Description
Technical Specifications Table
| Parameter | Specification |
| Model Number | Bently Nevada 18745-03 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Product Type | Industrial Piezoelectric Accelerometer |
| Sensitivity | 100 mV/g (±5%) |
| Measurement Range | ±50 g peak |
| Frequency Response | 1 Hz to 10 kHz (±3 dB) |
| Output Signal | 2-wire, 4-20 mA |
| Power Supply | 18-30 VDC, 2-20 mA |
| Resonant Frequency | >25 kHz |
| Housing Material | 316 Stainless Steel |
| Mounting | M6 threaded stud |
| Environmental Rating | IP67 |
| Operating Temperature | -40°C to +120°C (-40°F to +248°F) |
| Compliance Standards | API 670, ISO 10816 |
BENTLY 18745-03
Product Overview
The Bently Nevada 18745-03 is a rugged industrial accelerometer designed for continuous vibration monitoring in demanding industrial environments. This high-performance sensor provides reliable acceleration measurements for predictive maintenance programs, enabling early detection of mechanical faults in rotating equipment.
As part of Bently Nevada’s comprehensive condition monitoring portfolio, the 18745-03 features integrated electronics (IEPE) for simplified installation and signal conditioning. Its robust stainless steel construction and wide operating temperature range make it particularly suitable for harsh applications in power generation, oil & gas, and heavy industry.
Key Features and Benefits
Precision Measurement:
Wide frequency response (1 Hz to 10 kHz)
High sensitivity (100 mV/g) for early fault detection
Excellent linearity (±1% typical)
Low noise floor for accurate diagnostics
Durable Construction:
316 stainless steel housing resists corrosion
Hermetically sealed (IP67) against moisture
Withstands 500 g mechanical shock
Vibration resistant to 20 g RMS
Installation Advantages:
Compact, low-profile design
Standard M6 mounting thread
Integral cable with strain relief
No external charge amplifier required
Industrial Applications
Power Generation:
Steam turbine bearing monitoring
Generator vibration analysis
Cooling fan condition monitoring
Oil & Gas:
Centrifugal compressor protection
Pump vibration monitoring
Gas turbine auxiliary systems
Heavy Industry:
Large motor bearing analysis
Gearbox vibration monitoring
Rolling mill equipment protection
Installation Guidelines
BENTLY 18745-03
Mounting Surface Preparation:
Clean, flat surface (Ra < 3.2 μm)
Degrease mounting area
Apply light thread lubricant
Sensor Installation:
Hand-tighten plus 1/4 turn with wrench
Recommended torque: 5-7 Nm
Avoid over-tightening
Cable Routing:
Use proper cable glands
Maintain minimum 50 mm bend radius
Secure every 300 mm
Electrical Connections:
Verify proper polarity
Check for 18-30 VDC supply
Confirm 2-20 mA output range
Maintenance Procedures
Quarterly:
Visual inspection of sensor and cable
Verify tightness of mounting
Check for corrosion or damage
Annually:
Sensitivity verification
Frequency response check
Cable integrity test
As Needed:
Recalibration if measurements drift
Replacement if damaged
Software updates for monitoring system
Troubleshooting Guide
| Symptom | Possible Cause | Corrective Action |
| No output | Wiring fault | Check connections |
| Erratic signal | Loose mount | Retighten sensor |
| Low sensitivity | Damaged element | Replace sensor |
| Excessive noise | Ground loop | Verify grounding |
Warranty and Support
Coverage:
24-month limited warranty
Covers defects in materials/workmanship
Excludes physical damage or misuse
Support Services:
Global technical assistance
Application engineering
Repair and recalibration
Spare parts availability
Documentation:
Installation manuals
Technical bulletins
Safety guidelines
Certificates of conformance
The Bently Nevada 18745-03 accelerometer provides reliable vibration monitoring for predictive maintenance programs, helping to prevent unexpected machinery failures and reduce downtime in critical industrial applications. Its rugged design and precision measurement capabilities make it an ideal choice for demanding condition monitoring applications.
