The UE Systems 4Site Continuous 4-Channel Online Ultrasound Monitoring System, engineered and manufactured by UE Systems Inc. (USA), is a dedicated fixed online condition monitoring platform designed to provide round-the-clock, 24/7 surveillance of four critical measurement points across rotating machinery and high-voltage electrical assets.

While periodic manual inspection routes leave equipment unmonitored between inspection intervals, the 4Site system maintains continuous real-time vigilance. Utilizing four hardwired Remote Access Sensors (RAS) mounted permanently onto critical bearing housings or electrical cabinets, the 4Site captures early-stage acoustic ultrasound energy. The instant micro-friction escalates from lubrication starvation, subsurface raceway fatigue, or ionization flashover, decibel levels spike, triggering automatic alarm relays long before mechanical vibration rises or thermal overheating occurs.

Key Engineering Features & Operational Advantages:
- 4 Dedicated Independent Ultrasound Channels: Continuously acquires and monitors four separate sensor lines with individualized baseline calibration and programmable alarm thresholds (Low Warning and High Alarm setpoints).
- Hardware Alarm Relays: Equipped with dedicated dry-contact relay outputs for each channel, allowing direct interface into local audio-visual stack lights, plant PLCs, DCS networks, or SCADA supervisory systems to generate automated plant alarms or initiate emergency equipment interlocks.
- Real-Time Heterodyned Audio Output: Demodulates raw high-frequency ultrasonic signals into audible audio streams, allowing vibration analysts and reliability specialists to connect headphones or external FFT vibration collectors to "listen" directly to the operational signature (distinguishing between dry friction, impact clicking, or electrical surface tracking).
- Historical Trend Logging & Ultratrend DMS Integration: Continuously archives decibel data points to establish asset degradation curves over time. Data easily exports into UE Systems' Ultratrend DMS software suite, enabling proactive maintenance scheduling and root-cause failure analysis.
- Rugged Industrial Enclosure: Housed in a durable industrial enclosure engineered to resist ambient dust, moisture, and workshop contaminants, suitable for wall-mounting adjacent to production machinery or integration within centralized electrical control cabinets.

Typical Industrial Applications:
- 24/7 continuous health monitoring of critical electric motor bearings, large chiller compressors, boiler feed pumps, and primary drivetrain gearboxes.
- Continuous partial discharge monitoring inside sealed medium-voltage switchgear lineups, ring main units (RMU), and power transformer enclosures.
- Remote acoustic monitoring of high-pressure safety relief valves and continuous steam trap loops.
- Monitoring critical equipment installed in hazardous, confined, or elevated machine locations inaccessible to regular manual walk-around inspections.

• Manufacturer: UE Systems (UE Systems Inc.)
• Country of Origin: USA
• Product Line: 4Site Continuous Online Ultrasound Monitoring System
• Model Designation: 4Site
• Number of Channels: 4 dedicated, simultaneous ultrasound channels
• Transducer Compatibility: Remote Access Sensors (RAS) or magnetic mount contact probes
• Frequency Response: Centered at 30 kHz (mechanical bearings) or 40 kHz (airborne/electrical)
• Measurement Dynamic Range: 0 to 100 dB (Decibels)
• Signal Processing: Solid-state digital heterodyne frequency conversion
• Alarm Configuration: Channel LED alarm indicators with programmable two-tier thresholds (Warning / Critical)
• Hardware Relay Outputs: 4 independent dry-contact Form C relays for PLC/SCADA integration
• Audio Output: Real-time heterodyned analog audio output jack for acoustic analysis
• Communication Interface: RS-232 / RS-485 serial communication or optional Ethernet network interface
• Software Compatibility: Ultratrend DMS (Data Management System) condition monitoring software
• Power Supply: 110V - 240V AC (50/60 Hz) or industrial 24V DC
• Ingress Protection: IP65 / NEMA 4X rated industrial enclosure (dust-tight and water-resistant)
• Enclosure Construction: Heavy-duty powder-coated industrial steel or reinforced polycarbonate housing
• Operating Temperature Range: -10°C to 50°C (14°F to 122°F)
• Mechanical Mounting: Wall-mount bracket or control cabinet backplate integration.