Description

The Bently Nevada 330105-02-12-10-02-00, also cataloged as the 330105 3300 XL 8mm Reverse Mount Proximity Probe, operates as a dedicated hardware component for non-contacting shaft displacement and vibration measurements within a Bently Nevada 3300 or 3300 XL Proximitor Sensor loop. Configured specifically for rear-mounting inside housing installations, the device tracks physical gaps between the probe tip and target conductive surfaces.

Hardware Specifications

Machinery Monitoring and TSI Characteristics

The 330105-02-12-10-02-00 utilizes eddy-current probe scaling to establish a linear voltage relationship relative to target distance, typically calibrated to 7.87 V/mm (200 mV/mil) when paired with AISI 4140 steel. During field calibration, gap voltage validation targets a nominal -10 VDC output at the center of the linear range, corresponding to an approximate 1.0 mm physical gap. This precise baseline allows the transducer system to monitor high-frequency rotor dynamics with absolute fidelity, capturing precise metrics for fluid-film bearing oil whirl, shaft whip, and synchronous unbalance without mechanical contact.

Frequently Asked Questions

Q: What scenario requires a reverse mount probe variant over a standard proximity probe? A: Reverse mount options are utilized when the probe must be threaded from the inside of a machine housing or internal bracket outward, or when used within a sleeve arrangement where access to the external casing thread is constrained.

Q: How does the ClickLoc connector mechanism maintain contact under severe machine casing vibration? A: The gold-plated brass ClickLoc coaxial connector features a positive mechanical locking sleeve that clicks into position when fully engaged, preventing accidental loosening or disruption caused by dynamic machine vibration.

Field Installation Guidelines

• Mechanical Gapping: Rotate the reverse mount probe inside its internal holder while checking the DC bias voltage at the Proximitor output terminal. Stop rotation once the multimeter reads exactly -10.0 VDC, indicating the nominal physical gap is achieved.
• Torque Limits: Tighten the 3/8-24 UNF jam nuts to a maximum torque specification of 11.2 N-m (100 in-lb) to prevent stripping or crushing the internal threaded barrel.
• Coaxial Protection: Wrap the ClickLoc connector interface with self-fusing silicone tape or utilize the integrated connector protector sleeve to completely seal the junction against oil and moisture.