A Linear Variable Differential Transformer (LVDT) transducer is an electromechanical sensor used to measure linear displacement with exceptional accuracy. Its core design includes a primary coil, two secondary coils, and a movable ferromagnetic core. As the core moves, it alters the electromagnetic coupling between the coils, producing a differential AC output voltage that is directly proportional to the displacement.
Because of their robust design and non-contact operation, LVDT transducers are widely used in environments where precise, repeatable measurement is essential.
How LVDTs Work
When the primary coil is energised, the position of the core determines how the signal is induced in the secondary coils. This differential signal varies linearly with the core's position, enabling accurate and repeatable measurements without mechanical wear. The design ensures high immunity to electrical noise and mechanical degradation, making LVDTs suitable for long-term, high-precision applications.
Industrial Applications
LVDT transducers are used across many sectors, including:
- Manufacturing and quality control – for dimensional inspection and in-line gauging
- Aerospace – for flight control feedback and structural monitoring
- Automotive – for suspension testing, throttle control, and crash testing rigs
- Power generation and energy – for turbine valve position feedback and hydraulic monitoring
Wherever critical positioning or movement needs to be measured, LVDTs provide the reliability and consistency needed for dependable system performance.
Why Choose LVDTs?
LVDT transducers offer several advantages over alternative sensing methods:
- High resolution and repeatability, often down to microns or less
- Non-contact operation, meaning no physical wear and minimal maintenance
- Robust and reliable in harsh industrial conditions, including vibration, moisture, and temperature extremes
- Long operational life, even under continuous usage
At Monitran, we supply a comprehensive range of stainless steel LVDTs, tailored to different operational demands.
Our LVDT Series
Our LVDTs are built to withstand industrial use while delivering exceptional accuracy. Choose from:
Need Advice?
Whether you’re specifying for a new system or upgrading an existing one, our team can help you choose the most suitable LVDT transducer for your needs.
Get in touch with Monitran today to discuss your requirements.