Force transducers: Piezoelectric sensors or strain gauge sensors?

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Apr 21

When it comes to force transducers, two principles of operation are most frequently used: those based on the use of piezoelectric sensors and those based on the capabilities of strain gauges. Which are the best? It is more appropriate to say that in certain situations and in specific contexts one type of sensor is more appropriate than the other. So let’s get to know them in more detail. This will help you to understand which is the best solution in your case.

The main features of piezoelectric sensors

Piezoelectric sensors, which are used for force transducers, generally consist of two discs with a foil electrode between them. When a certain force is applied to these devices, an electrical charge is immediately generated. This charge is measured by a charge amplifier. In other words, the charge generated is directly proportional to the force that is applied to the transducer, and the amplifier enables the force to be measured.

Force transducers with strain gauge sensors

A strain gauge sensor allows force to be measured in a different way. It always contains an element made of a strong, elastic material on which force is applied. This force clearly causes a slight deformation of the spring element, by which the applied force can be measured. Depending on the size of the spring element, the measuring range of the device can be determined.

Which sensor to choose?

In most cases, force transducers with piezoelectric sensors are the best choice if you are looking for an element that offers high stiffness. Consequently, they are even suitable for those who also want a high resonance frequency. Systems using a strain gauge sensor, on the other hand, have a relatively low resonance frequency.

In general, the choice of piezoelectric sensors is ideal for those who need to measure small forces quickly. Strain gauge operation is the best solution for those who need to measure large forces.

Support from professionals

Even those who have been using force transducers for a long time can benefit from the support of professionals. It is a good idea to get help from the companies that supply and, even better, manufacture these devices. Depending on the machinery, the working environment, the production methods, the specific needs and preferences, the experts can recommend the best sensor for the customer.

They can provide products suitable for even the harshest environments, such as IP68-rated force transducers and/or protective housings. Finally, professionals in the field can offer customised advice and a variety of solutions for those looking for high precision requirements as well as value for money.

Force transducers and sensors from AEP transducers

AEP transducers offers modern and efficient force transducers and sensors with the best metrological characteristics. Our laboratory is always working to ensure accurate, functional, robust and state-of-the-art products. We look forward to offering you customised solutions that are perfect for your working environment.