The Bently Nevada 330703-000-050-50-02-00, also cataloged as the 330703 3300 XL 11 mm Proximity Probe, operates as a dedicated eddy-current displacement sensing component for shaft position measurement within the Bently Nevada 3300 XL Transducer System.

Configuration Identification

The 330703-000-050-50-02-00 configuration defines a Bently Nevada 3300 XL 11 mm probe assembly with M14 x 1.5 mounting thread, 50 mm case length, 5.0 meter total cable length, and miniature coaxial ClickLoc connector.

The probe provides a 3.94 V/mm (100 mV/mil) output response and is designed for non-contact measurement of shaft displacement using eddy-current sensing technology.

Hardware Specifications

Eddy-Current Measurement Characteristics

The 3300 XL 11 mm Proximity Probe operates as part of a complete eddy-current transducer system consisting of a probe, extension cable, and Proximitor Sensor.

The system converts shaft movement into an electrical voltage proportional to the distance between the probe tip and the conductive target surface. Proper probe gap adjustment is required to maintain measurement accuracy within the linear operating region.

For rotor dynamics applications, installation geometry must consider probe spacing and shaft diameter requirements. A minimum shaft diameter of 152 mm (6.0 in) is recommended when multiple probes are installed to reduce potential cross-talk effects between sensing channels.

The 3300 XL 11 mm system uses gap voltage validation principles, where approximately -10 VDC probe gap conditions represent the standard target region for Proximitor Sensor operation.

Ordering Information

The delivered configuration includes:

• 1 x Bently Nevada 330703-000-050-50-02-00 3300 XL 11 mm Proximity Probe
• 1 x Integrated 5.0 meter standard cable assembly
• 1 x Miniature coaxial ClickLoc connector
• 1 x Probe mounting thread assembly

Required system components:

• 1 x Compatible Bently Nevada Proximitor Sensor
• 1 x Compatible monitoring input channel within 3300 or 3500 monitoring systems

Mechanical Installation Guidelines

Probe Mounting

• Install the probe using the M14 x 1.5 metric mounting thread.
• Use the supplied locknut configuration where applicable to prevent loosening caused by machinery vibration.
• Maintain proper mechanical clearance between probe tip and rotating shaft surface.

Probe Gap Adjustment

• Adjust the probe gap according to the transducer system calibration requirements.
• A typical operating gap target is approximately 2.5 mm (100 mils) for a 4 mm linear range.
• Verify electrical output after mechanical positioning.

Cable Routing

• Keep probe cable routing separated from high-current power cables.
• Avoid sharp bending points and mechanical stress on the coaxial cable.
• Maintain proper shielding practices for low-level displacement signal integrity.

Frequently Asked Questions

• What measurement principle does the 330703 probe use?

  The probe uses eddy-current sensing to measure shaft displacement without physical contact between the probe tip and the rotating target.

• Is the 330703-000-050-50-02-00 a complete monitoring system?

  No. It is a probe component requiring a compatible extension cable interface and Proximitor Sensor.

• What is the thread specification of this probe?

  The probe uses an M14 x 1.5 metric mounting thread for mechanical installation.

• What cable length is supplied with this configuration?

  This model configuration includes a total cable length of 5.0 meters (16.4 feet).

• Can this probe directly connect to a PLC analog input?

  No. The probe requires a compatible Bently Nevada Proximitor Sensor to convert the eddy-current signal into an electrical output.

• What is the recommended probe gap range?

  The typical installation target is approximately 2.5 mm gap to position the system within its linear measurement range.

• Does the probe include an armored cable option?

  No. The 330703-000-050-50-02-00 configuration is specified without armor.

• How can cross-talk between multiple probes be reduced?

  Proper probe spacing and sufficient shaft diameter help reduce cross-talk effects in multi-probe rotor monitoring installations.