BENTLY NEVADA 330104-00-08-05-01-05 Proximity Probe

The Bently Nevada 330104-00-08-05-01-05 is a high-precision, non-contacting eddy current proximity probe belonging to the industry-standard 3300 XL 8 mm Proximity Transducer System. This sensor is engineered to measure dynamic shaft vibration, axial position, eccentricity, and speed on critical rotating machinery such as steam turbines, centrifugal compressors, pumps, and electric motors.

Part Number Configuration Breakdown

The alphanumeric string maps out specific physical and mechanical dimensions required for targeted machine casings:

Hardware Specifications

Functional Design & Mechanical Advantage

• Eddy Current Principle: The probe tip contains an encapsulated precision coil. The matching Proximitor Sensor excites this coil with a radio frequency (RF) signal, projecting an electromagnetic field into the target area. As a conductive metal target (like a steel shaft) moves closer, it absorbs energy via eddy currents, altering the voltage output proportionally.
• ClickLoc Coaxial Connector: Features a gold-plated, fluid-resistant coaxial interlocking plug. The ClickLoc design locks securely against operational high-frequency vibration, preventing signal modulation or loss of contact.
• Inherent Isolation & Immunity: Mechanically isolated to eliminate ground loop current distortions. The specialized shielding protects against radio frequency interference (RFI) and electromagnetic interference (EMI), ensuring clean signal delivery without requiring solid conduits.

Field Installation & Calibration Guidelines

1. Mechanical Air Gap Setting: Thread the probe body into the machine housing casing using a feeder gauge or by monitoring the live DC voltage out of the Proximitor. A target gap of ~1.0 mm normally corresponds to a baseline mid-range value of -10.0 VDC.
2. Cross-Talk Minimization: When mounting multiple proximity probes adjacent to one another, maintain a clear linear spacing distance of at least 40 mm between probe tips to prevent overlapping electromagnetic fields from corrupting the measurement.
3. Target Material Consideration: The system is pre-calibrated from the factory for standard AISI 4140 steel targets. If the rotor shaft utilizes stainless steel or an alternate alloy, the scale factor must be recalibrated within the supervisory software loop.