ACW Submersible LVDT Displacement Transducer

High accuracy
High cycle life
Stainless steel
Submersible
Infinite resolution



RDP LVDT How it Works

   Data sheet (524kb)
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.

LVDT transducers require external signal conditioning as detailed in the 'Electronics' section of this website.

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

Shown with standard cable assembly, see below for options
D1 = 0.81''
D3 = 0.187''
D4 = 0.235''
ID = 0.268''
CL1 = 2.4''
TF = M5x0.8, 0.59''
Type Range Linearity error (% F.S.) L X (nom) Total weight Armature weight Over-Travel Sensitivity (nom)
Inward over-travel
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.

Shown with standard cable assembly, see below for options
D1 = 0.81''
D3 = 0.187''
CL1 = 2.4''
TF = M5x0.8, 0.59''
Type Range Linearity error (% F.S.) L X (nom) Total weight Over-Travel Sensitivity (nom)
Inward over-travel Outward over-travel
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.

Shown with standard cable assembly, see below for options
D1 = 0.81''
D3 = 0.187''
CL1 = 2.4''
Type Range Linearity error (% F.S.) L X (nom) Total weight Spring force (nom) Over-Travel Sensitivity (nom)
Spring force at X Spring rate Inward over-travel Outward over-travel
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

* 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) Operating temperature range (minimum) -40F
Excitation/supply (calibrated)5V rms, 5kHz (sinusoidal) Operating temperature range (maximum) 257F
Output load100k Ohms Maximum static pressure 3000psi
Temperature coefficient (span)±0.006% F.S. /F (typical)    


Electrical termination options * Transducer and cable option specifications should be compared and the worst figures used

Standard cable - End exit connector with cable fitted
CL1 = 2.4''
Cable length = 16ft
Operating temperature range* = -13F to 194F
Maximum static pressure* = 145psi
Connection details

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* = -40F to 257F
Connection details

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* = -40F to 212F
Maximum static pressure* = 500psi
Connection details

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* = -40F to 194F
Maximum static pressure* = 250psi
Connection details

Option code 5 - End exit integral MI (mineral insulated) stainless steel cable
CL1 = 0.2''
CD1 = 0.1''
Cable length = 3.9'' to 230ft
Operating temperature range* = -40F to 392F
Maximum static pressure* = 3000psi
D5 = 0.5''
Connection details

Option code 6 - End exit connector with customer defined cable length fitted
CL1 = 2.5''
Cable length = 0'' to 3281ft
Operating temperature range* = -13F to 257F
Maximum static pressure* = 116psi
Connection details

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* = -13F to 194F
Maximum static pressure* = 145psi
Connection details

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 (Cable bend datum) = 7''
Cable length = 23.6'' to 23ft
Operating temperature range* = -40F to 212F
Maximum static pressure* = 500psi
Connection details

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* = -13F to 257F
Maximum static pressure* = 116psi
Connection details

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 (Cable bend datum) = 7''
CSL = 6''
Cable length = 23.6'' to 3281ft
Operating temperature range* = -40F to 194F
Maximum static pressure* = 250psi
Connection details

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 (Cable bend datum) = 7.3''
CSL = 6''
Cable length = 39.4'' to 3281ft
Operating temperature range* = -40F to 194F
Maximum static pressure* = 247psi
Connection details


Options and accessories

TM0315 Operating temperature range (maximum) = 392F  ( ±100mm (±4'') maximum )
Rod-end bearings for captive-guided position transducers
Alternative probe tips for LVDTs
Mounting block
E74 In-Line Signal Conditioning Amplifiers   ( Depending on cable type )
Electronics


All dimensions and specifications are nominal. www.rdpe.com/us/acw.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.
 

RDP Electrosense
2216 Pottstown Pike
Pottstown, PA 19465
USA
Tel: 610-469-0850
Tel: 800-334-5838
Fax: 610-469-0852
Email: info@rdpe.com

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