The Bently Nevada 330101-25-44-10-02-05 3300 XL 8 mm Proximity Probe is a precision non-contact eddy-current sensor developed for continuous monitoring of shaft vibration, axial position, and radial displacement in critical rotating machinery. As a member of the industry-proven 3300 XL 8 mm Proximity Transducer System, this probe delivers outstanding measurement accuracy, exceptional environmental stability, and dependable long-term performance for machinery protection and predictive maintenance applications. It is widely trusted in power generation, oil and gas, petrochemical, and heavy industrial facilities where equipment reliability is essential.
This configuration includes a 2.5 in. (63.5 mm) unthreaded length, a 4.4 in. (111.8 mm) overall case length, a 1.0 m (3.3 ft) integrated standard cable, a Miniature ClickLoc™ coaxial connector, and CSA, ATEX, and IECEx hazardous-area approvals. It is engineered to operate seamlessly with compatible 3300 XL Proximitor Sensors and 3300 XL Extension Cables, providing a complete transducer solution for continuous condition monitoring.
Engineering Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 330101-25-44-10-02-05 |
| Product Type | 3300 XL 8 mm Proximity Probe |
| Series | 3300 XL 8 mm Proximity Transducer System |
| Measurement Principle | Non-contact Eddy Current |
| Probe Diameter | 8 mm |
| Thread Size | 3/8-24 UNF |
| Unthreaded Length | 2.5 in. (63.5 mm) |
| Overall Case Length | 4.4 in. (111.8 mm) |
| Integrated Cable Length | 1.0 m (3.3 ft) |
| Cable Type | Standard FEP Cable |
| Connector Type | Miniature ClickLoc™ Coaxial Connector |
| Linear Measurement Range | 2.0 mm (80 mils) |
| Sensitivity | 7.87 V/mm (200 mV/mil) ±5% |
| Frequency Response | 0 Hz to 10 kHz |
| Operating Temperature | -51°C to +177°C (-60°F to +351°F) |
| Agency Approvals | CSA, ATEX, IECEx |
| Dimensions | Approx. Ø8 mm × 111.8 mm |
| Approximate Net Weight | 0.31 kg |
| Approximate Shipping Weight | 0.53 kg |
Recommended Industrial Applications
The 330101-25-44-10-02-05 is designed for permanent installation in machinery protection systems that require accurate and continuous shaft condition monitoring.
Typical applications include:
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Steam turbines
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Gas turbines
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Centrifugal compressors
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Industrial process pumps
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Electric motors
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Power generators
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High-speed gearboxes
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Fans and blowers
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Petrochemical processing plants
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Offshore oil and gas platforms
Its rugged construction and certified hazardous-area design make it an excellent solution for demanding industrial environments where operational continuity is critical.
Technical FAQs
1. What is the primary purpose of this proximity probe?
It provides non-contact measurement of shaft vibration, shaft displacement, and shaft position for rotating machinery using eddy-current sensing technology.
2. Which transducer system is this probe designed for?
It is specifically designed for the Bently Nevada 3300 XL 8 mm Proximity Transducer System.
3. What does the "25" option represent?
The 25 option specifies a 2.5-inch (63.5 mm) unthreaded probe length for greater installation flexibility.
4. What is the overall probe case length?
This model has a 4.4-inch (111.8 mm) overall case length based on its ordering configuration.
5. What cable length is supplied?
The probe includes a factory-installed 1.0 m (3.3 ft) standard FEP cable.
6. Which connector is fitted to this probe?
It uses a Miniature ClickLoc™ coaxial connector, providing secure electrical connections and simplified installation.
7. Does this model include hazardous-area approvals?
Yes. The Option 05 configuration includes CSA, ATEX, and IECEx certifications for qualified hazardous environments.
8. Which equipment commonly uses this probe?
It is commonly installed on turbines, compressors, generators, motors, pumps, and other fluid-film bearing machines requiring continuous shaft monitoring.
9. Can the probe operate by itself?
No. It must be paired with a compatible 3300 XL Proximitor Sensor and the appropriate extension cable to complete the transducer system.
10. Is this probe suitable for 24/7 online monitoring?
Yes. It is specifically engineered for continuous machinery protection and condition monitoring systems operating around the clock.
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