Leading Manufacturer of LVDT Sensors

Specializing in Linear Variable Differential Transformers (LVDT) and Velocity Transducers

Trans-Tek, Inc. is a leading LVDT manufacturer that has been providing the very best Linear and Angular Displacement and Linear Velocity Transducers for over half a century. Our main focus is LVDT (Linear Variable Differential Transformer) technology for linear sensing.

When it comes to solving your measurement challenges, our experienced engineers will find the right LVDT position or velocity sensor to meet your most demanding requirements. Our complete production facility is geared to meet your delivery needs – whether it’s for a standard or custom sensor solution. Our LVDT Research & Development (R&D) program is continuously expanding our product line to address countless industrial applications.

Transtek is committed to manufacturing LVDT sensors that combine precision, durability, and reliability. With a global network of technical representatives and a dedicated team, Trans-Tek ensures that every client receives top-tier service and support. Our mission is to provide competitively priced LVDT products that exceed your expectations in both performance and delivery.

We proudly hold two key industry certifications: the ISO 9000 certification for quality management and the AS9100 quality certification for the aerospace industry. READ MORE

Our LVDT types include:

> AC-AC LVDTs

> DC-DC LVDTs

> Gaging LVDTs

> Click here to see our full lineup of LVDTs and Angular Displacement and Linear Velocity Solutions

What is An LVDT?

LVDT, or linear variable differential transformer, is a type of electrical transformer used to measure linear displacement (or position). They are also known as an LVDT sensors.

An LVDT consists of a primary coil, a movable core, and two secondary coils. The primary coil is connected to an alternating current (AC) power source, and the secondary coils are connected to a measurement device such as a bridge circuit. 

As the core moves in or out of the transformer, the relative inductance between the primary coil and each secondary coil changes, causing a change in the output voltage of the secondary coils. This change in voltage can be used to determine the displacement of the core. 

LVDTs are commonly used in industrial applications such as measuring the position of valves, pistons, and other mechanical components just name a few. They are highly accurate and have a wide measurement range.

In Simple Terms, an LVDT is a Measurement Device

An LVDT sensor is a measurement device. It is used to measure linear displacement (or position) of an object. It converts the small linear movement of an object into a proportional electrical signal, which can then be read and interpreted by electronic measurement equipment. The electrical signal produced by an LVDT is directly proportional to the displacement of the core, and can be used to determine the position of the object with high accuracy.

What Does an LVDT Measure?

An LVDT can be used to measure the linear displacement of a wide range of objects, across many different industries. Here are some examples:

Machine Tooling –  LVDTs are commonly used in machine tools to measure the position of slides, tables, and other moving parts.

Industrial Process Control – LVDTs are used in process control systems to measure the position of valves, pumps, and other equipment.

Aerospace – LVDTs are used to measure the displacement of various components in aerospace applications such as aircraft flap and landing gear position.

Automotive – LVDTs are used to measure the displacement of various components in automotive applications such as engine valves and gearboxes.

Robotics – LVDTs can be used to measure the position of robotic arms and other moving parts in industrial robots.

Research and Development – LVDTs are used in many research and development settings, such as measuring the displacement of materials in materials testing and measuring the position of components in test stands.

It’s worth noting that LVDT’s are used when linear measurements are needed, other types of sensors like encoders, resolvers, potentiometers and others might be more suitable depending on the application. 

How Do LVDT Sensors Work?

An LVDT typically measures displacement relative to an axis. The core of the LVDT is the moving part that is in contact with the object whose position is being measured, and it is designed to move along a specific axis. The position of the core relative to the axis is directly proportional to the electrical signal produced by the LVDT.

In most LVDT’s, there are three coils: a primary coil and two secondary coils. The primary coil is connected to an alternating current (AC) source, and the two secondary coils are connected in series opposition. When the core is in a neutral position, the induced voltage in the two secondary coils is equal and opposite, resulting in no net voltage output. When the core moves in one direction, the induced voltage in one of the secondary coils increases while the other decreases, resulting in a net voltage output that is proportional to the displacement of the core.

LVDT’s are often used in applications where high accuracy and stability are required, and they are not affected by temperature variations, electromagnetic interference, or other environmental factors. They are also relatively insensitive to external vibrations and mechanical shocks, making them suitable for use in harsh industrial environments.

Please browse our products section to find an LVDT that fits your needs. If you don’t find what you are looking for, we can custom design a product to your specifications and requirements. Visit our contact us page and fill out the form, we will reach out within 24-48 hours. Thanks for visiting us!