What is an LVDT sensor?

Tuesday, April 14, 2020

What is an LVDT sensor?

A linear variable differential transformer (LVDT) sensor is a commonly used metrology tool. Also known as a linear displacement transducer or a linear position transducer, it is considered one of the most robust and reliable precision-measurement sensors.
An LVDT sensor measures linear displacement (also referred to as linear position) to a very high degree of accuracy, generating measurement data that are critical to the product testing process and to product reliability and quality. As such, the use of high-quality LVDT sensor technology has clear business benefits.

The advantages of LVDT sensors

There are a number of factors that underpin the reputation and performance of LVDT sensors. Perhaps the main reason that this position sensor is one of the most widely used metrology tools is its high degree of robustness.
This displacement sensor technology owes its durability largely to the fact that there is no physical contact with the sensing element, which significantly reduces the wear and tear that the sensing element experiences.
The main advantages of LVDT sensors are as follows:

·       Low energy consumption: helping to increase cost-efficiency
·       High sensitivity: ensuring consistent, highly accurate measurement
·       Very robust: providing durability and a long lifespan
·       Good adaptability: allowing measurement where space and access are limited
·       Low hysteresis: ensuring optimal performance on a consistent basis
·       Excellent repeatability: providing highly accurate results time after time

LVDT sensor applications and who uses this sensor technology

LVDT sensors have two principal applications:
·    An LVDT sensor can be used to measure displacements, ranging from fractions of a millimetre to several centimetres
·    Acting as a secondary transducer, an LVDT sensor can be used to measure force, weight and pressure
As a result of these capabilities and thanks to its many benefits, this sensor technology is widely used across the industry spectrum, from the aerospace, automotive and pharmaceutical industries to the energy, electronics and environmental sectors.
For example, an LVDT sensor can be used to measure fluid levels, check bearing alignment, inspect assembly lines, test soil strength, check the height of SMC wafers and control pill production.

The LVDT sensor you need and your precision sensor partner

There are many LVDT sensor types. This means that you can choose the LVDT sensor technology best suited to your product properties, measurement environment and measurement needs. Types of LVDT sensor include:
·    A standard LVDT contact sensor
·    Low-tip force inductive LVDT sensor
·    Narrow body inductive LVDT sensor
·    Voltage output LVDT sensor
·    Specialist inductive LVDT sensor
Your precision sensor manufacturer should ensure that you have the right LVDT sensor at your disposal. The right partner will have the experience and expertise to guide you through the process and offer advice where appropriate. They should also provide a metrology solution customisation service, should you require it.
An LVDT sensor is a widely used and essential measurement tool and, as with other metrology solutions, it is critical that you have the right, high-quality linear transducer for your application. Your precision sensor manufacturer should ensure that you do.
Combining multiple sensors using the Orbit Digital Measurement network is easy and data can be read using a Solartron readout or the Gauge Computer Software making system integration simple.
To find out more about what Solartron Metrology can do for your business, contact us on +44 (0)1243 833333 or sales.solartronmetrology@ametek.com