330703-000-050-10-01-00 3300 XL 11 mm Proximity Probe | Bently Nevada

Configured for non-contact vibration and shaft position sensing, the Bently Nevada 330703-000-050-10-02-00 (330703 11 mm Proximity Probe) provides direct physical execution of displacement measurement within the 3300 XL transducer platform. This hardware component translates axial or radial target displacement into a proportional voltage signal, functioning as the primary sensing element for high-frequency rotor dynamics monitoring.

Suffix Breakdown & Model Matrix

Hardware Specifications

Eddy-Current Probe Scaling and Gap Voltage Validation

The 3300 XL 11 mm system is calibrated to a linear scale factor of 7.87 V/mm (200 mV/mil). Accurate rotor dynamics analysis depends on maintaining a stable gap voltage; during commissioning, the output at the Proximitor sensor must be validated to a -10 VDC target when the probe is at the linear center of its range. Significant deviations from this value indicate potential signal attenuation or improper probe-to-target alignment. To ensure effective cross-talk suppression, all transducer signal cabling must be routed within grounded metallic conduits, physically isolated from high-voltage AC lines or variable frequency drive (VFD) output circuits to prevent the induction of electromagnetic noise.

Frequently Asked Questions

Q: Is the 330703 11 mm probe electrically interchangeable with 8 mm probes?

A: No. The Proximitor sensor is factory-calibrated for the specific tip diameter and coil geometry of the 11 mm probe. Using an 11 mm probe with an 8 mm Proximitor sensor results in an incorrect scale factor and non-linear output.

Q: What is the purpose of the integrated connector protector?

A: The connector protector provides environmental sealing at the miniature coaxial ClickLoc interface. It prevents moisture ingress and conductive debris from causing signal drift or intermittent electrical contact in industrial environments.

Field Installation Guidelines

• Mounting: Thread the probe into the mounting bracket until the required gap is achieved, then secure it using the locking nut. Ensure the M14 x 1.5 threads are clean and free of debris to prevent binding.
• Shielding: Maintain shield continuity through the coaxial connectors. The shield must be grounded at the Proximitor sensor terminal block only to prevent ground loops.
• Connector Integrity: Inspect the ClickLoc connector for any signs of oxidation before mating. Ensure the audible "click" is heard during engagement, indicating the connector is fully seated.
• Routing: Do not exceed the minimum static bend radius of 25.4 mm (1.0 inch). Avoid applying tensile force to the coaxial cable during installation, as this can deform the internal conductor and alter the characteristic impedance.