Introduction
The Bently Nevada 330171-00-12-10-02-05 is a 3300 5 mm proximity probe engineered for non-contact measurement of shaft position and dynamic vibration in rotating machinery. It is part of the 3300 proximity transducer family and is intended to work as part of a complete measurement system with the appropriate extension cable and Proximitor sensor.
This configuration uses a 1/4-28 UNF-2A thread, a 1.2-inch overall case length, a 1.0-meter total cable length, and a miniature coaxial ClickLoc connector with standard cable. The 05 ordering option indicates the multiple-approval configuration.
Unlike a conventional contact sensor, the 3300 5 mm probe uses eddy-current sensing to detect changes in the gap between the probe tip and a conductive target. This makes it particularly valuable for monitoring critical rotating equipment where even small changes in shaft behavior can provide an early indication of mechanical deterioration.
For plants maintaining turbines, compressors, pumps, generators, or other fluid-film-bearing machinery, the 330171-00-12-10-02-05 provides a compact and proven sensing option for continuous machinery condition monitoring.
Technical Specifications
The 330171-00-12-10-02-05 is a 5 mm probe with 1/4-28 UNF mounting, without armor. Its mechanical configuration is defined by the complete ordering number, so replacement should always be based on the full part number rather than the 330171 base designation alone.
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model | 330171-00-12-10-02-05 |
| Product Type | 3300 5 mm Proximity Probe |
| Measurement Principle | Eddy-current, non-contact sensing |
| Probe Series | 3300 5 mm |
| Thread | 1/4-28 UNF-2A |
| Unthreaded Length | 0.0 in |
| Overall Case Length | 1.2 in (30.5 mm) |
| Total Cable Length | 1.0 m (3.3 ft) |
| Connector | Miniature coaxial ClickLoc connector |
| Cable | Standard 75 Ω triaxial cable |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 303/304 stainless steel |
| Probe Tip Diameter | Approximately 5.2 mm |
| Typical System Sensitivity | Approximately 200 mV/mil, system dependent |
| Operating Temperature | Approximately -35°C to +177°C (-31°F to +350°F) |
| Probe Weight | Approximately 0.323 kg |
| Approval Option | 05 — Multiple approvals |
Applications
The 330171-00-12-10-02-05 is designed for applications in which shaft displacement and vibration need to be monitored continuously without physical contact.
Turbine Monitoring
Steam and gas turbines rely on accurate shaft measurements to identify abnormal vibration, rotor movement, and other developing mechanical conditions. The probe can form part of a machinery protection arrangement for these critical assets.
Compressor Condition Monitoring
High-speed compressors can be sensitive to rotor instability, shaft movement, and bearing-related problems. A properly configured proximity probe provides the raw displacement information required by the compatible monitoring system.
Pump and Motor Monitoring
The compact 5 mm sensing format can be applied to pumps, motors, generators, and other rotating equipment where radial shaft vibration or position measurement is required.
Keyphasor and Speed Applications
3300 series proximity probes can also be used in suitable keyphasor and speed measurement arrangements, depending on the overall transducer-system configuration.
Industrial Machinery Protection
For process plants and power-generation facilities, continuous proximity measurement can support condition-based maintenance by providing earlier visibility into changes in machine behavior.
Advantages
Precise Non-Contact Measurement
The eddy-current sensing principle allows the probe to measure shaft movement without mechanical contact. This eliminates physical wear between the sensor and the rotating target.
Compact 5 mm Format
The 5 mm probe design is useful where installation space is restricted or where a smaller sensing arrangement is preferred for the machinery geometry.
Robust Industrial Construction
The probe uses a stainless-steel case and PPS probe tip designed for demanding industrial applications. The 3300 probe construction also incorporates Bently Nevada's TipLoc molding approach for a robust probe-tip connection.
Reliable ClickLoc Connection
The miniature coaxial ClickLoc connector provides a practical connection method for compatible 3300 extension-cable and Proximitor arrangements.
Flexible Monitoring Capability
When correctly integrated into the complete 3300 transducer system, the probe can support both static shaft-position measurements and dynamic vibration measurements.
Well Suited to Critical Rotating Assets
For equipment where unexpected shutdowns can carry a significant operational cost, dependable shaft monitoring provides valuable information for maintenance decisions and machinery protection.
Exact Configuration for Replacement Work
The 330171-00-12-10-02-05 has a clearly defined combination of thread, case length, cable length, connector, and approval option. This makes the full part number particularly useful when maintaining an established installation and trying to avoid compatibility issues.
Technical FAQs
1. What is the Bently Nevada 330171-00-12-10-02-05?
It is a Bently Nevada 3300 series 5 mm proximity probe with a 1/4-28 UNF thread, 1.2-inch overall case length, 1.0-meter total cable length, miniature coaxial ClickLoc connector, and multiple-approval configuration.
2. What type of measurement does this probe provide?
It provides non-contact measurement of the position and dynamic movement of a conductive rotating target. In a suitable 3300 transducer system, this information can be used for shaft displacement and vibration monitoring.
3. Does the probe itself provide a 4-20 mA output?
No. The probe is a sensing element within a complete proximity transducer system. It should not be treated as a standalone 4-20 mA transmitter. Signal conditioning is provided by the compatible Proximitor and associated monitoring electronics.
4. What is the mounting thread?
The probe uses a 1/4-28 UNF-2A thread. This specification should be verified before installing it as a replacement.
5. How long is the cable?
The ordering configuration specifies a 1.0-meter (3.3-foot) total length.
6. What does the “02” suffix represent?
In this ordering configuration, 02 identifies the miniature coaxial ClickLoc connector with standard cable.
7. What does the final “05” indicate?
The 05 option identifies the multiple-approval configuration. Approval requirements should always be checked against the requirements of the specific installation.
8. What is the operating temperature range?
The 3300 5 mm probe is generally specified for approximately -35°C to +177°C (-31°F to +350°F), subject to the exact system and installation conditions.
9. How much does the 330171-00-12-10-02-05 weigh?
The probe weight is approximately 0.323 kg (323 g). Packaging and shipping weight may be higher.
10. What should be checked when replacing this probe?
Always compare the complete part number. In particular, verify the thread, unthreaded length, case length, total cable length, connector configuration, cable type, and approval option. Using a probe that looks similar but has a different ordering configuration can result in mechanical or system-level compatibility problems.
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