LVDT Displacement Transducer - AF111 | LVDT Sensors

LVDT Displacement Transducer - AF111 | LVDT Sensors

This LVDT displacement transducer is suitable for clamp mounting, and has a threaded, unguided core assembly to simplify installation.

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LVDT Displacement Transducer - AF111 | LVDT Sensors


  • Small transducer body length to stroke ratio
  • Temperature error less than 35ppm/°C
  • Welded stainless steel construction, sealed to IP66
  • Absolute measurement
  • Infinite resolution

For optimum performance, we recommend the use of the purpose designed signal conditioning modules to operate this LVDT sensors:-

  • UCM - Universal Conditioning Module, with IP68 protected metal enclosure.
  • SCM100 - DIN Rail mounting


The design of the AF111 LVDT displacement transducer has evolved from technology and experience gained in over 30 years in the bespoke aerospace / military sensor market, where performance and reliability under extreme operating conditions are paramount. The transducer coil has been specifically designed to reduce overall transducer length and to enable high accuracy ratiometric operation, as well as being able to operate in the "Differential Output" configuration.

Our high performance ratiometric LVDT transducer benefits from our extensive experience in fly-by-wire control systems for flight critical aerospace applications. Using high integrity coil, screen and connection assemblies, combined with welded and vacuum brazed stainless steel construction, these LVDTs can be supplied in a range of shaft and body configurations to suit clutch, gearbox, engine and brake applications.

The AF111 range of high accuracy LVDT displacement transducers have been designed primarily for use in the ratiometric configuration and have a compact size, with stroke lengths from 5mm to 150mm. Suitable for clamp mounting, the AF111 range has a threaded, unguided core assembly to simplify installation. Suited to numerous applications, such as vehicle research, and test rigs.


  • Input voltage and frequency: 1 to 10VRMS at 400Hz to 12.5kHz (sinewave)
  • Insulation resistance: Greater than 100MΩ at 500Vdc
  • Operational temperature °C: -35 to +125
  • Storage temperature °C: -55 to +135


  • Vehicle research
  • Test rigs
  • OEM machinery

RELATED PRODUCTS: AF145 - LVDT Displacement Transducer, In-cylinder Linear Displacement Sensor – ICS100, ICT800 - Contactless In-cylinder Linear Transducer – Analog Output, ICT820 - Contactless In-cylinder Linear Transducer – Can Sae J1939 Output, MLS130 - Linear Displacement Sensor, SLS095 - Linear Displacement Sensor, SLS130 - Linear Displacement Sensor, SLS190 - Linear Displacement Sensor, SLS220 - Linear Displacement Sensor, SLS320 - Linear Displacement Sensor, SLT190 - Contactless Linear Position Transducer  

LVDT Sensors: Purpose, Functionality & Application

An LVDT sensor is a type of electromechanical transformer used to convert motion into a variable electric current. More commonly known as a linear position displacement transducer, it effectively measures the voltage output related to the parameters in an application's specific usage.
An LVDT’s structure consists of a hollow metallic cylinder known as the coil assembly, which includes a core inside that moves back and forth alongside its axis. The coil assembly consists of three coils of wire wound on the hollow cylinder. Allowing the core to slide back and to through the center. The primary coil is power-supplied by an AC signal and two secondary coils. When the core is in motion, it introduces voltage into each secondary coil, dependent on its displacement inside. 
LVDTs are used in many applications, such as hydraulics, aircraft, nuclear reactors, power turbines, and many others.

Benefits of an LVDT Sensor

Robust nature 

LVDTs are built using material and construction techniques that result in a durable sensor. It's suitable for applications that must perform under the harshest of environments. They can operate over a high or low-temperature range, including exposure to radiation levels up to 100 Mrad. An LVDT can withstand high levels of moisture, humidity, shock loads, and even vibration levels. It's a highly robust solution for any applications in extreme environments. 

Friction-free & quick response

The contactless aspect of an LVDT’s operation allows the core position to respond very quickly. There is no dragging or source of friction on the sensor’s components, allowing for a virtually infinite long-life cycle. It's a desirable feature of the sensor for many applications that require high reliability, such as space vehicles, factory automation, and more

Infinite resolution & sensitivity

Due to its friction-free feature, an LVDT has the option to measure minimal changes to the core position. It can also respond even if the applications have misaligned or moving components, being sensitive to its core's cross-axis motion.

Individual coil & core

The best thing about the core and coil being separate is the non-magnetic barrier that allows the sensor to measure in pressurized environments. Its unique design allows for extreme reliability in a variety of applications. By inserting a non-magnetic barrier between the two, the core can be exposed to matter, while a barrier of glass or metal protects the coils.

Repeatability & output

In the event an application has lost power, an LVDT’s position data will not be compromised. On start-up, the measuring system will be in the same spot as it was before the power failure. Its repeatability is a consistent reference point for applications that need to perform in harsh environments. 

PDFs: CW-IG-OverviewBrochure_85.pdf ldvt-ind_brochure_2.pdf motorsport_brochure_2.pdf scm100_brochure_2.pdf ucm_brochure_2.pdf

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