metro B6012 portable vibration analyzer and dynamic balancer logo

Easiest vibration analyzer and portable balancer

metroTM B6012 is designed for vibration analysis and field balancing of different types of rotors, blowers, impellers, industrial fans, motors, cooling towers, HVAC systems, grinders, mixers, crushers, spindles and other similar rotating machine structures.
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Automatic 2-round field balancing demonstration

2 innovative steps towards balancing

Automatic balancing combines the real time processing capabilities of digital world with the ease of use of visually locating point of unbalance of classical world

Reliability and accuracy of today

Convenience and ease of use of the past

Vibration analyzer and balancer details

How to locate point of unbalance in field dynamic balancing

Do not add / remove trial weight anywhere!

Locate exact point of unbalance in first round using Automatic 2-round balancing method.
No need to worry about increasing vibrations due to unbalance in second round because operation is performed at point of unbalance in first round.
Automatic machine speed determination from unbalance signal at 1 x machine RPM without requiring tachometer signal using digital FFT techniques.

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Verify causes of vibrations before balancing

Analyze unbalance, looseness, misalignment, bent shaft or similar problems occurring at less than 5 times of machine speed with 3 Hz / 180 RPM of FFT spectral resolution up-to 1000 Hz.
Analyze bearing problems occurring at greater than 3.5 times of machine speed with 12 Hz / 720 RPM of FFT spectral resolution up-to 5000 Hz.
Improved FFT performance with inbuilt Hanning window, overlapping and averaging techniques.
Analyze vibrations with real time FFT spectrum
3 methods of field balancing to suit different applications

3 methods for balancing to suit field conditions

We designed 3 types of balancing modes based on how to determine machine speed for balancing
  • When unbalance dominates the vibration spectrum, automatic balancing determines machine speed from vibration signal
  • Built-in tachometer to get angle of unbalance in degrees
  • Manual entry of machine speed is also allowed like the olden days.

Inbuilt tachometer with up-to 70 cm optical range

Locate angle of unbalance in degrees with in-built laser guided tachometer as reference for balancing.
Point tachometer in-line with the accelerometer to measure angle of unbalance in the direction of rotation in first round of balancing.
Built-in tachometer for RPM measurement and synchronization
Pause vibration spectrum and analyse causes of vibrations

Pause real-time FFT spectrum for analysis

Navigate through the spectrum to check vibration severity at different frequencies.
Frequency zooming for better graphical display resolution.
Hold real-time spectrum update for careful inspection.
Amplitude zooming also possible when viewing saved spectrum data.

Easy to use vibration analysis for beginners and technicians

Don’t want to struggle with understanding vibration spectrum? Levels mode derives the top 6 frequencies in descending order of their contribution to total vibration severity. You can relate each of the frequencies with certain kind of problem, for example frequency at 1 x machine speed suggests unbalance, at 2 x machine speed suggests looseness and likewise.
Better frequency accuracy is achieved through FFT interpolation techniques.
Simplified vibration spectrum for determining causes of vibrations
Save every vibration and balancing data

Save analysis and balancing data per machine

Provide numerical representation for every machine for analysis.
Data is saved as a combination of ‘machine number’ and ‘trial number’ with ‘trial number’ being automatically incremented.
Save multiple vibration spectrum readings with the same machine number for easy analysis.

Connect to computer for data transfer and report generation

Transfer saved vibration spectrum, export data in excel file for future import from your computer with our analyzer software
Annotate vibration spectrum and save images to generate analysis reports.
Generate and analyse report from saved vibration data

Reliable hardware integration for unit conversion

Get stable and precise balancing and FFT analysis results with accurate unit conversion from acceleration to velocity / displacement. This can be less than 1 mm/s RMS at 1800 RPM or less than 100 microns peak-to-peak at 1200 RPM for appropriate machine structure.

Digital True RMS total vibration level calculation

Ensure reliable total vibration amplitude with true digital RMS calculation at high sampling rate.

Constant current accelerometer with shielding for increased reliability

Do not let field conditions degrade your vibration signal from accelerometer with faraday’s cage shielding and loop powered accelerometer.

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Check comparison of Automatic balancing

Comparison of field balancing methods


Automatic balancing

Conventional balancing

Total no. of rounds




Vibration sensor

Reflective tape as zero mark

First round

Exact location of unbalance

Initial amplitude & arbitrary angle

Second round

Final weight with exact location of unbalance

Add trial weight at arbitrary location. New amplitude and arbitrary angle

Third round

Not required

Final weight with exact location of unbalance

Removal of trial weight

Not required


Location of unbalance

Exact w.r.t. reference

Relative w.r.t reference

Unbalance indication

Visually using high brightness stroboscope

Angle in degrees w.r.t reference

Ease of unbalance location

Easy to visually locate location w.r.t. reference

Difficult to measure angle visually, e.g. 69.5 degrees w.r.t. zero mark.

Get your setup ready within 5 minutes

Do not waste time setting up tachometer in unfavorable lighting and / or mounting conditions for balancing.
Connect vibration sensor and high brightness stroboscope to proceed with automatic balancing in minutes.

Designed for your safety on-field

Technician’s safety on-field is very important. Work with standard 10 feet long accelerometer cable and check point of unbalance using high brightness stroboscope from a safe distance.
No need to mount tachometer near the machine under maintenance where it probably can get damaged.


Instrument is calibrated according to NABL certified ISO 17025 international standard. 6-point calibration certificate is provided.

Download product brochure for detailed specifications

Analysis frequency range 1 Hz to 5000 Hz (60 RPM to 300000 RPM).
Measurement units mm/s, g, m/s², micron (μm)
Type of average RMS, peak and peak-to-peak
Measurement range velocity              : 0 to 300 mm/s RMS
acceleration       : 0 to 15 g RMS
displacement     : 0 to 2000 microns peak to peak
Total vibration measurement type True RMS
Unit conversion Hardware integration
Fast Fourier Transform (FFT)
Vibration signal spectrum with 1024 lines of resolution.
Sensitivity up-to -26dB
Analysis frequency bands
a. 3 Hz to 1024 Hz with 3 Hz of resolution
b. 12 Hz to 5000 Hz with 12 Hz of resolution
Balancing frequency range 1Hz to 1000Hz (60 RPM to 60000 RPM)
Methods of Balancing
Introducing the concept of 2-round balancing with implementation in different modes
1. Automatic balancing method
2. Built-in tachometer guided balancing method
3. Manual balancing method
Unbalance indication
a) Using stroboscope/ strobe light
b) Angle (in degrees) with respect to reflective tape when using built-in tachometer
Input signal level 4mV to 4.8V peak-to-peak
Sensitivity: -40dB
Accelerometer type Constant current accelerometer, magnetic mount, 10-ft polyurethene jacketed cable 
Accelerometer sensitivity 100mV/g (standard) +/- 10%
Tachometer type Built-in infrared tachometer with laser pointing and LED receiver indication
Tachometer measuring RPM 10 to 60000 RPM
Tachometer range 10 to 60 cm
Autoscale Yes
Real time clock Yes
Auto power-off Yes
Processor DSP controller at 120 MHz
Display 128x64 graphic LCD with back-light adjustment
Keypad Membrane keys
Power supply 11.1V/2.2AH Li-ion battery with charger
Power usage 11.1V/106mA (more than 7hrs. of continuous operation)
Overall dimensions 125 x 225 x 50mm (approx.)
Weight 700 grams (approx.)
Flash light Xenon flash
Power supply Country specific (230V/50Hz OR 120V/60Hz)


Frequently asked questions for metro B6012

What prior knowledge is required to use the instrument?
Basic knowledge on the requirement of field balancing and vibration analysis is sufficient to get started with the instrument. The instrument will help provide insight on where field balancing is required.
How is the learning curve to understand and use the instrument?
Can I use it for inert gas (IG) blower balancing?
Is it possible to pause, zoom and navigate real time FFT vibration spectrum?
Can I save balancing and analysis data and generate report on computer?
Automatic balancing is unable to determine stable machine speed OR is showing stable speed which is a multiple of machine speed
What if amplitude of vibrations at machine speed (1 x RPM) increases in second round of automatic balancing?