High accuracy
High cycle life
Infinite resolution
Stainless steel
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.
This series of displacement transducer is available as either an unguided, captive or spring return version.
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.
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
Side (radial) exit cable.
A=9mm
D1=20.6mm
D3=4.75mm
D4=5.97mm
ID=6.8mm
TGF=M5x0.8
| Type | Range | Linearity error (% F.S.) | L | X (nom) | Total weight | Armature weight | TF | Inward over-travel | Sensitivity (nom) |
|---|---|---|---|---|---|---|---|---|---|
| ACT500 | ±12.5mm | ±0.5/±0.25/±0.1 | 127mm | 43mm | 170g | 17g | 15mm | 16mm | 0.7V/V |
| ACT1000 | ±25mm | ±0.5/±0.25/±0.1 | 155mm | 68mm | 227g | 23g | 15mm | 22mm | 0.9V/V |
| ACT2000 | ±50mm | ±0.5/±0.25/±0.1 | 270mm | 81mm | 320g | 37g | 15mm | 16mm | 1.5V/V |
| ACT3000 | ±75mm | ±0.5/±0.25/±0.1 | 380mm | 120mm | 454g | 55g | 15mm | 29mm | 1.5V/V |
| ACT4000 | ±100mm | ±0.5/±0.25/±0.1 | 427mm | 132mm | 568g | 71g | 15mm | 16mm | 3.2V/V |
| ACT6000 | ±150mm | ±0.5/±0.25 | 617mm | 183mm | 824g | 100g | 15mm | 16mm | 2.4V/V |
| ACT8000 | ±200mm | ±0.5/±0.25 | 808mm | 259mm | 1.2kg | 140g | 29mm | 27mm | 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.
Side (radial) exit cable.
A=24mm
D1=20.6mm
TGF=M5x0.8
TGR=M5x0.8
TR=11mm
| 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/±0.25/±0.1 | 152mm | 38mm | 4.75mm | 284g | 15mm | 10mm | 12mm | 0.7V/V |
| ACT1000C | ±25mm | ±0.5/±0.25/±0.1 | 180mm | 63mm | 4.75mm | 340g | 15mm | 13mm | 10mm | 0.9V/V |
| ACT2000C | ±50mm | ±0.5/±0.25/±0.1 | 295mm | 76mm | 4.75mm | 511g | 15mm | 10mm | 14mm | 1.5V/V |
| ACT3000C | ±75mm | ±0.5/±0.25/±0.1 | 406mm | 114mm | 4.75mm | 653g | 15mm | 24mm | 15mm | 1.5V/V |
| ACT4000C | ±100mm | ±0.5/±0.25/±0.1 | 452mm | 127mm | 4.75mm | 710g | 15mm | 8mm | 14mm | 3.2V/V |
| ACT6000C | ±150mm | ±0.5/±0.25 | 643mm | 178mm | 4.75mm | 1.0kg | 15mm | 12mm | 17mm | 2.4V/V |
| ACT8000C | ±200mm | ±0.5/±0.25 | 833mm | 254mm | 4.75mm | 1.4kg | 32mm | 22mm | 25mm | 1.5V/V |
| ACT10000C | ±250mm | ±0.5/±0.25 | 1030mm | 305mm | 4.75mm | 1.6kg | 27mm | 34mm | 35mm | 2.0V/V |
| ACT15000C | ±380mm | ±0.5 | 1435mm | 406mm | 4.75mm | 2.1kg | 19mm | 13mm | 13mm | 3.2V/V |
| ACT18500C | ±470mm | ±0.5 | 1702mm | 508mm | 6.00mm | 2.5kg | 27mm | 5mm | 33mm | 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.
Side (radial) exit cable.
A=9mm
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 | Sensitivity (nom) |
|---|---|---|---|---|---|---|---|---|---|---|
| ACT500A | ±12.5mm | ±0.5/±0.25/±0.1 | 133mm | 38mm | 184g | 1.3N | 0.2N/cm | 1mm | 13mm | 0.7V/V |
| ACT1000A | ±25mm | ±0.5/±0.25/±0.1 | 161mm | 63mm | 227g | 2.0N | 0.3N/cm | 3mm | 10mm | 0.9V/V |
| ACT2000A | ±50mm | ±0.5/±0.25/±0.1 | 276mm | 75mm | 398g | 1.8N | 0.2N/cm | 8mm | 14mm | 1.5V/V |
| ACT3000A | ±75mm | ±0.5/±0.25/±0.1 | 387mm | 114mm | 483g | 6.0N | 0.4N/cm | 15mm | 15mm | 1.5V/V |
Specification
| Excitation/supply (acceptable) | 0.5V to 7V rms, 2kHz to 10kHz (sinusoidal) |
|---|---|
| Excitation/supply (calibrated) | 5V rms, 5kHz (sinusoidal) |
| Output load | 100k 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) | ±0.01% F.S. /℃ (typical) |
| Operating temperature range | -50℃ to 125℃ |
| Electrical termination | 2m (integral cable) Longer available to order. |
Connection details
Options and accessories
| TM0315 Operating temperature range (maximum) = 200℃ ( ±100mm maximum ) |  |
| TM0256 Increased resistance to moisture |  |
| Rod-end bearings for captive-guided position transducers |  |
| Mounting block |  |
| E74 In-Line Signal Conditioning Amplifiers |  |
| Amplifiers |  |
| Panel meter |  |