330709-000-050-10-02-00 | Bently Nevada | 3300 XL 11 mm Proximity Probes

Bently Nevada 330709-000-050-10-02-00 3300 XL 11 mm Proximity Probe

The Bently Nevada 330709-000-050-10-02-00, also cataloged as the 330709 11 mm Eddy Current Probe, operates as a dedicated hardware component for non-contact shaft position measurement and rotor dynamics evaluation within 3500 Machinery Protection Systems.

Suffix Breakdown & Model Matrix

• Base Model: 330709 (3300 XL 11 mm Proximity Probe, 3/8-24 UNF thread)
• Unthreaded Length Option (-000): 000 = 0 mm
• Overall Case Length Option (-050): 050 = 50 mm
• Total Length Option (-10): 10 = 1.0 meter (3.3 feet)
• Connector and Cable-Type Option (-02): 02 = Miniature coaxial ClickLoc connector, standard cable
• Agency Approval Option (-00): 00 = Not required

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The 330709-000-050-10-02-00 sensor utilizes high-frequency eddy-current probe scaling to monitor dynamic vibration and axial position of rotating machinery shafts. Paired with a matching 3300 XL 11 mm Proximitor Sensor, the assembly delivers a linear voltage output proportional to target distance. Proper gap voltage validation (targeting -10 VDC at the physical midpoint of the linear range) ensures optimal magnetic coupling and minimizes signal saturation during thermal expansion or severe shaft displacement. The coaxial cable construction and ClickLoc connector assembly provide cross-talk suppression and maintain signal isolation in high-EMI turbomachinery enclosures.

Frequently Asked Questions

Q: What gap voltage target is used during mechanical installation of the 330709-000-050-10-02-00 probe?

A: Adjust the probe insertion distance until the Proximitor Sensor output reads -10 VDC, corresponding to the center of the 4.0 mm (160 mils) linear operating range.

Q: Can the ClickLoc coaxial connector be disconnected while power is applied to the monitoring system?

A: Cable disconnection should only occur after power is removed or the area is confirmed non-hazardous to avoid signal faults and prevent tripping connected plant protection loops.

Field Installation Guidelines

• Verify that the machine mounting port threads match 3/8-24 UNF and are free of physical debris.
• Thread the probe case into the bearing housing while monitoring DC voltage output across the Proximitor terminals until achieving the target -10 VDC gap setting.
• Lock the probe position by torquing the mounting locknut against the machine casing to standard mechanical limits.
• Connect the miniature coaxial ClickLoc connector to the extension cable jack, ensuring the internal detent mechanism clicks firmly into place.
• Secure cable runs with support clips to protect coaxial lines from mechanical abrasion and prevent sharp bend radii.