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ACW Submersible LVDT Displacement Transducer


High accuracy
High cycle life
Stainless steel
Submersible
Infinite resolution
image of ACW Submersible 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 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
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 Sensitivity (nom)
ACW500 ±12.5mm (±0.5'') ±0.5/±0.25/±0.1 6.02'' 1.5'' 7.1oz 0.68oz 0.4'' 0.7V/V
ACW1000 ±25mm (±1'') ±0.5/±0.25/±0.1 7.13'' 2.5'' 9.1oz 0.90oz 0.9'' 0.9V/V
ACW2000 ±50mm (±2'') ±0.5/±0.25/±0.1 11.97'' 3.0'' 12.3oz 1.40oz 0.4'' 1.5V/V
ACW3000 ±75mm (±3'') ±0.5/±0.25/±0.1 16.54'' 4.5'' 1.1lb 2.00oz 0.9'' 1.5V/V
ACW4000 ±100mm (±4'') ±0.5/±0.25/±0.1 17.83'' 5.0'' 1.3lb 2.51oz 0.4'' 3.2V/V
ACW6000 ±150mm (±6'') ±0.5/±0.25 24.88'' 7.0'' 1.9lb 3.65oz 0.4'' 2.4V/V
ACW8000 ±200mm (±8'') ±0.5/±0.25 33.78'' 10.0'' 2.7lb 5.00oz 1.4'' 1.5V/V

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
A=0.81''
CL1=2.4''
D1=0.81''
D3=0.187''
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 Sensitivity (nom)
ACW500B ±12.5mm (±0.5'') ±0.5/±0.25/±0.1 6.02'' 1.5'' 11.1oz 0.4'' 1.1'' 0.7V/V
ACW1000B ±25mm (±1'') ±0.5/±0.25/±0.1 7.13'' 2.5'' 13.1oz 0.7'' 1.0'' 0.9V/V
ACW2000B ±50mm (±2'') ±0.5/±0.25/±0.1 11.97'' 3.0'' 1.2lb 0.4'' 1.1'' 1.5V/V
ACW3000B ±75mm (±3'') ±0.5/±0.25/±0.1 16.54'' 4.5'' 1.5lb 0.9'' 1.1'' 1.5V/V
ACW4000B ±100mm (±4'') ±0.5/±0.25/±0.1 17.83'' 5.0'' 1.6lb 0.4'' 1.1'' 3.2V/V
ACW6000B ±150mm (±6'') ±0.5/±0.25 24.88'' 7.0'' 2.3lb 0.4'' 1.4'' 2.4V/V
ACW8000B ±200mm (±8'') ±0.5/±0.25 33.78'' 10.0'' 3.2lb 1.4'' 1.6'' 1.5V/V
ACW10000B ±250mm (±10'') ±0.5/±0.25 41.06'' 12.0'' 3.6lb 1.4'' 1.9'' 2.0V/V
ACW15000B ±380mm (±15'') ±0.5 56.81'' 16.0'' 4.8lb 0.4'' 1.1'' 3.2V/V
ACW18500B ±470mm (±18.5'') ±0.5 67.56'' 20.0'' 5.6lb 0.9'' 1.4'' 3.6V/V

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.
dimensional drawing of LVDT spring return
CL1=2.4''
D1=0.81''
D3=0.187''
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 Sensitivity (nom)
ACW500A ±12.5mm (±0.5'') ±0.5/±0.25/±0.1 6.02'' 1.5'' 7.5oz 4oz 2oz/inch 0.2'' 1.1'' 0.7V/V
ACW1000A ±25mm (±1'') ±0.5/±0.25/±0.1 7.13'' 2.5'' 9.1oz 7oz 2oz/inch 0.2'' 1.0'' 0.9V/V
ACW2000A ±50mm (±2'') ±0.5/±0.25/±0.1 11.97'' 3.0'' 15.1oz 15oz 4oz/inch 0.2'' 1.1'' 1.5V/V
ACW3000A ±75mm (±3'') ±0.5/±0.25/±0.1 16.54'' 4.5'' 1.1lb 1lbs 3oz/inch 0.6'' 1'' 1.5V/V

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
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℉
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
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
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
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
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
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
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
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
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
*Transducer and cable option specifications should be compared and the worst figures used

Specification
Excitation/supply (acceptable) 0.5V to 7V rms, 2kHz to 10kHz (sinusoidal)
Excitation/supply (calibrated) 5V rms, 5kHz (sinusoidal)
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) ±0.006% F.S. /℉ (typical)
Operating temperature range -40℉ to 257℉*
Maximum static pressure 3000psi*

Options and accessories
TM0315 Operating temperature range (maximum) = 392℉  ( ±100mm (±4'') maximum ) image of High Temperature Survival
Rod-end bearings for captive-guided position transducers End bearings option thumbnail
Mounting block for RDP transducers mounting block thumbnail
E74 In-Line Signal Conditioning Amplifiers   ( Depending on cable type ) In-cable amplifer option thumbnail
Amplifiers Amplifier option thumbnail
Panel meter Panel meter option thumbnail