Description
Product Overview
330171-00-20-90-02-05 is a 3300 XL series eddy current proximity probe manufactured by Bently Nevada (Baker Hughes). It adopts non-contact eddy current sensing principle for measuring shaft radial vibration, thrust displacement and keyphasor speed signal of rotating equipment. This probe must be used together with matched extension cable and 3300 XL Proximitor sensor to realize real-time rotor dynamic monitoring and machine protection for turbines, compressors, generators and critical pumps.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | 330171-00-20-90-02-05 |
| Manufacturer | Bently Nevada |
| Series | 3300 XL 5mm Proximity Probe |
| Sensing Tip Diameter | 5 mm |
| System Total Length | 9.0 m |
| Thread Specification | 1/4-28 UNF |
| Tip Material | PPS high-temperature polymer |
| Cable Type | 75 Ω triaxial cable, non-armored |
| Linear Measuring Range | 0 to 1.27 mm |
| Sensitivity | 7.87 V/mm (200 mV/mil) |
| Probe Operating Temp | -35°C ~ +177°C |
| Cable Operating Temp | -51°C ~ +177°C |
| Connector Type | 4-pin triaxial connector |
| Housing Material | 304 Stainless Steel |
| Agency Certifications | CE, ATEX optional |
| Measurement Objects | Shaft vibration, axial thrust, keyphasor |
Key Features
- Non-contact eddy current measurement, no mechanical wear on rotating shaft surface
- 75-ohm triaxial cable design to suppress EMI interference in heavy industrial noise environment
- High temperature PPS tip, stable performance under high casing temperature
- Excellent linearity and repeatability, factory calibrated for consistent gap voltage output
- Rugged stainless steel probe body, fit for harsh oil, dust and high-temperature environments
- Compatible with full range of 3300 XL Proximitor sensors
- Customizable model coding for thread, probe length, cable length and connector selection
Application Scenarios
- Steam & gas turbine vibration and thrust monitoring
- Centrifugal compressors, expanders and blowers
- Turbo generator sets
- High-speed critical process pumps
- Rotating machinery protection and condition monitoring systems
Installation & Maintenance Notes
- Keep probe tip perpendicular to shaft target surface; install within the linear gap range
- Must pair with matched Bently Nevada 3300 XL extension cable and Proximitor; mismatched series causes accuracy error
- Avoid sharp bending of triaxial cable; strictly follow minimum cable bend radius requirement
- Implement single-point shielding grounding as Bently specification to reduce electrical noise
- Perform gap voltage test after installation before machinery startup
- Inspect cable insulation and connector tightness regularly during unit outage maintenance
- Recalibration is required after probe impact, cable damage or long-term operation
FAQ
Q: What does the model string 330171-00-20-90-02-05 stand for? A: 330171 = base part number for non-armored 5mm probe; 20 = case length option; 90 = total 9-meter system length; 02 = 1/4-28 UNF thread configuration; 05 = connector option.
Q: What is the difference between 5mm and 8mm Bently proximity probes? A: 5mm probe has smaller tip size for limited installation space; 8mm probe has larger linear range, usually applied for larger shaft vibration displacement measurement.
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