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DCW Submersible DC to DC LVDT Displacement Transducer

High accuracy
High cycle life
Submersible
Stainless steel
High resolution
Voltage / 4-20mA output
image of DCW Submersible 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. As an option we can offer a 4-20mA 2 wire connection to the transducer on some models.
Our submersible displacement transducers are designed to make measurements whilst submerged in suitable liquids. Fluids which are non-magnetic can be allowed to flood the armature tube without affecting the operation of the transducer.
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
DCW100 to DCW400
dimensional drawing of LVDT unguided
CL1=62mm
D1=20.6mm
D3=2.0mm
D4=2.0mm
ID=2.50mm
TF=M3x0.5, 18mm
DCW500 to DCW8000
dimensional drawing of LVDT unguided
CL1=62mm
D1=20.6mm
D3=4.75mm
D4=5.97mm
ID=6.80mm
TF=M5x0.8, 15mm
Type Range Linearity error (% F.S.) L X (nom) Total weight Armature weight Inward over-travel
DCW100 ±2.5mm ±0.5/±0.25 68mm 33mm 125g 1.4g 9.6mm
DCW200 ±5mm ±0.5/±0.25 68mm 33mm 125g 1.8g 7.1mm
DCW300 ±7.5mm ±0.5/±0.25 68mm 33mm 125g 1.8g 4.6mm
DCW400 ±10mm ±0.5/±0.25 68mm 33mm 125g 1.9g 2.1mm
DCW500 ±12.5mm ±0.5/±0.25/±0.1 203mm 38mm 243g 19g 10mm
DCW1000 ±25mm ±0.5/±0.25/±0.1 231mm 63mm 300g 26g 23mm
DCW2000 ±50mm ±0.5/±0.25/±0.1 354mm 76mm 399g 40g 10mm
DCW3000 ±75mm ±0.5/±0.25/±0.1 470mm 114mm 527g 57g 23mm
DCW4000 ±100mm ±0.5/±0.25/±0.1 503mm 127mm 655g 71g 10mm
DCW6000 ±150mm ±0.5/±0.25 707mm 178mm 882g 104g 10mm
DCW8000 ±200mm ±0.5/±0.25 909mm 254mm 1.3kg 142g 36mm

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.
dimensional drawing of LVDT captive guided
CL1=62mm
D1=20.6mm
D3=4.75mm
TF=M5x0.8, 15mm
Type Range Linearity error (% F.S.) L X (nom) Total weight Inward over-travel Outward over-travel
DCW500B ±12.5mm ±0.5/±0.25/±0.1 203mm 38mm 370g 10mm 28mm
DCW1000B ±25mm ±0.5/±0.25/±0.1 231mm 63mm 428g 17mm 25mm
DCW2000B ±50mm ±0.5/±0.25/±0.1 354mm 76mm 541g 10mm 28mm
DCW3000B ±75mm ±0.5/±0.25/±0.1 470mm 114mm 655g 23mm 28mm
DCW4000B ±100mm ±0.5/±0.25/±0.1 503mm 127mm 797g 10mm 28mm
DCW6000B ±150mm ±0.5/±0.25 707mm 178mm 1.1kg 10mm 35mm
DCW8000B ±200mm ±0.5/±0.25 909mm 254mm 1.5kg 36mm 41mm
DCW10000B ±250mm ±0.5/±0.25 1094mm 305mm 1.7kg 36mm 47mm
DCW15000B ±380mm ±0.5 1493mm 406mm 2.2kg 10mm 28mm
DCW18500B ±470mm ±0.5 1766mm 508mm 2.6kg 23mm 35mm

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.
DCW100A to DCW400A
dimensional drawing of LVDT spring return
CL1=62mm
D1=20.6mm
D2=8.0mm
D3=4mm
L2=36mm
DCW500A to DCW3000A
dimensional drawing of LVDT spring return
CL1=62mm
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
DCW100A ±2.5mm ±0.5/±0.25 68mm 11mm 135g 0.9N 0.9N/cm 2.3mm 1.4mm
DCW200A ±5mm ±0.5/±0.25 68mm 13mm 136g 0.9N 0.8N/cm 0.3mm 1.4mm
DCW300A ±7.5mm ±0.5/±0.25 68mm 18mm 137g 1.3N 0.6N/cm 1.5mm 1.4mm
DCW400A ±10mm ±0.5/±0.25 68mm 22mm 138g 1.7N 0.8N/cm 1.5mm 1.4mm
DCW500A ±12.5mm ±0.5/±0.25/±0.1 203mm 38mm 257g 1.2N 0.2N/cm 6mm 28mm
DCW1000A ±25mm ±0.5/±0.25/±0.1 231mm 63mm 314g 1.9N 0.3N/cm 4mm 25mm
DCW2000A ±50mm ±0.5/±0.25/±0.1 354mm 76mm 428g 4.1N 0.4N/cm 6mm 28mm
DCW3000A ±75mm ±0.5/±0.25/±0.1 470mm 114mm 541g 5.4N 0.4N/cm 15mm 28mm

Electrical termination options
Standard cable - End exit connector with cable fitted
image of Standard cable - End exit connector with cable fitted
dimensional drawing of Standard cable - End exit connector with cable fitted
CL1 = 62mm
Cable length = 5m
Operating temperature range* = -25℃ to 90℃
Maximum static pressure* = 10bar
Option code 1 - End exit solder pins for customer to fit their own cable
image of Option code 1 - End exit solder pins for customer to fit their own cable
dimensional drawing of Option code 1 - End exit solder pins for customer to fit their own cable
CL1 = 21mm
CL2 = 6.4mm
CD1 = 12.7mm
Operating temperature range* = -40℃ to 125℃
Option code 2 - End exit fully sleeved integral cable
image of Option code 2 - End exit fully sleeved integral cable
dimensional drawing of Option code 2 - End exit fully sleeved integral cable
CL1 = 25mm
CL2 = 51mm
CD1 = 25mm
CBD (Cable bend datum) = 184mm
Cable length = 600mm to 7m
Operating temperature range* = -40℃ to 100℃
Maximum static pressure* = 34bar
Option code 3 - End exit part-sleeved integral cable
image of Option code 2 - End exit fully sleeved integral cable
dimensional drawing of Option code 3 - End exit part-sleeved integral cable
CL1 = 25mm
CL2 = 51mm
CD1 = 25mm
CBD (Cable bend datum) = 70mm
CSL = 600mm
Cable length = 1000mm to 100m
Operating temperature range* = -40℃ to 90℃
Maximum static pressure* = 17bar
Option code 5 - End exit integral MI (mineral insulated) stainless steel cable
image of Option code 5 - End exit integral MI (mineral insulated) stainless steel cable
dimensional drawing of Option code 5 - End exit integral MI (mineral insulated) stainless steel cable
CL1 = 4mm
CD1 = 3.0mm
D5 = 11.7mm
Cable length = 100mm to 70m
Operating temperature range* = -40℃ to 200℃
Maximum static pressure* = 207bar
Option code 6 - End exit connector with customer defined cable length fitted
image of Option code 6 - End exit connector with customer defined cable length fitted
dimensional drawing of Option code 6 - End exit connector with customer defined cable length fitted
CL1 = 64mm
Cable length = 0mm to 1000m
Operating temperature range* = -25℃ to 125℃
Maximum static pressure* = 8bar
Standard cable 7 - Side exit connector with cable fitted
image of Standard cable 7 - Side exit connector with cable fitted
dimensional drawing of Standard cable 7 - Side exit connector with cable fitted
CBX = 25mm
TR = M5x0.8, 11mm
CL1 = 64mm
Cable length = 5m
Operating temperature range* = -25℃ to 90℃
Maximum static pressure* = 10bar
Standard cable 8 - Side exit fully sleeved integral cable
image of Standard cable 8 - Side exit fully sleeved integral cable
dimensional drawing of Standard cable 8 - Side exit fully sleeved integral cable
CBX = 25mm
TR = M5x0.8, 11mm
CL1 = 30mm
CL2 = 55mm
CD1 = 25mm
CBD = 184mm
Cable length = 600mm to 7m
Operating temperature range* = -40℃ to 100℃
Maximum static pressure* = 34bar
Standard cable 9 - Side exit connector with customer defined cable length fitted
image of Standard cable 9 - Side exit connector with customer defined cable length fitted
dimensional drawing of Standard cable 9 - Side exit connector with customer defined cable length fitted
CBX = 25mm
TR = M5x0.8, 11mm
CL1 = 72mm
Cable length = 0mm to 1000m
Operating temperature range* = -25℃ to 125℃
Maximum static pressure* = 8bar
Standard cable 10 - Side exit part-sleeved integral cable
image of Standard cable 8 - Side exit fully sleeved integral cable
dimensional drawing of Standard cable 10 - Side exit part-sleeved integral cable
CBX = 25mm
TR = M5x0.8, 11mm
CL1 = 30mm
CL2 = 55mm
CD1 = 25mm
CBD = 184mm
CSL = 150mm
Cable length = 600mm to 1000m
Operating temperature range* = -40℃ to 90℃
Maximum static pressure* = 17bar
Standard cable 11 - Side exit part-sleeved integral cable and conduit fitting
image of Standard cable 11 - Side exit part-sleeved integral cable and conduit fitting
dimensional drawing of Standard cable 11 - Side exit part-sleeved integral cable and conduit fitting
CBX = 25mm
TR = M5x0.8, 11mm
CL1 = 25mm
CL2 = 50mm
TC = 1/2''-14 NPT, 20mm
CBD = 184mm
CSL = 150mm
Cable length = 1000mm to 1000m
Operating temperature range* = -40℃ to 90℃
Maximum static pressure* = 17bar
*Transducer and cable option specifications should be compared and the worst figures used
Specification Voltage Output (Standard)
Supply voltage (dual) ±12V to ±20V
Supply voltage (single, must be floating) 24V to 40V
Change in output for change in supply 5mV/V
Output ripple 30mV (peak-to-peak typical)
Analogue output bandwidth 200Hz
Operating temperature range -50℃ to 80℃*

Specification 4-20mA output (Optional)
Supply voltage (Vs) 12V to 36V
Max loop resistance (Supply voltage-11) x 50Ω
Output ripple 50uA (peak-to-peak)
Analogue output bandwidth 250Hz
Operating temperature range -10℃ to 70℃*

Specification Both Outputs
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)
Maximum static pressure 207bar*


WARNING - PERSONAL INJURY
Do not use these products as safety, emergency stop or feedback devices in any application where the failure of this product could result in damage to equipment, personal injury or death.
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.
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20190712