Vibration Meter

Quick Answer: The Vibration Meter is a handheld instrument that measures mechanical vibration through a sensor held or mounted on a machine, showing the result as acceleration, velocity or displacement. A vibration meter is used to check the condition of motors, pumps, fans and gearboxes, and to teach vibration in engineering labs.

Three Ways to Describe the Same Vibration

A vibrating surface moves back and forth, and that motion can be described by how far it moves (displacement), how fast it moves (velocity) or how quickly its speed changes (acceleration). Handheld meters of this kind usually use a piezoelectric accelerometer, a sensor that produces an electric charge when shaken, and derive velocity and displacement from its signal. Displacement highlights slow, large movements such as an unbalanced low-speed fan; acceleration highlights high-frequency effects such as early bearing damage; velocity sits between them and is the usual measure of overall machine condition.

The value of vibration measurement comes from repeating it the same way. Mark each measurement point on the machine, hold or mount the sensor at the same spot and in the same direction every time (horizontal, vertical or axial), and record readings with the machine at the same load. A reading that climbs over weeks is a stronger warning than any single number. Attachment matters too: a magnetic base or stud gives steadier readings than a hand-held probe.

In mechanical engineering labs the meter supports practicals on balancing, resonance and machine foundations, and pairs naturally with a tachometer, since vibration from unbalance appears at running speed. For wall-thickness checks on the same plant, see the ultrasonic thickness gauge.

Specifications

Applications

• Routine condition checks on pumps, motors and fans in plant rooms
• Balancing and resonance practicals in mechanical engineering labs
• Before-and-after checks when machines are realigned or bearings replaced
• Comparing vibration on the housings of lab machines such as centrifuges and shakers

Care & Handling

• Keep the accelerometer and its cable away from heat, oil and sharp edges.
• Never drop the sensor, because an impact can damage the piezoelectric element.
• Keep hands, cables and clothing clear of shafts and couplings while measuring.
• Record the point, direction and machine load with every reading.

Why Choose LabEquip

Polytechnics, engineering colleges and maintenance departments buy this instrument to introduce condition monitoring and to spot developing faults early. LabEquip lists it in General Lab Products; ask about sensor mounting options through the contact page.

Frequently Asked Questions

Which reading should I use, velocity, acceleration or displacement?

Velocity is the usual choice for overall machine condition across typical running speeds. Acceleration shows high-frequency problems such as bearing wear earlier, and displacement suits slow-running machines with large movements.

Why do my readings vary each time I measure?

Changes in sensor position, direction, pressure or machine load all change the reading. Mark measurement points, use a magnetic base where possible and measure under the same operating conditions.

What vibration level is acceptable?

It depends on the machine’s size, mounting and speed. Published severity charts give guidance by machine class, but the trend on the same machine is often more useful than any single limit.

Can it detect a bad bearing?

Rising acceleration readings, especially at high frequency, can point to bearing damage. Confirming the cause usually needs spectrum analysis or inspection, which a basic meter may not provide.

Is it safe to hold the sensor on a running machine?

Yes, on stationary casings and bearing housings, provided hands and cables stay clear of rotating parts and guards remain in place. Never measure on an exposed shaft or coupling.

Can it be used on lab equipment such as centrifuges?

It can measure vibration on the outer housing to compare units or spot changes over time. Unusual vibration in a centrifuge usually means an unbalanced load, which should be corrected before running.

Last Updated: September 2026