Bently Nevada 330851-02-000-060-50-00-CN 3300 XL 25 mm Proximity Probe

Configured for non-contact displacement measurement in TSI platforms, the Bently Nevada 330851-02-000-060-50-00-CN (330851 Proximity Probe) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

• 330851: 3300 XL 25 mm Proximity Probe base model.
• 02: M30 x 2 thread probe case type.
• 000: 0 mm unthreaded length.
• 060: 60 mm overall case length.
• 50: 5.0 meter total system length.
• 00: No armor configuration.
• CN: Country-specific agency approval.

Hardware Specifications

Mechanical Monitoring and TSI Characteristics

The 330851 probe system employs eddy-current probe scaling to map target displacement to a proportional voltage. Precise installation requires gap voltage validation, where the system is adjusted to a -10 VDC target within the linear range of the Proximitor. Because this probe detects minute variations in rotor dynamics, cross-talk suppression is achieved by maintaining specified physical clearances from adjacent probes, preventing interference from overlapping electromagnetic fields. The 12 kHz frequency response ensures high-fidelity acquisition of shaft vibration and position data.

Frequently Asked Questions

Q: Can the 5.0 meter system length be trimmed to match a shorter installation run?

A: No. The transducer system is calibrated as a matched set, including the probe, cable, and Proximitor. Modifying the cable length alters the electrical impedance, which degrades the frequency response and linearity.

Q: Is the probe housing compatible with high-humidity environments?

A: Yes. The probe is constructed from stainless steel and features an IP67 ingress protection rating, allowing it to withstand environments with up to 98% relative humidity.

Field Installation Guidelines

• Mounting: Secure the probe using the M30 x 2 threads. Ensure the lock nut is tightened firmly against the bracket to prevent mechanical shifting due to equipment vibration.
• Gap Setting: Use a feeler gauge or the Proximitor output voltage to set the probe gap. Monitor the Proximitor output during adjustment to confirm the -10 VDC setpoint is maintained at the operational position.
• Cable Integrity: Observe a minimum bend radius of 25.4 mm (1.0 in) for the Teflon-insulated cable. Secure the cable with non-metallic clamps to mitigate fatigue from vibration.
• Grounding: Establish a clean electrical connection between the probe body and the machine housing to serve as a stable ground reference for the transducer system.