Designed for Accurate Machinery Protection and Long-Term Reliability
The Bently Nevada 330851-02-000-040-10-00-05 3300 XL 25 mm Proximity Probe is a precision non-contact eddy current sensor developed for continuous monitoring of shaft position, differential expansion, and rotor displacement in critical rotating equipment. As part of the 3300 XL 25 mm Proximity Transducer System, this probe delivers exceptional measurement accuracy, excellent linearity, and outstanding long-term stability. When paired with the corresponding 3300 XL 25 mm Extension Cable and Proximitor Sensor, it forms a complete transducer system capable of providing reliable data for machinery protection and predictive maintenance.
Configured with an M30 × 2 threaded probe body, 40 mm overall case length, 1.0 m integral FluidLoc cable, non-armored construction, and multiple agency approvals, the 330851-02-000-040-10-00-05 is one of the standard stocked configurations within the 3300 XL product family. Its compact design, durable stainless-steel housing, and high-performance sensing technology make it ideal for steam turbines, compressors, generators, and other mission-critical rotating assets.
Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 330851-02-000-040-10-00-05 |
| Product Type | 3300 XL 25 mm Proximity Probe |
| Product Series | 3300 XL 25 mm Proximity Transducer System |
| Measurement Principle | Non-contact Eddy Current |
| Probe Case Type | M30 × 2 Metric Thread |
| Unthreaded Length | 0 mm |
| Overall Case Length | 40 mm |
| Integral Cable Length | 1.0 m (3.3 ft) |
| Cable Type | 75 Ω FluidLoc Triaxial Cable |
| Armor Option | No Armor |
| Agency Approval | Multiple Approvals |
| Probe Case Material | AISI 304 Stainless Steel |
| Probe Tip Material | Polyetheretherketone (PEEK) |
| Output Sensitivity | 20 mV/mil (0.787 V/mm) |
| Linear Measurement Range | 12.7 mm (500 mils) |
| Operating Temperature | -35°C to +200°C |
| Compatible Components | 3300 XL 25 mm Extension Cable & Proximitor Sensor |
| Typical Measurements | Differential Expansion, Shaft Position, Rotor Displacement |
| Dimensions | M30 × 2 Thread × 40 mm Overall Case Length |
| Weight | Approximately 0.23 kg |
Typical Applications
The 330851-02-000-040-10-00-05 is engineered for continuous online monitoring of critical machinery operating in demanding industrial environments.
Typical applications include:
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Steam turbine supervisory instrumentation (TSI)
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Differential expansion monitoring
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Axial shaft position measurement
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Rotor displacement monitoring
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Steam turbine generators
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Industrial gas turbines
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Centrifugal compressors
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Turbo-expanders
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Power generation facilities
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Petrochemical processing plants
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Oil & gas production systems
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Refinery rotating equipment
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Heavy industrial manufacturing
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OEM machinery protection packages
Its compact 40 mm probe body allows straightforward installation while maintaining the high accuracy required for modern machinery protection systems.
Product Advantages
Built to meet the requirements of continuous industrial operation, this proximity probe offers dependable performance and long service life.
Key Benefits
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Precision non-contact eddy current sensing
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Standard stocked configuration for faster replacement
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Compact 40 mm probe body
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Wide 12.7 mm (500 mil) linear measurement range
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Rugged AISI 304 stainless-steel construction
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High-temperature PEEK probe tip
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Excellent resistance to vibration and harsh operating conditions
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Fully compatible with Bently Nevada 3500 Series monitoring systems
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Multiple agency approvals for global industrial projects
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Supports predictive maintenance and improves equipment availability
Technical FAQs
1. What is the primary function of the 330851-02-000-040-10-00-05?
It measures shaft displacement, differential expansion, and axial shaft position using non-contact eddy current technology.
2. Which transducer system does this probe belong to?
It is part of the 3300 XL 25 mm Proximity Transducer System, consisting of a probe, extension cable, and Proximitor Sensor.
3. What does the "02" case option indicate?
The 02 suffix specifies an M30 × 2 metric threaded probe body.
4. What does the "040" option represent?
It designates an overall probe case length of 40 mm. This is one of the standard metric case lengths offered for the 3300 XL 25 mm series.
5. What cable length is included?
This configuration is supplied with a 1.0-meter (3.3-foot) integral FluidLoc triaxial cable.
6. Is the cable armored?
No. The 00 armor option indicates a standard non-armored cable.
7. What does the "05" approval code mean?
The 05 suffix indicates Multiple Agency Approvals, making the probe suitable for a broad range of international industrial installations.
8. What measurement range does the complete transducer system provide?
When used with the matching Proximitor Sensor and extension cable, the complete system provides a 12.7 mm (500 mil) linear measurement range with an output sensitivity of 20 mV/mil (0.787 V/mm).
9. What are the approximate dimensions and weight?
The probe features an M30 × 2 threaded body, 40 mm overall case length, and weighs approximately 0.23 kg.
10. Why is this model widely selected for turbine monitoring?
Its compact design, factory-standard configuration, high measurement precision, and compatibility with Bently Nevada machinery protection systems make it an excellent solution for continuous monitoring of critical rotating equipment.
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