Description
Technical Specifications Table
| Parameter | Specification |
| Model Number | Bently Nevada 18745-04 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Product Type | Piezoelectric Accelerometer |
| Sensitivity | 100 mV/g (±5%) |
| Frequency Range | 1 Hz to 10 kHz (±3 dB) |
| Measurement Range | ±50 g peak |
| Output Signal | 2-wire, 4-20 mA |
| Power Supply | 18-30 VDC loop powered |
| 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 | API 670, ISO 10816 |
BENTLY 18745-04
Product Overview
The Bently Nevada 18745-04 is a rugged industrial accelerometer designed for continuous vibration monitoring of rotating machinery in demanding environments. This high-performance sensor provides reliable acceleration measurements for condition-based maintenance programs, enabling early detection of developing mechanical faults.
As part of Bently Nevada’s comprehensive machinery protection portfolio, the 18745-04 features robust construction with all-welded stainless steel housing and integrated electronics. Its wide frequency range and excellent temperature stability make it particularly suitable for monitoring high-speed equipment where early detection of bearing defects and other mechanical issues is critical.
Key Features and Benefits
Precision Measurement Capabilities:
Wide frequency response (1 Hz to 10 kHz) captures both low and high-frequency vibration components
High sensitivity (100 mV/g) ensures accurate detection of subtle vibration changes
Excellent signal-to-noise ratio for reliable diagnostics
4-20 mA output for direct integration with control systems
Durable Industrial Design:
316 stainless steel housing resists corrosion and mechanical damage
Hermetically sealed construction (IP67) protects internal components
Withstands high levels of mechanical shock (up to 500 g)
Integrated electronics eliminate need for separate charge amplifiers
Installation and Maintenance Advantages:
Compact, low-profile design fits in space-constrained locations
Standard M6 mounting thread for secure attachment
Integral cable with strain relief for reliable connections
Maintenance-free operation with no moving parts
Industrial Applications
The Bently Nevada 18745-04 is ideally suited for:
Power Generation: Steam and gas turbine bearing monitoring
Oil & Gas: Compressor and pump vibration measurement
Petrochemical: Critical rotating equipment protection
Wind Turbines: Gearbox and generator monitoring
Pulp & Paper: Roll and dryer section vibration analysis
Typical monitored faults include:
Bearing defects (inner/outer race, rolling element)
Gear tooth damage
Mechanical looseness
Rotor rub conditions
Imbalance and misalignment
BENTLY 18745-04
Compatible and Related Products
Bently Nevada 18745-05: High-temperature version (+150°C limit)
Bently Nevada 18745-06: Hazardous area certified (ATEX/IECEx) variant
Bently Nevada 3300/25: Seismic monitor for vibration measurement
Bently Nevada 3500/42: Vibration monitor for system integration
Bently Nevada 1900/65: Proximity transducer system for displacement measurement
Installation and Maintenance Guidelines
Installation Best Practices:
Mount directly on machine bearing housings at measurement points
Ensure clean, flat mounting surface (surface finish <3.2 μm Ra)
Tighten to recommended torque (typically 5-7 Nm)
Route cable away from moving parts and heat sources
Use proper cable glands for environmental protection
Maintenance Recommendations:
Annual visual inspection of sensor and cable
Verify mounting integrity during routine maintenance
Check for proper signal output during system calibration
Replace if physical damage is observed or measurements become erratic
Use only genuine Bently Nevada replacement parts
Warranty and Support
Bently Nevada provides:
24-month standard warranty
Global technical support network
Application engineering assistance
Comprehensive documentation
Calibration and repair services
The 18745-04 accelerometer is backed by Bently Nevada’s extensive experience in machinery protection systems, ensuring reliable performance throughout its service life.
This technical product description provides a complete overview of the Bently Nevada 18745-04 accelerometer, presenting detailed specifications, features, and application information in a professional format suitable for industrial users and procurement specialists. The content is optimized for both technical accuracy and marketing effectiveness while maintaining readability.
