A4900 Vibrio M Ex

Vibration Meter, Analyzer and Data Collector in Intrinsically Safe Version

A4900 Vibrio Ex Vibration meter

The A4900 Vibrio M is avaliable in an Ex version. All basic vibro-diagnostics measurements are available: Overall Values, FFT Spectrum, Time signal, Frequency bands, Route measurement and Expert system for automatic fault source detection. You can listen to the signal with the headphones supplied with every unit.

The A4900 - Vibrio M Ex is equipped with 4 MB of memory for data storage. Data memory allows you to store off-route and route measurements.

A4900 Vibrio Ex Vibration meter

Key Features

  • All basic vibrodiagnostics measurements: Overall values, Time signal, Frequency bands, FFT Spectrum, Route measurement
  • 4 MB memory for data storage
  • Detects unbalance, loosenes, misalignment or bearing faults
  • ISO 10816-3 included
  • 8 hours of operation
  • Determines the condition of your bearings, including slow-running ones

Ex certification: II 2 G Ex ib IIC T4 Gb

Zone 1
Gas atmosphere
Ex ib
Principle of protection:
Intrinsic Safety EN 60079-11 , Zone 1
Gas group - Acetylene, Hydrogen
Temperature class 135°C
Equipment Protection Level – Zone 1
(high protection)

Technical Specifications

1 x ICP® powered Ex accelerometer (AC90x or AC91x)
Input range:
60 g PEAK with standard 100 mV/g sensor
Velocity RMS: 10 - 1 000 Hz [mm/s, ips]
Velocity PEAK: 10 - 1 000 Hz [mm/s, ips]
Acceleration RMS: 500 - 16 000 Hz [g]
Acceleration Peak: 500 - 16 000 Hz [g]
Velocity time: 1 - 1 000 Hz [mm/s, ips], 2048 samples *
Velocity spectrum: 1 - 1 000 Hz [mm/s, ips], 800 lines
Acceleration time: 1 - 16 000 Hz [g], 2048 samples*
Acceleration spectrum: 1 - 16 000 Hz [g], 800 lines*
Acceleration Demod-Envelope RMS: 500 - 16 000 Hz [g]
Acceleration Demod-Envelope Peak: 500 - 16 000 Hz [g]*
Acceleration Demod-Envelope time: 500 - 16 000 Hz [g], 2048 samples
Acceleration Demod-Envelope spectrum: 500 - 16 000 Hz [g], 800 lines, range 400 Hz*
Displacement RMS: 2 - 100 Hz [µm, mil]
Displacement 0-Peak: 2 - 100 Hz [µm, mil]
Displacement Peak-Peak: 2 - 100 Hz [µm, mil]

* available in DDS software for Vibrio
Other functions:
Vibration stethoscope
4 MB for data
120960 overall values
or 900 measurements of 800 line spectra
or 2048 sample time signals
Data storing:
Route with DDS software (free download)
USB 3.0, 2.0 compatible
Free version of DDS software (limited database size)
Colour graphic OLED display 128x128 pixels, diagonal 1.5“ (38 mm)
1 x AC signal 8 Ω / 0,5 W for external headphones (signal listening)
2 x AA 1.5V batteries (Energizer L91 Ultimate Lithium - 7 hours operation)
Operating: -20°C to 50°C
150 x 60 x 35 mm
330 g including batteries (without cable, sensor and  magnet)
540 g including batteries, cable, sensor and magnet
Ex vibration sensor (AC90x or AC91x), coiled cable to connect vibration sensor, magnetic base for vibration sensor, headphones with 3.5 mm jack, special USB cable, measuring tip for manual pressure on the sensor, transport case, USB flash drive with the manual

Data Sheets & Manuals

Data sheet vibration meter a4900 Vibrio M Ex

Data sheet


Manual vibration meter a4900 Vibrio


(English, Spanish)

Data sheet vibration meter a4900 Vibrio

DDS Quick Guide

(English, Spanish)