Measuring position and displacement with LVDTs

Wednesday, September 16, 2020

A linear variable differential transformer, or LVDT, is a common metrology tool that plays an intrinsic role in manufacturing processes across the industry spectrum.
The designs and properties of LVDTs, which are also referred to as linear variable displacement transformers and linear variable displacement transducers, allow them to measure position and displacement to a very high degree of accuracy.
This is important to manufacturing processes because the precision-measurement data generated by LVDTs help to ensure the robustness of product testing and the reliability and quality of components and parts.

The business benefits of LVDT sensors

LVDT sensors offer manufacturers a range of benefits that help improve production processes and product standards. These include:

·    Durability. LVDTs are non-contacting tools and friction is minimal. This means that the technology is very long lasting with only minimal maintenance costs.
·    Speed. These displacement sensors are fast working and take measurements rapidly. This helps to make manufacturing processes quicker and more efficient.
·    Robustness. LVDT sensors are robust and hard wearing. As a result, they can function to a very high standard in a range of harsh environments.
·    Accuracy. These displacement transducers can measure the smallest changes in position. As such, they guarantee high accuracy and excellent repeatability.
·    Flexibility. LVDT sensors can be easily modified to meet the needs of specific components and parts and individual testing and manufacturing processes.
·    Economy. LVDTs are low-power consumption tools. This has a direct impact on manufacturing process costs and helps achieve responsible power-use targets.


The role and importance of LVDT sensors

The capabilities of LVDTs and the measurement data that they generate mean that they are used across the industry spectrum. The guarantee of superior accuracy and repeatability is critical to manufacturers competing in increasingly competitive and regulated markets around the world.
For example, in the automotive industry, LVDT sensors are used to measure power and transmission components, including crankshafts, camshafts, chassis and cylinder heads, and security devices and glass parts.
In the environmental sector, displacement transducers are used to better understand irrigation processes and their influences, while in the electronics industry, the sensors ensure the precision measurement of increasingly intricate electronic components.


How specific measurement needs are met using LVDTs

Manufacturing processes and their requirements vary significantly from industry to industry, and even within industries. There are a wide range of LVDT sensor types to meet the varied demands relating to product properties and measurement environments and needs.
Types of LVDTs include standard digital displacement sensor and gauge probes, low-tip force inductive LVDT sensors, narrow body inductive LVDT sensors, voltage output LVDT sensors and specialist inductive LVDT sensors.
Furthermore, it is straightforward to adapt these displacement sensors to specific component and part measurement needs.


How to ensure you are using the right LVDT sensors

LVDTs are highly important tools: the sensors that you use have a direct impact on the efficiency and quality of your manufacturing process and end products. As such, it is critical that you work with the right precision sensor manufacturer.
Your LVDT sensor partner should make sure that you are using the right sensor technology for your processes and products. They should have the experience and expertise to assess your needs, advise on your choices and supply you with the right metrology solutions.

To find out more about what Solartron Metrology can do for your business, contact us on +44 (0)1243 833333 or