330195-02-12-05-00 | Bently Nevada | 3300 XL 8 mm Proximity Probe

Configured for displacement measurement in rotating machinery, the Bently Nevada 330195-02-12-05-00 (330195-02-12-05-00 Proximity Probe) provides direct physical signal transduction for vibration and position monitoring in reverse-mount orientations.

Suffix Breakdown & Model Matrix

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The 330195-02-12-05-00 transducer utilizes the eddy-current principle for displacement sensing, requiring a calibrated scale factor of 7.87 V/mm (200 mV/mil). During system commissioning, gap voltage validation against the -10 VDC target midpoint is mandatory to ensure linear operation. Precise gap setting is necessary for monitoring rotor dynamics, including shaft centerline positioning and orbital motion. In reverse-mount configurations, spatial clearance must be maintained to ensure effective cross-talk suppression between adjacent probe tips, preventing signal modulation from nearby electromagnetic fields.

Frequently Asked Questions

Q: Is the 0.5 metre total system length field-adjustable?

A: No. The 330195 system is factory-calibrated as a matched assembly consisting of the probe, integral cable, and Proximitor sensor. Field-modifying the cable length alters the electrical impedance and resonant frequency, which will introduce significant measurement inaccuracies.

Q: Is the probe tip pressure-tested for process sealing?

A: No. While the probe utilizes a Viton O-ring for differential pressure sealing between the tip and case, standard units are not pressure-tested prior to shipment. Verification of sealing integrity per specific application pressure requirements must be performed by the end-user or via a custom test request.

Field Installation Guidelines

• Mounting: Secure the probe in a rigid, non-conductive bracket. Verify that the probe tip is perpendicular to the shaft surface to prevent measurement skew in reverse-mount applications.
• Grounding: The probe housing is electrically conductive; verify the mounting bracket is bonded to the machine ground to maintain electromagnetic compatibility (EMC).
• Connector Integrity: Use the ClickLoc connector mechanism for all coupling points. Clean mating surfaces with an approved electrical contact cleaner before assembly to prevent signal attenuation.
• Cable Routing: Route the coaxial cable through a dedicated metallic conduit, maintaining physical separation from high-voltage AC lines to prevent induced noise on the output signal.