Velocity Transducer

Velocity transducers are used to measure velocity and displacement. As such, they have a wide range of industrial applications. There are manufacturers and distributors of velocity transducers all around the world. Listings of these companies can easily be found on the Internet.

At its core, a velocity transducer is basically made up of a suspended magnet surrounded by a conductive coil. The magnet moves when the transducer moves. This movement creates an electrical current that is proportional to the speed of the transducer. Hence, velocity is measured by interpreting the electrical signal generated. With integration, the displacement that results from the movement can be measured as well.

InstallationGravity is considered when mounting horizontal and vertical velocity transducers. The sensor should have an axis sensitive enough to linear movement. A cross-axis movement however, if strong enough, can damage the sensor or spoil the velocity measurement. Sometimes, sensors are placed on both axial planes to get a clearer signature of the movement.

After installing, there is no need to attune a velocity transducer. As long as it is in good working condition and is mounted on a flat surface, it should work fine. The sensor calibration does require verification once a year, however. Those moving parts inside the sensor break down from fatigue induced by vibration and high temperatures and they can fail in the long run.

It is recommended to dedicate a rigid conduit when installing a velocity transducer. The conduit protects the sensor from noise and mechanical mishaps. The conduit should be metal.

Go Through the Main PointsWhen installing velocity transducers it is necessary to determine the sensor type. This will let you know if you have the right device for your purpose and machine. Decide on the number of sensors that will be needed. It will help to examine the kind of movement and vibration that are to be expected.

Make sure you use the correct instrument wires. Have a rigid conduit ready and check the grounding. Pick the best location for installation. If these things are in order, then you are good to go.

For complex applications there are other more technical considerations, like sensitivity, frequency range and common point grounding. You may want to ask for expert advice from your local distributor or service company about these salient points.