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TEST AND MEASUREMENT SENSORS AND SYSTEMS
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Linear Displacement Sensors

Linear Displacement Sensors

A linear displacement sensor is a device used to monitor and measure linear position.

They can also be called Linear Position Sensors or Linear Transducers. They are available in different sizes to measure different stroke lengths.

There are different types of linear displacement sensors which use different technologies. Different technologies will be suitable for different applications and environments.

What is a Linear Displacement Sensor?

Linear displacement sensors measure movement or position along a single axis. The linear displacement sensor is connected to an object, as the object moves the technology inside the sensor will measure the distance travelled and give an output.

Linear displacement sensors form part of a bigger device, the format of the output can be different based on the bigger device; potentiometric, DeviceNet, CanOpen, to name a few.

Selecting a Linear Displacement Sensor

When selecting a linear displacement sensor you should take the following into consideration;

Span of Measurement– roughly the length of the biggest movement involved in the application. Small movements will require a short stroke length, bigger movements a greater stroke length. This will also help determine the type of device, for example, very long movements will be more suited to a cable extension transducer than an LVDT or potentiometer.

Space – the amount of space allocated for the sensor itself within the device will have an impact on which type of linear displacement sensor is available. If space is tight then a small sensor with a good stroke to length ratio would be required.

Environment Conditions – will the linear displacement sensor be exposed to dust, dirt or moisture whilst in use? These environmental factors can impact performance so the sensor will require a protection rating.

Operating temperature– many sensors will have a max operating temperature before performance is compromised. Sometimes the surrounding area can have an increase in temperature. It is important to know the temperatures the sensor will be exposed to and use this information to make an informed decision about the sensor selected.

Types of Linear Displacement Sensor

Different types of linear displacement sensor have different advantages making them suitable for different applications. The uniqueness of a linear displacement sensor is determined by the technology used within.

Linear Potentiometer – a range from our sister company Variohm uses elastomer damped wipers in a cats claw configuration on a resistive track to give precise linear position measurement whilst minimising the effects of wear and tear. Potentiometers tend to be a cheaper option when it comes to linear displacement measurement.

Cable Extension Transducer – this type of linear displacement sensor can measure very large ranges. They are compact sensors using a flexible wire or cable to measure linear position.

Non-contacting Linear Displacement Sensors – there are many different types of non-contacting technologies. Some of the types we can offer are;

·         LVDT

·         Positek PIPS

·         Capacitive Sensors

·         Laser Position Sensors

·         Eddy Current – well suited to extreme environments

·         Ultrasonic

The main benefit of using non-contacting technologies is the extended life of the device – the contact-free element means there is no wear and tear allowing the sensors to give accurate measurements over a long period of time despite continuous use.

Linear Displacement Sensors from Ixthus

Linear displacement sensors are a big part of our product portfolio and we have been supplying them into many industries for years.

Browse our range of linear displacement sensors on ourwebsite.  If you would like further information or would like help selecting a sensor for your application please contact us.

For more information please contact: Ixthus Instrumentation Email: sales@ixthus.co.uk Tel:+44 (0) 1327  353437 Fax: +44 (0) 1327 353564

Article date: Mon, 03 Aug 2020 15:39:34 +0100 GMT

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