Brand:

Bruel & Kjaer Vibro VC-920 Vibration Monitor

Description

Overview

The Bruel & Kjaer Vibro (Vibrocontrol) 920 is a compact, single-channel vibration monitor for permanent machine protection. It measures vibration velocity in RMS according to ISO 10816, compares the value with two adjustable alarm limits (Alert and Danger), and drives relay outputs for annunciation and machine shutdown – all in a small DIN-rail or mounting-plate enclosure for control-cabinet installation.

Engineering and Design

The VC-920 accepts acceleration sensors (AS-022, AS-062 CCS, ASA-022 Ex) or velocity sensors (VS-068, VS-069, VS-0168, VS-0169), supplying -24 V DC sensor power up to 30 mA. Measuring ranges are 0-10, 0-20, 0-50 or 0-100 mm/s RMS over a frequency range of 10 to 1000 Hz, with 5% accuracy of the measured value. Each alarm channel has an adjustable 0-100% of range limit and an adjustable delay of 0-100 s to avoid false trips during start-up or transient events.

Outputs include a 0/4-20 mA analog output (load under 500 ohms, or 0-10 V) for the DCS/PLC, plus alarm, shutdown and OK relays with latching or non-latching selection. Power can be 230/115 V AC +/-15% (about 12 VA) or 24 V DC (18-32 V, about 7 W). The unit operates from 0 to +50 C and is housed in a plastic IP20 enclosure measuring 150 x 78 x 115 mm at about 0.9 kg.

Key Features

  • Single-channel vibration velocity monitor per ISO 10816 (DIN 10816)
  • Two adjustable alarm limits (Alert, Danger) with 0-100 s delay
  • Alarm, shutdown and OK relays; latching or non-latching
  • Measuring ranges 0-10/20/50/100 mm/s RMS, 10-1000 Hz, 5% accuracy
  • Works with B&K Vibro acceleration and velocity sensors; -24 V sensor supply
  • 0/4-20 mA analog output (load under 500 ohms) or 0-10 V
  • Dual power: 230/115 V AC +/-15% or 24 V DC (18-32 V)
  • Compact 150 x 78 x 115 mm plastic housing; DIN rail or mounting plate

Applications

Permanent vibration monitoring and protection of fans, pumps, motors, gearboxes and rotating machines in power plants, oil and gas, water and general industry, with alarms per ISO 10816.

Specifications

Channels1
SensorsAcceleration AS-022, AS-062 CCS, ASA-022 Ex; velocity VS-068, VS-069, VS-0168, VS-0169
Sensor Power-24 V DC, max 30 mA (or 4 mA CCS)
Measuring Ranges0-10 / 0-20 / 0-50 / 0-100 mm/s RMS
Frequency Range10 to 1000 Hz
Accuracy5% of measured value
Alarms2 (Alert, Danger), adjustable 0-100% of range; delay 0-100 s
RelaysAlarm, shutdown and OK; latching or non-latching; closed or open circuit
Analog Output0/4-20 mA, load under 500 ohms (or 0-10 V)
Power Supply230/115 V AC +/-15%, about 12 VA; or 24 V DC (18-32 V), about 7 W
EnclosurePlastic, IP20; 150 x 78 x 115 mm; about 0.9 kg
Operating Temperature0 to +50 C; storage -10 to +70 C
StandardISO 10816 (DIN 10816)

Why Seven Star LLC

Seven Star LLC supplies original Bruel & Kjaer Vibro VC-920 monitors, sensors and accessories for machine-protection projects across Oman and the GCC. We verify every unit against the B&K Vibro specification and support sensor selection, configuration and commissioning.

Call To Action

Send your machine type, sensor requirement and alarm philosophy to our engineering team for a quotation. Use the Inquiry Form below and attach your datasheet or protection specification – we confirm availability and pricing. | Inquiry Form

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About brand
Brüel & Kjær is a world-renowned manufacturer of sound and vibration measurement equipment, trusted by engineers and research professionals across aerospace, automotive, energy, and industrial sectors. Founded in Denmark in 1942, the company has become synonymous with precision, innovation, and acoustic excellence. Its product portfolio includes vibration monitoring systems, microphones, accelerometers, analyzers, and software platforms designed for accurate testing and diagnostics. Brüel & Kjær technologies are widely used in product development, structural testing, and predictive maintenance to ensure performance, safety, and reliability. Seven Star LLC proudly supplies genuine Brüel & Kjær products, providing customers in the Middle East and beyond with advanced noise and vibration analysis solutions backed by industry-leading expertise and global support.
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Bruel & Kjaer Vibro VC-920 VIBROCONTROL 920 Vibration Monitor
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Frequently Asked Questions

What does the VC-920 measure?
It measures vibration velocity in RMS over 10 to 1000 Hz, with selectable ranges of 0-10, 0-20, 0-50 or 0-100 mm/s RMS, in accordance with ISO 10816.
Which sensors work with the VC-920?
It works with B&K Vibro acceleration sensors (AS-022, AS-062 CCS, ASA-022 Ex) and velocity sensors (VS-068, VS-069, VS-0168, VS-0169), with -24 V DC sensor power up to 30 mA.
How are alarms configured?
Two alarms (Alert and Danger) are each adjustable from 0 to 100% of the measuring range with an adjustable delay of 0 to 100 seconds. Alarm, shutdown and OK relays can be latching or non-latching.
What output signal is provided to the control system?
A 0/4-20 mA analog output with load under 500 ohms (or 0-10 V) is provided for the DCS or PLC, in addition to the relay outputs.
What power supply options does the VC-920 have?
It accepts 230/115 V AC +/-15% (about 12 VA) or 24 V DC (18-32 V, about 7 W). It operates from 0 to +50 C in a plastic IP20 enclosure (150 x 78 x 115 mm, about 0.9 kg).