The Bently Nevada 330104-00-11-05-02-00 represents the industry standard in high-performance eddy current sensing technology. As a core component of the 3300 XL 8mm Proximity Transducer System, this probe monitors microscopic shaft movements in critical rotating machinery, including steam turbines, centrifugal compressors, and large-scale pumps. By converting the gap between the probe tip and the target surface into a proportional voltage signal, the sensor provides non-contact measurement of both static displacement (position) and dynamic vibration.
Engineered for the most demanding Turbine Supervisory Instrumentation (TSI) applications, this probe captures early indicators of mechanical stress—such as shaft unbalance, misalignment, or bearing wear—without physical contact. This zero-wear monitoring approach ensures decades of reliable service in power generation, oil and gas, and heavy manufacturing sectors. Its precision enables maintenance teams to move beyond reactive repairs into the realm of advanced predictive maintenance, safeguarding high-value assets against unplanned downtime.
The model 330104-00-11-05-02-00 follows a modular engineering logic where each segment defines a critical mechanical or electrical attribute:
The 00 indicates a 0.0-inch unthreaded length. This configuration provides a fully threaded body (3/8-24 UNF), allowing for maximum installation stability and flexibility when mounting through thick brackets or machine casings.
This designates a 1.1-inch overall case length. The compact 330104 housing facilitates installation in tight internal clearances where space between the mounting port and the target shaft is restricted.
The -05 specifies a 0.5-meter (1.6 feet) total probe lead length. In the 3300 XL system, the probe lead, extension cable, and Proximitor must match the total system calibration (typically 5.0m or 9.0m) to maintain the precise 200 mV/mil scale factor.
The 02 option provides a miniature coaxial ClickLoc connector with a connector protector to prevent fluid ingress. The 00 indicates standard global agency approvals, certifying the unit for safe operation in hazardous industrial environments.
| Feature | Specification Details |
| Probe Tip Diameter | 8.0 mm (0.315 in) |
| Linear Range | 2.0 mm (80 mils) |
| Nominal Sensitivity (ISF) | 7.87 V/mm (200 mV/mil) |
| Target Material | AISI 4140 Steel (Standard Calibration) |
| Operating Temperature | -51 °C to +177 °C (-60 °F to +351 °F) |
| Thread Size | 3/8-24 UNF-2A |
| Pressure Rating | Sealing up to 70 psi (4.8 bar) |
| System Compatibility | 3300 XL 5m and 9m Systems |
Achieving laboratory-grade precision in an industrial environment requires strict adherence to Bently Nevada's mechanical and electrical standards:
The system requires a precise "Static Gap" setting using a Digital Multimeter (DMM). For a 3300 XL 8mm system, the center of the linear range corresponds to -10.0 VDC. Rotate the probe within its mounting until the Proximitor output reaches this value, ensuring the shaft is at its rest position before tightening the locknuts.
Coaxial leads are sensitive to physical deformation and electrical noise. Maintain a minimum bend radius of 25.4 mm (1.0 inch). Protect the cable using flexible conduit to prevent mechanical damage and avoid running probe leads parallel to high-voltage AC lines to prevent EMI from corrupting the vibration signal.
Always utilize the provided ClickLoc connector protectors. Moisture or oil ingress into the coaxial connection remains the leading cause of "signal drift." Ensure the connectors are finger-tight and dry before sliding the protector sleeve over the junction.
High-Performance PPS Tip: The probe tip utilizes Polyphenylene Sulfide (PPS), a high-performance thermoplastic that resists chemical corrosion and maintains structural integrity across extreme thermal cycles.
TSI Seamless Integration: This probe communicates natively with Bently Nevada 3500 series monitors, ensuring immediate data visualization in System 1 software without complex recalibration.
Gold-Plated ClickLoc Connectors: Gold-plated contacts ensure a low-resistance connection and prevent oxidation, a critical feature for coastal or high-humidity offshore environments.
Interchangeable Design: The 3300 XL system allows for 100% interchangeability between probes, extension cables, and Proximitor sensors of the same electrical length, significantly reducing spare parts inventory.
Q1: How do I verify if the 330104-00-11-05-02-00 is functioning correctly?
A1: Measure the DC resistance between the center pin and the outer shield of the ClickLoc connector. A healthy 0.5m probe lead typically reads between 4.0 Ω and 8.0 Ω. An infinite reading indicates an open circuit, while a near-zero reading suggests a short.
Q2: Does this probe connect directly to an Ethernet router?
A2: No. This is a common error found in logistics databases. The 330104 is a passive analog eddy-current sensor. It provides a raw signal to a Proximitor Sensor, which then interfaces with a 3500 Rack. Digital network communication only occurs at the monitor or rack level.
Q3: Can I cut the probe cable to a shorter length?
A3: Never cut or splice the probe lead. The electrical length is factory-calibrated. Altering the cable length will change the system impedance, destroying the 200 mV/mil scale factor and making vibration readings inaccurate.
Q4: Is the 330104 compatible with older 3300 series components?
A4: Yes. The 3300 XL series maintains backward compatibility with legacy 3300 series 8mm components. However, for maximum accuracy and EMI protection, we recommend using a complete 3300 XL transducer system.
