Vigilant - Permanent Ultrasound Monitoring

Overview

Vigilant is a permanent, continuous ultrasound monitoring system from SDT for mission-critical equipment. The system provides round-the-clock monitoring, early defect detection and integration with automation systems.

Features

System architecture

• A central unit for control and data processing
• Remote sensors — up to 16 channels
• Distributed architecture — sensors up to 100m from the unit
• Modularity — easy to scale

Measurement channels

• Ultrasound sensors — contact and airborne
• Temperature sensors — optional
• Vibration sensors — optional
• Digital inputs — for equipment status

Integration

• 4-20 mA analogue outputs
• Modbus TCP/IP — digital protocol
• OPC UA — for SCADA systems
• API — for custom integrations

Application areas

Critical equipment

• Turbines — steam, gas
• Turbogenerators — electrical generators
• Large electric motors — critical drives
• Main compressors — gas, air

Hazardous facilities

• Oil refining — refinery equipment
• Chemical plants — reactors, pumps
• Gas compressor stations — pipeline compressors
• Power facilities — power plants

Parameter monitoring

Ultrasound analysis

• Overall level — measurements in dBµV
• Spectral analysis — FFT spectra
• Comparison — against reference values
• Trends — historical data

Types of defects

• Friction and wear
• Cavitation
• Leaks
• Electrical discharges
• Imbalance

Advantages

Continuous protection

• 24/7 monitoring — round the clock
• Early warning — before catastrophic failure
• Equipment protection — against sudden failures
• Risk reduction — safe operation

Integration

• A unified system — with plant-wide monitoring
• SCADA/DCS — data feeds into control systems
• Auto-alarming — on deviations
• CMMS — integration with maintenance systems

Savings

• Less downtime — fewer unplanned outages
• Maintenance optimisation — predictive maintenance
• Equipment life — extended service life
• Insurance premiums — reduced

Configuration options

Compact

• Up to 4 channels
• A single unit
• Ideal for individual machines

Standard

• Up to 16 channels
• Distributed sensors
• Production lines

Enterprise

• Multiple units
• Plant-wide systems
• Centralised monitoring

Technical specifications

Parameter	Value
Channels	Up to 16 (expandable)
Frequency range	20-100 kHz
Analogue outputs	4-20 mA
Digital protocols	Modbus TCP/IP, OPC UA
Power	24V DC
Enclosure	IP65/IP67
Temperature	-40°C to +80°C
Mounting	DIN rail, wall mount

Software

Web interface

• Setup and configuration
• Trend viewing
• Alarming
• Reports

Integration

• PLC connection
• SCADA integration
• Cloud connectivity (optional)
• API access

Permanent Monitoring Solutions

Vigilant is part of the permanent-monitoring series:

• Vigilant — Modular system, up to 16 channels
• Online4US — 4-channel compact solution
• LUBEsense — Specialised lubrication sensors

When to choose Vigilant

Ideal for

• Critical equipment — high-value assets
• Hazardous areas — hard-to-access locations
• Continuous processes — cannot be shut down
• Complex systems — many monitoring points

ROI

• Pays for itself on the first prevented failure
• Reduced downtime of critical equipment
• Personnel safety
• Regulatory compliance