Strain Gauge Displacement Sensor | Linear Position Sensor | AML/SGD

Highly Accurate, Long-Life, with a Low Power Consumption

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AML-SGD strain gauge displacement sensors

At a Glance

  • Stroke Ranges: 0-5mm to 0-100mm
  • mV/V Output
  • Environmental Protection: IP54
  • Spring Loaded
  • High Accuracy
  • Ideal for Battery-Powered Systems – Thanks to its low power consumption.
  • High Accuracy Guaranteed – With its strain gauge based measuring system.
  • Long Life – The AML/SGD will still work reliably and accurately even after 10 million cycles.
  • Let Us Do The Hard Work For You – We can supply the AML/SGD with a wide range of standard analogue and digital equipment.


Applied Measurements AML/SGD strain gauge displacement sensor utilises strain gauge technology to provide a linearly proportional voltage output in relation to the movement of a captivated spindle.

Available in ranges from 0-5mm up to 0-100mm, the strain gauge displacement transducer offers excellent accuracy of better than 0.1% on ranges up to 0-25mm and 0.2% on the 0-50mm and 0-100mm versions, coupled with high resolution and long-term stability.

The strain gauge bridge design operates using minimal current, making the AML/SGD suitable for use in battery-powered systems and equipment.

Common applications for Applied Measurements AML/SGD include Geotechnical Testing, R&D, Aerospace, Civil Engineering and Automotive.

Applied Measurements can supply a wide variety of instrumentation to complement your AML/SGD strain gauge displacement sensor, such as handheld indicators, digital displays and amplifiers.

Technical Specifications

Stroke Length:0-50-100-250-500-100millimetres
Spring Force:150-40050-30050-30050-250120-400gf (progressive)
Rated Output Lower/Upper Nominal Range:4.2/4.65.1/5.66.7/7.29.0/9.67.5mV/V (nominal)
Non-Linearity:<0.1<0.1<0.1<0.1<0.2±%/Rated Output (BFSL)
Hysteresis:<0.1<0.1<0.1<0.1<0.1±%/Rated Output
Repeatability:<0.05<0.05<0.05<0.05<0.05±%/Rated Output
Operating Temperature Range:-10 to +70°C
Temperature Effect On Output:<0.010±% of Rated Output/°C
Temperature Effect On Zero:<0.010±% of Rated Output/°C
Safe Overload:See note 4 below
Excitation:2 - 10Volts AC or DC
Current Consumption:<30 @ 10VdcmA
Input Resistance:350Ohms (nominal)
Output Resistance:350Ohms (nominal)
Insulation Resistance:>2000Megohms
Output Bandwidth:100Hz (nominal)
Construction:Stainless Steel/Aluminium
Environmental Protection:IP54
Cable:2m, 4 core Screened (min bend radius 10mm)
Weight (Excluding Cable) Nominal Range Lower/Upper:125/135130/140140/150180/200320grams
Operational Notes:
1. The outer case must not be distorted when clamping the sensor. A full diameter clamp is advised.
2. The sensor is not recommended for use in hostile environments without additional protection.
3. Special tools are required to remove the plunger tip (anvil) to avoid damage to the spindle.
4. With the plunger tip (anvil) attached this forms a positive overload protection stop.
If the anvil is removed, the threaded end of the plunger must not be allowed to enter the case.

Product Dimensions

AML/SGD Strain Gauge Displacement Sensor Outline Drawing
Stroke RangeABØC

Wiring Details

Red+ve excitation
Blue-ve excitation
Green+ve signal
Yellow-ve signal
ScreenTo ground - not connected to body

AML/SGD Displacement Sensor Mounting Clamps:

These clamps provide firm support for the LVDT sensors by securely gripping the entire diameter of the body of the sensor.

Accurate positioning of the LVDT sensors can be easily achieved as the mounting clamps allow for slight adjustments.

Single End Clamp Types:
SMC17 Mounting Clamp (0-5 to 0-50mm Ranges)
SMC25 Mounting Clamp (0-100mm Range Only)

Materials Clamp Bar Anodised Aluminium
Ring & Fixings Stainless Steel

Note: Clamp bar can be machined to suit applications.

AML/SGD Strain Gauge Displacement Sensor Mounting Clamps Diagram
TypeDIM ASensor Diameter
AML/SGD Strain Gauge Displacement Sensor Wing Nut Diagram

Double End Clamp Types:
DMC17 Double End Mounting Clamp (0-5 to 0-50mm Ranges)
DMC25 Double End Mounting Clamp (0-100mm Range Only)

Materials Clamp Bar Anodised Aluminium
Ring and Fixings Stainless Steel

AML/SGD Strain Gauge Displacement Sensor Double End Clamps Diagram
AML/SGD Strain Gauge Displacement Sensor Mounting Post Diagram

Ordering Codes & Options

AML/SGD-25mm-002-000 (example code)AML/SGD-25mm-002-000
Product Family
Stroke Range
Cable Length (in metres)
0.2 = 0.2 metres-0.2
002 = 2 metres-002
Specials Code
000 = Standard Product (as per datasheet)-000
AML/SGD-DMC17Double mounting clamp for AML/SGD 0-5mm to 0-50mm ranges
AML/SGD-DMC25Double mounting clamp for AML/SGD-100mm
AML/SGD-SMC17Mounting clamp for AML/SGD 0-5mm to 0-50mm ranges
AML/SGD-SMC25Mounting clamp for AML/SGD-100mm

Case Studies

Marmaray Tunnel Displacement Monitoring Inside Tunnel

Applied Measurements’ Displacement Transducers Make Tracks Through Turkey

Applied Measurements were asked to design a bespoke bridge monitoring system for Turkey’s new rail tunnel – The Marmaray Project. We created a bespoke bridge monitoring system using 3 off 50mm AML/SGD displacement transducers, forming a triaxial measurement of each joint. The AML/SGD series of displacement transducers utilise strain gauge technology to convert the linear movement of the joints within the tunnel into an analogue electrical signal. The AML/SGD series of displacement transducers were chosen for their excellent accuracy (0.1%), coupled with their high resolution and long-term stability, making them a perfect transducer for The Marmaray Project.