Description
Technical Specifications Table
| Parameter | Specification |
| Model Number | Bently Nevada 128229-01 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Product Type | Seismic Velocity Sensor |
| Measurement Range | 0-25.4 mm/s (1 in/s) peak |
| Frequency Response | 10 Hz to 1 kHz (±3 dB) |
| Sensitivity | 200 mV/mm/s (5.0 mV/mil/s) |
| Output Signal | 2-wire, 4-20 mA |
| Power Supply | 18-30 VDC loop powered |
| Housing Material | 316 Stainless Steel |
| Mounting | M10 x 1.5 threaded stud |
| Operating Temperature | -40°C to +120°C (-40°F to +248°F) |
| Environmental Rating | IP67 |
| Shock Resistance | 100 g, 11 ms half-sine |
| Compliance Standards | API 670, ISO 10816 |
BENTLY 128229-01
Product Overview
The Bently Nevada 128229-01 is a rugged industrial velocity transducer designed for continuous vibration monitoring of rotating machinery in demanding environments. This seismic sensor provides reliable velocity measurements for condition monitoring and predictive maintenance programs, enabling early detection of mechanical faults before catastrophic failure occurs.
As part of Bently Nevada’s comprehensive machinery protection portfolio, the 128229-01 features all-welded stainless steel construction with hermetic sealing for maximum durability. Its wide operating temperature range and IP67 environmental rating make it suitable for harsh applications in power generation, oil & gas, and heavy industry.
Key Features and Benefits
Precision Measurement:
Wide frequency response captures critical vibration components (10 Hz-1 kHz)
High sensitivity (200 mV/mm/s) for accurate diagnostics
Excellent linearity (±5% typical) across measurement range
Stable 4-20 mA output for direct system integration
Robust Construction:
316 stainless steel housing resists corrosion
Hermetically sealed against moisture ingress
Withstands 100 g mechanical shock
Vibration resistant to 20 g RMS
Installation Advantages:
Standard M10 mounting thread
Compact, low-profile design
Integral cable with strain relief
Maintenance-free operation
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 128229-01
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: 20 Nm (±10%)
Avoid over-tightening
Cable Routing:
Use proper cable glands
Maintain minimum bend radius
Secure at regular intervals
Electrical Connections:
Verify proper polarity
Check power supply (18-30 VDC)
Confirm 4-20 mA output range
Maintenance Procedures
Quarterly:
Visual inspection of sensor and cable
Verify mounting integrity
Check for corrosion or damage
Annually:
Sensitivity verification
Frequency response check
Cable integrity test
Troubleshooting:
No output: Check power and connections
Erratic signal: Inspect for cable damage
Drifting baseline: Verify mounting
Noise issues: Confirm proper 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 128229-01 provides reliable vibration monitoring for predictive maintenance programs, helping to prevent unexpected machinery failures in critical industrial applications.
