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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.
Electrical supply options
DCWH Supply ±15V, Output ±5v
DCWV Supply 24V, Output 0-10V isolated
DCWL Supply 6-18Vdc, Output ±2.2V isolated
DCWC Supply 24V, 4-20mA 2 wire
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
DCWH100 to DCWH400
dimensional drawing of LVDT unguided
CL1=2.4''
D1=0.81''
D3=0.08''
D4=0.08''
ID=0.098''
TF=M3x0.5, 0.72''
X=Center of range
DCWH500 to DCWH8000
dimensional drawing of LVDT unguided
CL1=2.4''
D1=0.81''
D3=0.187''
D4=0.235''
ID=0.268''
TF=M5x0.8, 0.59''
X=Center of range
Type Range Linearity error (% F.S.) L X (nom) Total weight Armature weight Inward over-travel
DCWH100 ±2.5mm (±0.1'') ±0.5/±0.25 2.66'' 1.3'' 4.4oz 0.05oz 0.38''
DCWH200 ±5mm (±0.2'') ±0.5/±0.25 2.66'' 1.3'' 4.4oz 0.06oz 0.28''
DCWH300 ±7.5mm (±0.3'') ±0.5/±0.25 2.66'' 1.3'' 4.4oz 0.06oz 0.18''
DCWH400 ±10mm (±0.4'') ±0.5/±0.25 2.66'' 1.3'' 4.4oz 0.07oz 0.08''
DCWH500 ±12.5mm (±0.5'') ±0.5/±0.25/±0.1 7.99'' 1.5'' 8.6oz 0.68oz 0.4''
DCWH1000 ±25mm (±1'') ±0.5/±0.25/±0.1 9.09'' 2.5'' 10.6oz 0.90oz 0.9''
DCWH2000 ±50mm (±2'') ±0.5/±0.25/±0.1 13.94'' 3.0'' 14.1oz 1.40oz 0.4''
DCWH3000 ±75mm (±3'') ±0.5/±0.25/±0.1 18.50'' 4.5'' 1.2lb 2.00oz 0.9''
DCWH4000 ±100mm (±4'') ±0.5/±0.25/±0.1 19.80'' 5.0'' 1.4lb 2.51oz 0.4''
DCWH6000 ±150mm (±6'') ±0.5/±0.25 27.83'' 7.0'' 1.9lb 3.65oz 0.4''
DCWH8000 ±200mm (±8'') ±0.5/±0.25 35.79'' 10.0'' 2.8lb 5.00oz 1.4''

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.
DCWH500B to DCWH18500B
dimensional drawing of LVDT captive guided
CL1=2.4''
D1=0.81''
D3=0.19''
TF=M5x0.8, 0.59''
X=Center of range
Type Range Linearity error (% F.S.) L X (nom) Total weight Inward over-travel Outward over-travel
DCWH500B ±12.5mm (±0.5'') ±0.5/±0.25/±0.1 7.99'' 1.5'' 13oz 0.4'' 1.1''
DCWH1000B ±25mm (±1'') ±0.5/±0.25/±0.1 9.09'' 2.5'' 15.1oz 0.7'' 1.0''
DCWH2000B ±50mm (±2'') ±0.5/±0.25/±0.1 13.94'' 3.0'' 1.2lb 0.4'' 1.1''
DCWH3000B ±75mm (±3'') ±0.5/±0.25/±0.1 18.50'' 4.5'' 1.4lb 0.9'' 1.1''
DCWH4000B ±100mm (±4'') ±0.5/±0.25/±0.1 19.80'' 5.0'' 1.8lb 0.4'' 1.1''
DCWH6000B ±150mm (±6'') ±0.5/±0.25 27.83'' 7.0'' 2.3lb 0.4'' 1.4''
DCWH8000B ±200mm (±8'') ±0.5/±0.25 35.79'' 10.0'' 3.3lb 1.4'' 1.6''
DCWH10000B ±250mm (±10'') ±0.5/±0.25 43.07'' 12.0'' 3.8lb 1.4'' 1.9''
DCWH15000B ±380mm (±15'') ±0.5 58.78'' 16.0'' 5.0lb 0.4'' 1.1''
DCWH18500B ±470mm (±18.5'') ±0.5 69.53'' 20.0'' 5.8lb 0.9'' 1.4''

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.
DCWH100A to DCWH400A
dimensional drawing of LVDT spring return
CL1=2.4''
D1=0.81''
D2=0.31''
D3=0.16''
L2=1.40''
X=Center of range
DCWH500A to DCWH3000A
dimensional drawing of LVDT spring return
CL1=2.4''
D1=0.81''
D3=0.19''
X=Center of range
Type Range Linearity error (% F.S.) L X (nom) Total weight Spring force at X Spring rate Inward over-travel Outward over-travel
DCWH100A ±2.5mm (±0.1'') ±0.5/±0.25 2.66'' 0.5'' 4.8oz 3oz 9oz/inch 0.09'' 0.06''
DCWH200A ±5mm (±0.2'') ±0.5/±0.25 2.66'' 0.5'' 4.8oz 3oz 7oz/inch 0.01'' 0.06''
DCWH300A ±7.5mm (±0.3'') ±0.5/±0.25 2.66'' 0.7'' 4.8oz 5oz 6oz/inch 0.06'' 0.06''
DCWH400A ±10mm (±0.4'') ±0.5/±0.25 2.66'' 0.9'' 4.9oz 6oz 7oz/inch 0.06'' 0.06''
DCWH500A ±12.5mm (±0.5'') ±0.5/±0.25/±0.1 7.99'' 1.5'' 9.1oz 4oz 2oz/inch 0.2'' 1.1''
DCWH1000A ±25mm (±1'') ±0.5/±0.25/±0.1 9.09'' 2.5'' 11.1oz 7oz 2oz/inch 0.2'' 1.0''
DCWH2000A ±50mm (±2'') ±0.5/±0.25/±0.1 13.94'' 3.0'' 15.1oz 15oz 4oz/inch 0.2'' 1.1''
DCWH3000A ±75mm (±3'') ±0.5/±0.25/±0.1 18.50'' 4.5'' 1.2lb 1lbs 3oz/inch 0.6'' 1.1''

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 = 2.4''
Cable length = 16ft
Operating temperature range* = -13℉ to 194℉
Maximum static pressure* = 145psi
Connection details
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 = 0.8''
CL2 = 0.25''
CD1 = 0.5''
Operating temperature range* = -40℉ to 257℉
Connection details
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 = 1.0''
CL2 = 2.0''
CD1 = 1.0''
CBD (Cable bend datum) = 7.3''
Cable length = 23.6'' to 23ft
Operating temperature range* = -40℉ to 212℉
Maximum static pressure* = 500psi
Connection details
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 = 1.0''
CL2 = 2.0''
CD1 = 1''
CBD (Cable bend datum) = 3''
CSL = 24''
Cable length = 39.4'' to 328ft
Operating temperature range* = -40℉ to 194℉
Maximum static pressure* = 250psi
Connection details
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 = 0.2''
CD1 = 0.1''
D5 = 0.5''
Cable length = 3.9'' to 230ft
Operating temperature range* = -40℉ to 392℉
Maximum static pressure* = 3000psi
Connection details
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 = 2.5''
Cable length = 0'' to 3281ft
Operating temperature range* = -13℉ to 257℉
Maximum static pressure* = 116psi
Connection details
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 = 1.0''
TR = M5x0.8, 0.43''
CL1 = 2.5''
Cable length = 16ft
Operating temperature range* = -13℉ to 194℉
Maximum static pressure* = 145psi
Connection details
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 = 1.0''
TR = M5x0.8, 0.43''
CL1 = 1.2''
CL2 = 2''
CD1 = 1''
CBD = 7''
Cable length = 23.6'' to 23ft
Operating temperature range* = -40℉ to 212℉
Maximum static pressure* = 500psi
Connection details
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 = 1.0''
TR = M5x0.8, 0.43''
CL1 = 2.8''
Cable length = 0'' to 3281ft
Operating temperature range* = -13℉ to 257℉
Maximum static pressure* = 116psi
Connection details
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 = 1.0''
TR = M5x0.8, 0.43''
CL1 = 1.2''
CL2 = 2.2''
CD1 = 1''
CBD = 7''
CSL = 6''
Cable length = 23.6'' to 3281ft
Operating temperature range* = -40℉ to 194℉
Maximum static pressure* = 250psi
Connection details
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 = 1.0''
TR = M5x0.8, 0.43''
CL1 = 1.0''
CL2 = 2.0''
TC = 1/2''-14 NPT, 0.78''
CBD = 7.3''
CSL = 6''
Cable length = 39.4'' to 3281ft
Operating temperature range* = -40℉ to 194℉
Maximum static pressure* = 247psi
Connection details
*Transducer and cable option specifications should be compared and the worst figures used

Specification DCWH
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 ±5V (+0% - 5%)
Output ripple 30mV (peak-to-peak typical)
Analogue output bandwidth 200Hz
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) ±0.017% F.S. /℉ (typical)
Operating temperature range -40℉ to 176℉*
Maximum static pressure 3000psi*

Specification DCWC
Supply voltage (Vs) 12V to 36V
Max loop resistance (Supply voltage-11) x 50Ω
Output 4-20mA (4mA = inward full scale)
Output ripple 50uA (peak-to-peak)
Analogue output bandwidth 250Hz
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) ±0.017% F.S. /℉ (typical)
Operating temperature range 14℉ to 158℉*
Maximum static pressure 3000psi*

Specification DCWL
Supply voltage (Vs) 5V to 18V dc, 60mA typical
Output ±2.2V
Output ripple 30mV (peak-to-peak)
Analogue output bandwidth 200Hz (flat)
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) ±0.017% F.S. /℉ (typical)
Operating temperature range -40℉ to 158℉
Maximum static pressure 3000psi*

Specification DCWV
Supply voltage (Vs) 14V to 26V, 30mA
Output 0V to 10V (0 = inward full scale)
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) ±0.017% F.S. /℉ (typical)
Operating temperature range -40℉ to 158℉
Maximum static pressure 3000psi*