At a Glance
- Stroke Ranges: ±0.25mm to ±50mm
- AC mV/V Output
- Environmental Protection: IP40
- Core-Only, Core + Extension &Spring-Loaded Versions
- Optional In-Line DC/DC Signal Conditioner
- Compact – Ideal for Material Testing Machines
- Wide Range of Mechanical Configurations to Suit Your Specific Application
- Fast and Simple Installation
- Compact In-Line Signal Conditioner Available if a DC Output is Required without Compromising on Space.
- Long Operating Life
- Wide Range of Instrumentation Available
Description
The AML/M series of miniature LVDT displacement transducers are available in ranges from ±0.25mm (0-0.5mm) up to ±50mm (0-100mm).
Available in either a 4-wire or 6-wire configurations, the miniature LVDT requires a sinusoidal AC supply voltage and provides an AC mV/V output signal which is linearly proportional to displacement.
A compact in-line DC in/DC out signal conditioner is available to complement the miniature LVDT and provide a 0-5Vdc, 0-10Vdc or 4-20mA output signal if required.
The miniature LVDT is available in one of 3 mechanical configurations; plain core-only, plain core & extension rod and spring loaded core and extension rod.
Their small size and variety of mechanical configurations make the AML/M miniature LVDT suitable for a broad range of applications such as material testing machines, production and development test rigs, quality assurance testing, automotive and aerospace actuators and within pressure sensors.
As with all of our LVDT displacement transducer range customisation to suit your application is possible so please contact us if you would like to discuss the possibilities in your particular application.
Technical Specifications
| CHARACTERISTICS | AML/M | AML/MJ | AML/MU | AML/MU10 | AML/MI | UNITS |
|---|---|---|---|---|---|---|
| Stroke Measurement Range: | ±0.5, ±1, ±2.5, ±5, ±10, ±12.5, ±15, ±25, ±50 | millimetres | ||||
| Signal Output: | See Table Below | 0-5volt | 0-10volt | 4-20mA | ||
| No. of Wires | 6 | 4 | 3 | 3 | 3 | |
| Supply Voltage (unregulated): | 2 to 5Vrms @ 1 to 5kHz | 10-24Vdc | 14-24Vdc | 14-24Vdc | ||
| Supply Current: | - | 35mA @ 15V | 35mA @ 15V | 35mA typ. | ||
| Max. Loop Resistance: | - | - | - | 300 @ 30V | ohms | |
| Max. Output Sink Current: | - | 0.5 | 1 | - | milliamps | |
| Non-Linearity: | <1.0 | ±% Stroke Range | ||||
| Repeatability: | <0.10 | ±% Stroke Range | ||||
| Output Bandwidth (flat): | 100 | Hz | ||||
| Output Ripple: | - | 30mV max. | 30mV max. | 0.1% @ 20mA | ||
| Operating Temperature Range: | AML/M & MJ: -30 to +85 Standard / -30 to +150 and -30 to +200 Optional 0 to +70 for in-line conditioner (where fitted). High temp versions NOT on sprung loaded. | °C | ||||
| Zero Temperature Coefficient: | <0.020 | <0.010 | ±%Stroke Range/°C | |||
| Span Temperature Coefficient: | <0.020 | <0.030 | ±%Stroke Range/°C | |||
| Vibration Resistance: | 20g up to 2kHz | |||||
| Shock Resistance: | 1000g for 10milliseconds | |||||
| Construction Materials: | Body & Extension Rod: 303 St/Steel, Core: 416 St/Steel, Cable Gland: Nickel-Plated Brass, Spring: 316 St/Steel | |||||
| Connecting Cable: | 2 metre screened PTFE cable. Axial or radial exit available - see order codes for full details. **Spring-loaded version ONLY available with radial cable exit. | |||||
| Environmental Sealing: | IP55 | |||||
| Note: On DC output version (0Vdc / 4mA) is given with the core in the extended / outwards position. This can be reversed if required, please request Option Y on your order. |
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| **The spring-loaded version is only available with a radial cable exit due to the rear extension of the LVDT. | ||||||
| Note: On versions with in-line signal conditioner zero output (0Vdc / 4mA) is given with the core in the extended / outwards position. This can be reversed if required, please request Option Y on your order. |
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Product Dimensions
| All | Standard (Plain) | All | |||||
|---|---|---|---|---|---|---|---|
| Stroke (mm) | Body Length (mm) | Core Length (mm) | Null Position (mm) | Sensitivity @ 3kHz with 50K Load (mV/V FRO) | Null | Primary Resistance (ohms) | Secondary Resistance (ohms) |
| ±0.25 | 25 | 10 | 10 | 32.5 | 3 | 50 | 100 |
| ±0.5 | 25 | 10 | 10 | 74 | 4 | 125 | 200 |
| ±1 | 32 | 15 | 14 | 150 | 7 | 73 | 365 |
| ±2.5 | 40 | 17 | 18 | 165 | 7 | 120 | 470 |
| ±5 | 55 | 25 | 25 | 280 | 10 | 180 | 710 |
| ±10 | 69 | 25 | 33 | 290 | 8 | 152 | 390 |
| ±12.5 | 84 | 27 | 40 | 285 | 7 | 190 | 510 |
| ±15 | 99 | 42 | 48 | 330 | 8 | 98 | 190 |
| ±25 | 150 | 55 | 70 | 220 | 6 | 145 | 200 |
| ±50 | 220 | 94 | 108 | 390 | 8 | 60 | 98 |
AML-M Miniature LVDT Displacement Transducer AC Version Plain 
AML-M-core extension
Plain Core AML-M Miniature AC Version Options: A = axial cable exit; R = radial cable exit; J = 4-wire device; H = high temperature 150°C; VH = very high temperature 200°C.
Core + Extension AML-M Miniature AC Version Options: A = axial cable exit; R = radial cable exit; J = 4-wire device; H = high temperature 150°C; VH = very high temperature 200°C.
| Stroke (mm) | Body Length (mm) | Sensitivity @ 3kHz with 50K Load (mV/V FRO) | Null (mV) | Primary Resistance (ohms) | Secondary Resistance (ohms) | Spring Rate (N/mm) |
|---|---|---|---|---|---|---|
| ±0.25 | 25 | 32.5 | 3 | 50 | 100 | 0.1090 |
| ±0.5 | 25 | 74 | 4 | 125 | 200 | 0.1090 |
| ±1 | 32 | 150 | 7 | 73 | 365 | 0.0908 |
| ±2.5 | 40 | 165 | 7 | 120 | 470 | 0.0778 |
| ±5 | 55 | 280 | 10 | 180 | 710 | 0.0605 |
| ±10 | 69 | 290 | 8 | 152 | 390 | 0.0363 |
| ±12.5 | 84 | 285 | 7 | 190 | 510 | 0.0303 |
| ±15 | 99 | 330 | 8 | 98 | 190 | 0.0259 |
| ±25 | 150 | 220 | 6 | 145 | 0200 | 0.0210 |
| ±50 | 220 | 390 | 8 | 60 | 98 | 0.0109 |
AML-M Miniature LVDT Displacement Transducer AC Version Sprung-Loaded (S) Outline
Sprung Loaded AML-M Miniature AC Version Options: R = radial cable exit; J = 4-wire device.
Note: No high-temperature options are available for spring loaded.
Wiring Details
AC Version 4-wire PTFE
| Wire | Designation |
|---|---|
| Red | Primary +ve |
| Yellow | Primary -ve |
| Blue | Secondary +ve |
| Green | Secondary -ve |
| Ground | Screen (not connected to sensor body) |
AC Version 6-Wire PTFE
| Wire | Designation |
|---|---|
| Yellow | Primary +ve |
| Black | Primary -ve |
| Green | Secondary 1 +ve |
| Red | Secondary 1 -ve (centre tap) |
| Brown | Secondary 2 +ve |
| Blue | Secondary 2 -ve (centre tap) |
| Ground | Screen (not connected to sensor body) |
DC Version 3-Wire (4-20mA, 0-5Vdc, 0-10Vdc)
| Wire | Designation |
|---|---|
| Red | Supply |
| Blue | 0V Common |
| Green | Signal |
| Ground | Screen (not connected to sensor body) |
Ordering Codes & Options
| AML/MJ+/-50mm-S0A-02-000 (example code) | AML/M | J | +/-50mm | - | S | O | A | - | 2 | - | 000 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Product Family | |||||||||||
| AML/M | AML/M | ||||||||||
| Electrical Output | |||||||||||
| Blank = 6-wire AC mV/V | Blank | ||||||||||
| J = 4-wire AC mV/V | J | ||||||||||
| U = 0-5Vdc * | U | ||||||||||
| U10 = 0-10Vdc * | U10 | ||||||||||
| I = 4-20mA * | I | ||||||||||
| * Provided by external amplifier mounted in-line on cable. | |||||||||||
| Stroke Range | |||||||||||
| +/-0.25mm (0-0.5mm) | +/-0.25mm | ||||||||||
| +/-0.5mm (0-1mm) | +/-0.5mm | ||||||||||
| +/-1mm (0-2.5mm) | +/-1mm | ||||||||||
| +/-2.5mm (0-5mm) | +/-2.5mm | ||||||||||
| +/-5mm (0-10mm) | +/-5mm | ||||||||||
| +/-12.5mm (0-25mm) | +/-12.5mm | ||||||||||
| +/-25mm (0-50mm) | +/-25mm | ||||||||||
| +/-50mm (0-100mm) | +/-50mm | ||||||||||
| Mechanical Configuration | |||||||||||
| C = Core Only | - | C | |||||||||
| X = Un-Guided Core & Extension Rod | - | X | |||||||||
| S = Spring Loaded Core & Extension Rod with Ball-Tip (±50mm / 0-100mm max range) | - | S | |||||||||
| H = 150ºC High Temperature Version (DC output only with in-line amplifier @ 70ºC max.) Core Only. | - | H | |||||||||
| HX = 150ºC High Temperature, with PTFE cable (AC output only) Unguided Core + Extension Rod | - | HX | |||||||||
| VH = 200ºC Very High Temperature Version (DC output only with in-line amplifier @ 70ºC max.) Core Only | - | VH | |||||||||
| VHX = 200ºC Very High Temperature, with PTFE cable (AC output only) Unguided Core + Extension Rod | - | VHX | |||||||||
| Output Direction (only affects DC output versions) | |||||||||||
| 0 = Zero with core extended, Full Scale with core retracted | 0 | ||||||||||
| Y = Full Scale with core extended, Zero with core retracted | Y | ||||||||||
| Cable Exit Direction | |||||||||||
| A = Axial (not available on spring loaded version) | A | ||||||||||
| R = Radial | R | ||||||||||
| Cable Length (in metres) | |||||||||||
| 02 = 2 metres (standard) | - | 2 | |||||||||
| 0,2 = 0.2 metres | - | 0,2 | |||||||||
| 10 = 10 metres | - | 10 | |||||||||
| Specials Code | |||||||||||
| 000 = No Special Requirements | - | 000 | |||||||||
| Sales To Provide Specials Codes As Required |
