RDP basics

What is a converter?

A transducer (also commonly referred to as a sensor) is a device that converts a physical parameter into an electrical signal. There are many different types of sensors that measure many different physical parameters, but our offering focuses on displacement or position, load and pressure.

What is a displacement transducer?

A displacement transducer is a device that converts a length, movement or position into an electrical or digital signal. There are many different types, but due to the fact that the sensing element has no physical contact, ours are among the most reliable types available.

What is an LVDT displacement transducer?

LVDT stands for Linear Variable Differential Transformer (LVDT). The moving part of the LVDT is connected to a core rod. Inside the LVDT body there is a primary coil (in the middle) and two secondary coils (at both ends); the position of the core varies the induction in the two secondary coils. External or internal electronics then convert this signal into a DC output that is proportional to the position of the core. Since the core does not touch the coils, there is no contact so the output has infinite resolution.

Where are LVDT displacement transducers used?

LVDT displacement transducers are used in many different applications. The most common are in industrial production, where the need to know the position of e.g. a cutting tool is essential for the control system. Our transducers visited the depths of the oceans to measure the valve position and were in space to measure the deflection in a mirror. They are equally at home in your factory or laboratory!

How reliable are LVDT sensors?

LVDT displacement sensors are very reliable. The basic LVDT construction is very robust, as it consists of precisely wound coils that are coated with stainless steel. Since the measuring principle works with a magnetic field, there is no contact between the moving core (the part that changes the output signal of the LVDT transducer) and the body of the LVDT, so in the case of an unguided sensor there is absolutely no contact, and therefore none There is friction. For this reason, our displacement transducers have been used in applications in which they have been in use on the ocean floor for decades.

In which environments can LVDT displacement sensors be used?

That depends on the type! Our standard industrial series displacement sensors are designed for factories, laboratories and research departments. For example, you can measure the elongation of a test object under load or the position of a steam valve in a power plant. Due to the way LVDT sensors work, we can weld the electronics inside and let the liquid penetrate the tube inside the LVDT. This means that they can be used underwater; deep under water. Some of our seawater immersion sensors can immerse up to 2.2 km in seawater. By controlling the materials used both inside and outside the transducer, we can also design sensors for high (600 ℃) and low (-220 ℃) ​​temperatures, as well as very high levels of nuclear radiation.We have been manufacturing LVDT displacement sensors for over 50 years and have developed a very wide range of standard products as well as many special products during this time