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image of D5/D6 LVDT Displacement Transducer D5 & D6 LVDT Displacement Transducer
image of GT Precision LVDT Gauging Transducer GT Precision LVDT Gauging Transducer
image of ACT LVDT Displacement Transducer ACT LVDT Displacement Transducer
image of DCV Series Isolated 0 to 10V Output Displacement Transducer DCV Series Isolated 0 to 10V Output Displacement Transducer
image of DCC Series 4-20mA 2-wire Output Displacement Transducer DCC Series 4-20mA 2-wire Output Displacement Transducer
image of D5W Submersible LVDT Displacement Transducer D5W Submersible LVDT Displacement Transducer
image of ACW Submersible LVDT Displacement Transducer SPECIFICATION - ACW Submersible LVDT Displacement Transducer
image of DCW Submersible DC to DC LVDT Displacement Transducer DCW Submersible DC to DC LVDT Displacement Transducer
image of SS Seawater Submersible LVDT Displacement Transducer SSA Seawater Submersible LVDT Displacement Transducer
image of SS Seawater Submersible LVDT Displacement Transducer SSD Seawater Submersible LVDT Displacement Transducer
image of LIN Extreme Environment Displacement Transducer LIN Extreme Environment Displacement Transducer
image of PY Extreme Environment Non-Contact Displacement Transducer PY Extreme Environment Non-Contact Displacement Transducer
image of LDC Internally Amplified LVDT Displacement Transducer LDC Internally Amplified LVDT Displacement Transducer
image of DCTH Internally Amplified LVDT Displacement Transducer DCTH Internally Amplified LVDT Displacement Transducer
What is an LVDT Displacement sensor?
LVDT stands for Linear Variable Differential Transformer. The moving part of the LVDT is connected to a core rod. Inside the body of the LVDT there is a primary coil (in the centre) and two secondary coils (at either end); the position of the core varies the induction into the two secondary coils. External or internal electronics then converts this signal into a dc output proportional to position of the core. Because 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 a cutting tool for example is essential for the control system. Our displacement transducers have visited the depths of the oceans for valve position measurement and been into space to measure the deflection in a mirror. They're also 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 comprises precision wound coils which are encased in stainless steel. Because the measurement principle uses a magnetic field there is no contact between the moving core (the part that makes the LVDT transducer output change) and the body of the LVDT so in the case of an unguided sensor there is absolutely no contact and therefore zero friction. Because of this our displacement transducers have been used in applications where they have been in service at the bottom of the sea 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. They might be measuring the elongation of a test sample as it is loaded or the position of a steam valve in a power station. Because of the way LVDT sensors work we can weld the electronics inside and allow the fluid to enter the tube inside the LVDT. This means that they can be used under water; deep under water. Some of our sea water submersible sensors can go down to 2.2km in sea water. By controlling the materials used both inside and outside the transducer we can also design sensors for high (600℃) and low (-220℃) temperature as well as very high nuclear radiation. We have been manufacturing LVDT displacement sensors for over 50 years and in that time we have developed a very wide range of standard products as well as very many specials.