The Bently Nevada 330104-00-05-50-02-00 stands as the industry benchmark for non-contact displacement sensing within the 3300 XL 8mm Proximity Transducer System. This precision-engineered probe captures critical shaft vibration, position, and speed data from high-speed rotating assets such as steam turbines, centrifugal compressors, and motors. By utilizing eddy current technology, the sensor monitors mechanical health without physical contact, ensuring zero wear and high-fidelity signal transmission.
Designed to operate in the harshest industrial climates, this probe serves as the primary "eyes and ears" for Turbine Supervisory Instrumentation (TSI). It tracks microscopic movements of the target shaft—detecting imbalances, misalignments, or bearing wear before they escalate into catastrophic failures. Its seamless integration with the Bently Nevada 3500 monitoring rack provides maintenance teams with the actionable intelligence required for sophisticated predictive maintenance strategies.
The model 330104-00-05-50-02-00 follows a specific engineering logic where each segment defines its physical and electrical compatibility:
This indicates a 0.0-inch unthreaded length. This configuration is typically chosen for applications requiring full threading into the mounting bracket or machine housing for maximum stability.
The probe features a 0.5-inch total case length. This compact design suits tight mounting environments where space between the machine casing and the target shaft is limited.
The -50 designates a 5.0-meter (approx. 16.4 feet) total system length. The probe, extension cable, and Proximitor must all share this 5.0m calibration to ensure signal linearity and measurement accuracy.
The -02 option includes a miniature coaxial connector with a connector protector to prevent moisture ingress. The -00 indicates standard global agency approvals, certifying the unit for use 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 | 7.87 V/mm (200 mV/mil) |
| Target Material | AISI 4140 Steel (Standard) |
| Operating Temperature | -51 °C to +177 °C (-60 °F to +351 °F) |
| Pressure Rating | Sealing up to 70 psi (4.8 bar) |
| Total System Length | 5.0 Meters |
| Enclosure Rating | IP68 (when used with connector protectors) |
Precision in installation directly dictates the reliability of your vibration data. Follow these professional engineering practices for the 330104 series:
Set the initial probe gap using a calibrated Digital Multimeter (DMM). For a 3300 XL 8mm system, the center of the linear range typically corresponds to -10.0 VDC. Adjust the probe position until the Proximitor output hits this value, ensuring the shaft is at its rest position.
The coaxial cable is sensitive to physical deformation. Maintain a minimum bend radius of 25.4 mm (1.0 inch). Use conduit or cable trays to protect the lead from mechanical damage and avoid running probe leads parallel to high-voltage AC lines to minimize electromagnetic interference.
Always utilize the provided connector protectors. Moisture or oil contamination within the coaxial connection will cause "signal drift" or "false trips." Ensure the connectors are finger-tight before applying the protector sleeve.
High-Performance PPS Tip: The probe tip utilizes Polyphenylene Sulfide (PPS), a high-performance thermoplastic that resists chemical corrosion and withstands extreme thermal cycling.
TSI Seamless Integration: This probe is fully compatible with the 3500/40M and 3500/42M monitors, allowing for immediate data visualization within the System 1 software ecosystem.
Gold-Plated Connectors: The use of gold-plated ClickLoc connectors ensures low-resistance contact and prevents oxidation in humid offshore or coastal environments.
Interchangeability: The 3300 XL system allows for 100% interchangeability between probes, extension cables, and Proximitors of the same electrical length, simplifying spare parts inventory.
Q1: Can I use this 5.0m probe with a 9.0m extension cable?
A1: No. The total electrical length must remain consistent. A 5.0m probe (like the 330104-XX-XX-50-XX-XX) must be paired with a 5.0m system Proximitor and appropriate extension cables to reach the calibrated 5.0m total length. Mismatching will cause significant measurement errors.
Q2: How do I identify if the probe is damaged?
A2: Measure the resistance between the center conductor and the outer shield of the connector. A typical 3300 XL 8mm probe should show a DC resistance between 4.0Ω and 8.0Ω (depending on cable length). A reading of 0Ω (short) or infinity (open) indicates a failed probe.
Q3: Does this probe connect to an Ethernet router for data transmission?
A3: No. The 330104 probe provides a raw analog eddy current signal. It must connect to a Bently Nevada Proximitor Sensor, which converts the signal for a 3500 Monitoring Rack or PLC. It does not possess direct Ethernet or network capabilities.
Q4: Is this probe suitable for underwater applications?
A4: While the probe is rated IP68 and can withstand high humidity and splashing, it is not designed for continuous deep-water submersion without additional specialized pressure-sealed housings.
