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3500/50

Bently Nevada 3500/50
Seismic Vibration Monitor Module

Core Features:
• Dual-Channel Input (2x proximity probes)
• 0-25.4mm (1") Measurement Range
• 4-20mA + Modbus Outputs

Key Specs:
✓ 0.5Hz-10kHz Frequency Range
✓ ±1% Accuracy
✓ SIL 2 Functional Safety

Protection Functions:

4 Adjustable Thresholds

Sensor Fault Detection

Gap Voltage Monitoring

Applications:

Turbine Casing Vibration

Structural Health Monitoring

Seismic Event Detection

Compliance:
• API 670 5th Ed.
• DNV-GL Marine

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Bently Nevada 3500/50
Proximitor® Seismic Monitor Module

Key Specifications:
• Input Channels: 2 independent seismic probe inputs
• Signal Type: Accepts 3300XL proximity probes (8mm/11mm)
• Measurement Range: 0-25.4mm (0-1 inch) peak-to-peak

Technical Parameters:
✓ Frequency Response: 0.5Hz-10kHz (±3dB)
✓ Accuracy: ±1% of full scale
✓ Resolution: 0.1μm
✓ Dynamic Range: 80dB

Protection Functions:

Adjustable alert/danger thresholds (4 total)

Gap voltage monitoring (-10V DC ±0.5V)

Sensor fault detection

Electrical Characteristics:

Power Requirement: +24VDC ±10%

Outputs:
• 4-20mA (2 channels, isolated)
• RS-485 Modbus RTU
• Relay contacts (2 alarm + 1 fault)

Environmental Ratings:

Operating Temp: -40°C to +70°C

Humidity: 5-95% non-condensing

Protection: IP20 (rack-mounted)

Certifications:
• API 670 5th Edition
• SIL 2 (IEC 61508)
• DNV-GL Marine Type Approved

Typical Applications:

Turbine casing vibration

Pipeline seismic monitoring

Nuclear plant structural monitoring