Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | Bently Nevada 125680-01 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Product Category | Proximity Probe Assembly |
| Probe Diameter | 8 mm |
| Measurement Range | 0.25 to 2.3 mm (10 to 90 mils) |
| Sensitivity | 7.87 V/mm (200 mV/mil) |
| Temperature Range | -40°C to +177°C |
| Cable Length | 5 meters |
| Connector Type | Military-style threaded |
| Tip Material | Inconel 600 |
| Housing Material | 316 Stainless Steel |
| Certifications | ATEX, IECEx, API 670 |
BENTLY 125680-01
Product Introduction
The Bently Nevada 125680-01 is a high-precision 8mm proximity probe assembly designed for critical machinery monitoring in demanding industrial applications. This complete transducer system provides accurate measurement of shaft vibration, position, and eccentricity in turbines, compressors, and other high-speed rotating equipment.
Part of Bently Nevada’s renowned 3300 XL series, the 125680-01 features an Inconel 600 tip for superior wear resistance and a 316 stainless steel housing that withstands corrosive environments. The assembly includes a 5-meter integral cable with military-style connector for reliable signal transmission to monitoring systems.
Core Advantages and Technical Highlights
Extended Measurement Capability:
2.3mm measurement range accommodates large shaft movements
7.87 V/mm sensitivity provides precise displacement data
±1% linearity across full operating range
0-10 kHz frequency response captures dynamic motions
High-Temperature Performance:
-40°C to +177°C operating range
Inconel 600 tip resists oxidation at elevated temperatures
Thermally stable electronics maintain calibration
Robust Industrial Design:
316 stainless steel construction for corrosion resistance
Military-grade connectors withstand vibration
Hermetically sealed against moisture ingress
API 670 compliant for critical machinery
System Integration:
Direct compatibility with 3300 XL monitoring systems
Pre-calibrated assembly for plug-and-play installation
ATEX/IECEx certified for hazardous areas
10-year calibration stability typical
Typical Application Scenarios
Gas Turbine Monitoring:
Shaft eccentricity measurement during startup
Thrust bearing position monitoring
Combustion casing expansion
Refinery Compressors:
Radial vibration monitoring
Axial position measurement
Seal gas system performance
Power Generation:
Steam turbine shaft vibration
Generator air gap monitoring
Hydraulic coupling alignment
Marine Propulsion:
Main reduction gear monitoring
Thrust bearing wear measurement
Stern tube bearing condition
BENTLY 125680-01
Related Model Recommendations
Bently Nevada 125680-02: 9m cable version
Bently Nevada 125690-01: 5mm probe alternative
Bently Nevada 3300/20: Proximitor power supply
Bently Nevada 3500/42M: Vibration monitor
Bently Nevada 330130-040: Extension cable kit
Bently Nevada 330901-00: Replacement probe tip
Installation and Commissioning
Installation Preparation:
Verify target surface condition (clean, smooth)
Check proper grounding of monitoring system
Prepare appropriate mounting hardware
Ensure adequate probe clearance
Commissioning Steps:
Mount probe at recommended location
Set initial gap voltage (-10V DC ±0.5V)
Verify system response across range
Test dynamic response with rotation
Document baseline measurements
Confirm alarm setpoints
Maintenance Recommendations:
Annual calibration verification
Quarterly probe tip inspection
Regular cable integrity checks
Monitoring of trend data
Replacement per OEM schedule
Service and Guarantee Commitment
Baker Hughes provides:
36-month warranty
Global technical support
NIST-traceable calibration
On-site service
Lifetime product support
The Bently Nevada 125680-01 is backed by Baker Hughes’ Machine Health Center with 24/7 support. All units include complete documentation and meet global certification requirements for industrial machinery protection.
