330707-00-20-10-12-00 | Bently Nevada 3300 XL 11 mm Proximity Probes

The 330707-00-20-10-12-00 is an 11 mm outer diameter eddy current proximity probe from the Bently Nevada 3300 XL series. Designed for non-contact condition monitoring of rotating machinery, it serves as a core sensing component for equipment health diagnostics. Using the eddy current effect, it converts shaft clearance variations (such as radial vibration, axial displacement, and key phase position) into a linear voltage signal. When combined with the 3300 XL Proximitor Sensor and extension cable, it forms a complete monitoring system, providing high-precision data support for critical rotating equipment such as turbines, compressors, and pumps.

Manufacturer: Bently Nevada
Product Numbers: 330707-00-20-10-12-00
Product Type: 3300 XL 11 mm Proximity Probes
Country of origin: USA
Warranty: 1 Year
Condition: 100% Original
Product Configuration
Part Number-AA-BB-CC-DD-EE
A: Unthreaded Length Option : 00 - 0 inch
B: Overall Case Length Option : 20 - 2.0 inch
C: Total Length Option : 10 - 1.0 meter (3.3 feet)
D: Connector and Cable-Type Option : 12 - Miniature coaxial ClickLoc connector, FluidLoc cable
E: Agency Approval Option : 00 - Not required

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• Installation Preparation: Confirm that the probe model and system length (probe + extension cable) match the requirements of the proximitor sensor. Prepare a torque wrench (recommended torque 15-18 N·m), a dial indicator, a mounting bracket, and an explosion-proof sealed connector (for use in hazardous areas).
  
• Positioning: Mark the mounting holes in the X/Y directions of the bearing housing. Ensure that the probe axis is perpendicular to the measured shaft surface (deviation ≤ 2°). Set the initial clearance to the midpoint of the linear range (2.5 mm) to avoid exceeding the measurement range and causing signal nonlinearity.
• Mechanical Fixing: Thread the probe into the mounting base, controlling the tightening force with a torque wrench (to avoid thread damage). After installation, use a dial indicator to check that the probe radial runout is ≤ 0.02 mm to ensure a stable measurement reference.
• System Connections: Connect the probe cable and extension cable via a dedicated explosion-proof connector (sealed for hazardous areas). Connect the other end of the extension cable to the "PROBE" port on the 3300 XL proximitor sensor. The output of the proximitor sensor is connected to the 3500 monitor. Calibration verification: Use the TK-3E calibrator to simulate a gap change of 0-5 mm, record the output voltage, and confirm that the sensitivity deviation is ≤±0.1 V/mm. After 1 hour of power operation, recheck that the zero drift is ≤0.03 V.

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