.25 or ±0.1 64mm 33mm 74g 1.8g 18mm 9.0mm
DCTH300 ±7.5mm ±0.5 or ±0.25 or ±0.1 64mm 33mm 74g 1.8g 18mm 6.5mm
DCTH400 ±10mm ±0.5 or ±0.25 64mm 33mm 74g 1.9g 18mm 3.9mm
DCTH500 ±12.5mm ±0.5 or ±0.25 or ±0.1 175mm 43mm 213g 17g 15mm 16mm
DCTH1000 ±25mm ±0.5 or ±0.25 or ±0.1 203mm 69mm 270g 23g 15mm 22mm
DCTH2000 ±50mm ±0.5 or ±0.25 or ±0.1 317mm 81mm 369g 37g 15mm 16mm
DCTH3000 ±75mm ±0.5 or ±0.25 or ±0.1 430mm 119mm 497g 55g 15mm 29mm
DCTH4000 ±100mm ±0.5 or ±0.25 or ±0.1 475mm 132mm 625g 71g 15mm 16mm
DCTH6000 ±150mm ±0.5 or ±0.25 666mm 183mm 852g 100g 15mm 16mm
DCTH8000 ±200mm ±0.5 or ±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.
Side (radial) exit cable.
dimensional drawing of LVDT captive guided
A=23mm
D1=20.6mm
TGF=M5x0.8
TR=M5x0.8 / 11mm
Type Range Linearity error (% F.S.) L X (nom) D3 Total weight TF Inward over-travel Outward over-travel
DCTH500C ±12.5mm ±0.5 or ±0.25 or ±0.1 194mm 38mm 4.75mm 340g 15mm 10mm 12mm
DCTH1000C ±25mm ±0.5 or ±0.25 or ±0.1 222mm 63mm 4.75mm 398g 15mm 13mm 10mm
DCTH2000C ±50mm ±0.5 or ±0.25 or ±0.1 336mm 76mm 4.75mm 511g 15mm 10mm 14mm
DCTH3000C ±75mm ±0.5 or ±0.25 or ±0.1 448mm 114mm 4.75mm 625g 15mm 24mm 15mm
DCTH4000C ±100mm ±0.5 or ±0.25 or ±0.1 494mm 127mm 4.75mm 767g 15mm 8mm 14mm
DCTH6000C ±150mm ±0.5 or ±0.25 684mm 178mm 4.75mm 1.0kg 15mm 12mm 17mm
DCTH8000C ±200mm ±0.5 or ±0.25 875mm 254mm 4.75mm 1.4kg 32mm 22mm 25mm
DCTH10000C ±250mm ±0.5 or ±0.25 1067mm 305mm 4.75mm 1.7kg 27mm 34mm 35mm
DCTH15000C ±380mm ±0.5 1473mm 406mm 4.75mm 2.2kg 19mm 13mm 13mm
DCTH18500C ±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.
DCTH100AG to DCTH400AG
End (axial) exit cable.
dimensional drawing of LVDT spring return
D1=20.6mm
D2=8.0mm
D3=4.0mm
L2=36mm
DCTH500A to DCTH3000A
Side (radial) exit cable.
dimensional drawing of LVDT spring return
A=9mm
D1=20.6mm
D3=4.75mm
Type Range Linearity error (% F.S.) L X (nom) Total weight Spring force at X Spring rate Inward over-travel Outward over-travel
DCTH100AG ±2.5mm ±0.5 or ±0.25 or ±0.1 64mm 12mm 83g 1.0N 0.9N/cm 2.2mm 1.3mm
DCTH200AG ±5mm ±0.5 or ±0.25 or ±0.1 64mm 13mm 83g 1.0N 0.8N/cm 0.3mm 1.3mm
DCTH300AG ±7.5mm ±0.5 or ±0.25 or ±0.1 64mm 18mm 83g 1.5N 0.6N/cm 1.4mm 1.3mm
DCTH400AG ±10mm ±0.5 or ±0.25 64mm 22mm 83g 1.8N 0.8N/cm 1.3mm 1.3mm
DCTH500A ±12.5mm ±0.5 or ±0.25 or ±0.1 182mm 38mm 227g 1.3N 0.2N/cm 1.0mm 13mm
DCTH1000A ±25mm ±0.5 or ±0.25 or ±0.1 210mm 63mm 284g 2.0N 0.3N/cm 3.0mm 10mm
DCTH2000A ±50mm ±0.5 or ±0.25 or ±0.1 324mm 75mm 398g 1.8N 0.2N/cm 8mm 14mm
DCTH3000A ±75mm ±0.5 or ±0.25 or ±0.1 436mm 114mm 511g 6.0N 0.4N/cm 15mm 15mm

Specification
Supply voltage (dual) ±12V to ±20V 30mA
Supply voltage (single, must be floating) 24V to 40V 30mA
Change in output for change in supply 5mV/V
Output 1 0V to 10V (+0% - 5%)
Output 2 ±5V (+0% - 5%)
Output load 10kΩ
Output ripple 30mV (peak-to-peak)
Analogue output bandwidth 200Hz
Output impedance 2 Ω
Linearity error (Standard) ±0.5% F.S.
Linearity error (Optional on some models) ±0.25% F.S.
Linearity error (Optional on some models) ±0.1% F.S.
Temperature coefficient (span) ±0.03% F.S. /℃ (typical)
Operating temperature range -40℃ to 80℃
Electrical termination 2m (integral cable) Longer available to order.

Connection details

Options and accessories

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. All dimensions and specifications are nominal.
https://www.rdpe.com/uk/dcth.htm
20190328