Bruel & Kjaer VC-868/1 Vibration Monitor

Overview

The Bruel and Kjaer VC-868/1 is a vibration monitor of the legacy VIBROCONTROL series, providing continuous vibration monitoring for rotating machinery. The VIBROCONTROL instruments convert the signal from the vibration sensor into alarm and trip functions for the machinery protection system, and they operate from the standard plant supply. The model was part of the Bruel and Kjaer industrial instrumentation programme and has been succeeded by later VIBROCONTROL generations in new installations.

The VC-868/1 is panel mounted in the control cabinet and accepts the standard vibration sensor input of the VIBROCONTROL series. The alarm setpoint is adjusted during commissioning, and the DC output is wired to the recorder or the plant control system. The instrument operates from the plant supply and is verified with the simulated signal before the machine is started, following the standard practice for the legacy Bruel and Kjaer monitoring channels.

Engineering and Design

The VC-868/1 receives the signal from the vibration sensor mounted on the machine, conditions it and compares the level with the alarm setpoints of the channel. When the setpoint is exceeded, the monitor operates the alarm output, and the measured value is available as a DC signal for the recorder or the plant control system. The monitor is designed for continuous service on rotating equipment with the alarm thresholds adjusted during commissioning.

The VIBROCONTROL line was offered in the 868, 920 and 1000 series with different channel and display configurations, and the VC-868/1 follows the compact panel format of the family. The instrument is powered from the plant supply and accepts the standard vibration sensor input of the series. For plants that keep a legacy Bruel and Kjaer monitoring system in operation, the VC-868/1 is supplied as a verified spare channel with the original configuration.

The VC-868/1 monitor is panel mounted in the control cabinet with the sensor cable routed from the machine to the input terminals. During commissioning the alarm setpoint is adjusted to the machine train, and the DC output is connected to the recorder or the plant control system for continuous monitoring of the vibration level. The instrument is powered from the plant supply and is verified with the simulated signal before the machine is started. The alarm threshold is set according to the protection philosophy of the plant, and the verification is recorded in the commissioning report. The monitor accepts the standard vibration sensor input of the VIBROCONTROL series, which keeps the channel compatible with an existing Bruel and Kjaer sensor set. The instrument is supplied as a verified spare with the original configuration of the series, and the panel cut-out follows the standard VIBROCONTROL format. Plants that operate a legacy Bruel and Kjaer monitoring system keep the VC-868/1 as a drop-in spare channel, which shortens the repair time when a monitor fails. The measured values are cross-checked with the portable vibration analyzer during the periodic verification of the protection system. The alarm output is wired into the protection circuit of the monitored machine. The panel cut-out matches the existing cabinet opening of the legacy installation.

Key Features

• Continuous vibration monitoring for rotating machinery
• Alarm setpoints adjustable during commissioning
• DC output for recorder or control system
• Panel mounted legacy VIBROCONTROL instrument
• Operates from plant supply
• Supplied as verified unit

Applications

The VC-868/1 is used on pumps, fans, compressors and motors in industrial plants where a legacy Bruel and Kjaer vibration monitoring channel must remain in service, or where a simple and proven vibration alarm channel is required.

Specifications

Why Seven Star LLC

Seven Star LLC supplies Bruel and Kjaer legacy vibration instruments, including the VC-868/1, to maintenance and reliability teams across Oman and the GCC. Every part number is checked before your order is confirmed, and our team verifies the monitor configuration and the matching sensor set. Because the 868 family has been superseded by newer VIBROCONTROL platforms, we are upfront about realistic sourcing timelines for a genuine spare or replacement unit, and we do not promise availability we cannot deliver. Where a specific VC-868/1 cannot be located within a workable timeframe, we help evaluate whether a repair of the existing monitor or a planned migration to a currently supported platform better fits your plant’s maintenance schedule and budget.

For facilities operating multiple 868-series monitors across a shared machinery train, we also help plan spares coverage around scheduled maintenance rather than reactive failures, so a single unit going down does not force an unplanned response while a replacement is sourced. If your team is weighing an eventual upgrade path, we are glad to review your current sensor wiring and alarm configuration first, so any recommendation reflects your actual installation rather than a generic upgrade pitch. Send us your current panel configuration and alarm setpoints, and we will confirm the best available path forward along with a realistic timeline before you commit to anything, so your maintenance planning stays on schedule regardless of which option you end up choosing for your facility and its own specific operating and safety requirements.

Request a Quote for Bruel & Kjaer VC-868/1 Vibration Monitor

Submit a formal inquiry through our RFQ page with the VC-868/1 part number and your sensor configuration. We will confirm the matching channel and respond with a formal quotation. | Inquiry Form

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See also: Brüel & Kjær Vibro VC-6000 SM-610-A01 Monitoring Module.