Introduction
The Bently Nevada 330171-00-12-50-01-05 is a 3300 5 mm proximity probe configured for non-contact shaft measurement in rotating machinery. Designed around eddy-current sensing technology, it detects changes in the distance between the probe tip and a conductive target, allowing the associated monitoring system to capture both shaft position and dynamic vibration information.
This configuration features a 1/4-28 UNF thread, 1.2-inch overall case length, 5.0-meter total probe cable, and a miniature coaxial ClickLoc connector with connector protection. The longer 5-meter cable makes this version especially practical for machinery installations where the monitoring electronics are located some distance from the measurement point.
As part of a properly matched 3300 5 mm transducer system, the probe can support continuous monitoring of turbines, compressors, pumps, generators, and other critical rotating equipment. Its compact sensing head and extended cable configuration provide a useful combination of installation flexibility and dependable machinery-monitoring performance.
Technical Specifications
The 330171-00-12-50-01-05 belongs to the Bently Nevada 3300 5 mm probe family and uses a 1/4-28 UNF mounting thread without armor. The complete ordering code is important when selecting a replacement because the cable length, connector arrangement, case dimensions, and approval option are defined by the individual suffixes.
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model | 330171-00-12-50-01-05 |
| Product Type | 3300 5 mm Proximity Probe |
| Sensing Principle | Eddy-current, non-contact |
| Probe Size | 5 mm class |
| Thread | 1/4-28 UNF-2A |
| Unthreaded Length | 0.0 in |
| Overall Case Length | 1.2 in (30.5 mm) |
| Total Cable Length | 5.0 m (16.4 ft) |
| Connector | Miniature coaxial ClickLoc connector with connector protector |
| Cable Type | Standard 75 Ω triaxial probe cable |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 303/304 stainless steel |
| Probe Temperature Range | -35°C to +177°C (-31°F to +351°F) |
| Minimum Cable Bend Radius | 25.4 mm (1.0 in) |
| Recommended Probe Case Torque | 5.1 N·m (45 in-lb) |
| Maximum Probe Case Torque | 7.3 N·m (65 in-lb) |
| Probe Tensile Strength | 222 N (50 lbf), case-to-lead and lead-to-connector |
| Probe Weight | Approximately 323 g |
| Typical Complete System Weight | Approximately 0.71 kg, depending on system configuration |
| Approval Option | 05 — Multiple approvals |
Applications
Turbine Shaft Monitoring
Steam and gas turbines require dependable shaft displacement information to help identify abnormal rotor behavior. The 3300 5 mm probe can form part of a continuous vibration and position monitoring arrangement for these high-value machines.
Compressor Vibration Measurement
The 5-meter cable configuration is particularly useful on larger machinery where the sensing point and monitoring cabinet are separated by a greater distance. When correctly integrated with the compatible Proximitor and extension cable arrangement, it provides the measurement signal required for rotor monitoring.
Pump and Motor Condition Monitoring
The probe can be used on suitable pumps, motors, generators, and other rotating assets to monitor radial shaft movement and vibration. Continuous measurement can give maintenance personnel greater visibility into changing machine conditions.
Generator and Rotating Equipment Protection
In power-generation and process facilities, shaft displacement is an important parameter for detecting developing mechanical problems. A correctly installed proximity probe can provide essential input to a machinery protection system.
Keyphasor and Speed Measurement
The 3300 5 mm transducer system can also support suitable Keyphasor and speed measurement applications when the probe is installed and configured for the intended target and monitoring arrangement.
Advantages
Extended 5-Meter Reach
The defining advantage of this configuration is its 5.0-meter cable length. It gives engineers additional flexibility when the probe location is relatively far from the signal-conditioning equipment.
Non-Contact Sensing
The eddy-current operating principle measures shaft movement without requiring physical contact with the rotating surface. This makes the technology well suited to high-speed machinery where conventional contact measurement would be impractical.
Compact 5 mm Probe Construction
The small probe format allows installation in locations where a larger sensing device may be difficult to accommodate. Its 1/4-28 mounting configuration also provides a familiar mechanical interface for compatible installations.
Durable Materials
The probe case is constructed from AISI 303/304 stainless steel, while the probe tip uses PPS material. Together, these materials provide a robust package for demanding industrial machinery-monitoring environments.
Practical ClickLoc Connection
The miniature coaxial ClickLoc connector with connector protection offers a secure and service-friendly interface within compatible 3300 transducer installations.
Designed for Continuous Machinery Monitoring
When paired with the appropriate 3300 XL extension cable and Proximitor sensor, the probe can contribute to stable measurement of both static shaft position and dynamic vibration. This makes it valuable for predictive maintenance and machinery protection strategies.
Useful Replacement Configuration
Because the full ordering code identifies the exact cable and mechanical configuration, the 330171-00-12-50-01-05 is a practical choice when an existing installation specifically requires a 5-meter probe.
Technical FAQs
1. What is the Bently Nevada 330171-00-12-50-01-05?
It is a Bently Nevada 3300 series 5 mm proximity probe configured with a 1/4-28 UNF thread, 1.2-inch overall case length, 5.0-meter cable, ClickLoc connector with connector protection, and the 05 approval option.
2. How long is the probe cable?
The total probe cable length is 5.0 meters (16.4 feet).
3. What is the mounting thread?
This model uses a 1/4-28 UNF-2A mounting thread. The thread engagement must be kept within the specified installation limits.
4. What does the “50” in the part number represent?
The 50 identifies the 5.0-meter total length option for the probe cable.
5. What does the “01” connector code indicate?
The 01 configuration specifies a miniature coaxial ClickLoc connector with connector protection and standard cable.
6. What is the probe case length?
The overall case length is approximately 1.2 inches (30.5 mm).
7. What is the weight of this proximity probe?
The standard 3300 5 mm probe weighs approximately 323 g (11.39 oz). The weight of a complete transducer system will be higher because it also includes the appropriate extension cable and Proximitor sensor.
8. Can the 330171-00-12-50-01-05 measure shaft vibration?
Yes. When used within a compatible 3300 transducer system, the probe provides a signal proportional to the distance between its tip and the conductive target. This enables measurement of dynamic shaft vibration as well as static position.
9. What is the probe's temperature range?
The specified probe temperature range is -35°C to +177°C (-31°F to +351°F).
10. Is the 5-meter version interchangeable with shorter 3300 5 mm probes?
Not necessarily. Although the probes may share the same basic 5 mm sensing technology, the complete part number determines cable length, connector configuration, mechanical dimensions, and approval requirements. For replacement work, the full existing part number should be compared before installation.
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