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ACT LVDT Displacement Transducer


High accuracy
High cycle life
Infinite resolution
Stainless steel
image of ACT LVDT Displacement Transducer
The ACT series displacement transducers form part of our industrial series of LVDTs. Because they use the LVDT principle they have a very long life as there is no electrical contact across the sensing element which means clean, reliable data. The ACT transducer gives an output proportional to the position of the armature assembly with respect to the body of the transducer. ACT series transducers are available in three versions as detailed below.
RDP are the designers and manufactures of the ACT series and so in addition to the range of standard options (higher temperature, IP rating, radiation tolerance etc) we can offer tailor made mechanical solutions to mounting and installing the transducer.
Unguided version.
On our ACT 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. Our ACT unguided position measurement transducers are appropriate where external guidance is available and give truly non-contact operation
Side (radial) exit cable.
dimensional drawing of LVDT unguided
A=0.35''
D1=0.811'' ±0.005''
D3=0.187''
D4=0.235''
ID=0.268''
TGF=M5x0.8
X=Center of range
Type Range Linearity error (% F.S.) L X (nom) Total weight Armature weight TF Inward over-travel Sensitivity (nom)
ACT500 ±12.5mm (±0.5'') ±0.5/±0.25/±0.1 5.00'' 1.7'' 6.0oz 0.60oz 0.59'' 0.6'' 0.7V/V
ACT1000 ±25mm (±1'') ±0.5/±0.25/±0.1 6.10'' 2.7'' 8.0oz 0.81oz 0.59'' 0.9'' 0.9V/V
ACT2000 ±50mm (±2'') ±0.5/±0.25/±0.1 10.63'' 3.2'' 11.3oz 1.31oz 0.59'' 0.6'' 1.5V/V
ACT3000 ±75mm (±3'') ±0.5/±0.25/±0.1 14.96'' 4.7'' 1.0lb 1.94oz 0.59'' 1.1'' 1.5V/V
ACT4000 ±100mm (±4'') ±0.5/±0.25/±0.1 16.81'' 5.2'' 1.3lb 2.50oz 0.59'' 0.6'' 3.2V/V
ACT6000 ±150mm (±6'') ±0.5/±0.25 24.29'' 7.2'' 1.8lb 3.53oz 0.59'' 0.6'' 2.4V/V
ACT8000 ±200mm (±8'') ±0.5/±0.25 31.81'' 10.2'' 2.6lb 4.94oz 1.15'' 1.1'' 1.5V/V

Captive guided version.
Our ACT captive guided displacement transducer has bearings to guide the armature inside the measurement sensor. Our ACT 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=0.94''
D1=0.811'' ±0.005''
TGF=M5x0.8
TGR=M5x0.8
TR=0.43''
X=Center of range
Type Range Linearity error (% F.S.) L X (nom) D3 Total weight TF Inward over-travel Outward over-travel Sensitivity (nom)
ACT500C ±12.5mm (±0.5'') ±0.5/±0.25/±0.1 5.98'' 1.5'' 0.187'' 10.0oz 0.59'' 0.4'' 0.47'' 0.7V/V
ACT1000C ±25mm (±1'') ±0.5/±0.25/±0.1 7.09'' 2.5'' 0.187'' 12.0oz 0.59'' 0.5'' 0.39'' 0.9V/V
ACT2000C ±50mm (±2'') ±0.5/±0.25/±0.1 11.61'' 3.0'' 0.187'' 1.1lb 0.59'' 0.4'' 0.55'' 1.5V/V
ACT3000C ±75mm (±3'') ±0.5/±0.25/±0.1 15.98'' 4.5'' 0.187'' 1.4lb 0.59'' 0.9'' 0.59'' 1.5V/V
ACT4000C ±100mm (±4'') ±0.5/±0.25/±0.1 17.80'' 5.0'' 0.187'' 1.6lb 0.59'' 0.3'' 0.55'' 3.2V/V
ACT6000C ±150mm (±6'') ±0.5/±0.25 25.31'' 7.0'' 0.187'' 2.3lb 0.59'' 0.5'' 0.67'' 2.4V/V
ACT8000C ±200mm (±8'') ±0.5/±0.25 32.80'' 10.0'' 0.187'' 3.1lb 1.25'' 0.9'' 0.98'' 1.5V/V
ACT10000C ±250mm (±10'') ±0.5/±0.25 40.55'' 12.0'' 0.187'' 3.5lb 1.05'' 1.3'' 1.38'' 2.0V/V
ACT15000C ±380mm (±15'') ±0.5 56.50'' 16.0'' 0.187'' 4.7lb 0.75'' 0.5'' 0.51'' 3.2V/V
ACT18500C ±470mm (±18.5'') ±0.5 67.01'' 20.0'' 0.236'' 5.6lb 1.05'' 0.2'' 1.30'' 3.6V/V

Spring return version.
Our ACT 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. Our ACT spring return LVDTs are appropriate where it is not possible to connect the transducer armature to the moving component being measured.
Side (radial) exit cable.
dimensional drawing of LVDT spring return
A=0.35''
D1=0.811'' ±0.005''
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)
ACT500A ±12.5mm (±0.5'') ±0.5/±0.25/±0.1 5.25'' 1.5'' 6.5oz 5oz 2oz/inch 0.04'' 0.51'' 0.7V/V
ACT1000A ±25mm (±1'') ±0.5/±0.25/±0.1 6.35'' 2.5'' 8.0oz 7oz 3oz/inch 0.1'' 0.39'' 0.9V/V
ACT2000A ±50mm (±2'') ±0.5/±0.25/±0.1 10.85'' 3.0'' 14.0oz 6oz 2oz/inch 0.3'' 0.55'' 1.5V/V
ACT3000A ±75mm (±3'') ±0.5/±0.25/±0.1 15.25'' 4.5'' 1.1lb 1lbs 3oz/inch 0.6'' 0.59'' 1.5V/V

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 -58℉ to 257℉
Electrical termination 6.6ft (integral cable) Longer available to order.

Connection details
ACT

Options and accessories
TM0315 Operating temperature range (maximum) = 392℉  ( ±100mm (±4'') maximum ) image of High Temperature Survival
TM0256 Increased resistance to moisture image of Resistant to Moisture
Rod-end bearings for captive-guided position transducers End bearings option thumbnail
Mounting block for RDP transducers mounting block thumbnail
E74 In-Line LVDT Amplifier In-cable amplifer option thumbnail
Amplifiers Amplifier option thumbnail
Panel meter Panel meter option thumbnail