Configured for high-frequency rotor displacement measurement in industrial machinery, the Bently Nevada 330103-04-13-10-02-00 (330103 Proximity Probes) provides direct physical and electrical execution of eddy-current signal sensing within the 3300 XL transducer system.

Suffix Breakdown

The 330103-04-13-10-02-00 part number indicates the following hardware configuration:

• 04: Unthreaded length (40 mm).

• 13: Overall case length (130 mm).

• 10: Total length (1.0 meter).

• 02: Connector option (Miniature coaxial).

• 00: Agency approval (Standard).

Hardware Specifications

Mechanical Monitoring and Signal Dynamics

The 3300 XL transducer system employs precise eddy-current probe scaling to ensure linear voltage output proportional to shaft displacement. The system is calibrated to a nominal sensitivity of 7.87 V/mm (200 mV/mil). Accurate gap voltage validation is required during commissioning, with -10 VDC targets at the Proximitor output confirming the probe is centered within its linear range. Rotor dynamics analysis depends on maintaining impedance matching across the transducer loop. Cross-talk suppression is managed by strictly adhering to spatial separation requirements between adjacent probes, preventing interference from overlapping excitation fields.

Ordering Information

• 330103-04-13-10-02-00 Proximity Probe assembly

• Mounting locknut and flat washer

• Technical documentation packet

• Protective connector thread caps

Installation Guidelines

Mounting and Gapping

• Use a calibrated depth micrometer to set the gap. Verify that the DC output voltage reaches -10 VDC at the monitor terminal at the intended operating gap.

• Secure the locknut to the recommended torque specification to prevent signal drift caused by vibration or thermal expansion.

• Ensure the target shaft surface is free of non-conductive coatings or metallic debris that could induce signal errors.

Grounding and Routing

• Route the integral coaxial cable through grounded rigid metallic conduit to provide shielding against EMI.

• Terminate the probe shield at the single-point instrument ground in the cabinet to eliminate ground loops.

• Observe the minimum bend radius of 64 mm (2.5 inches) to preserve the internal dielectric and characteristic impedance.

Frequently Asked Questions

• Q: Is this probe compatible with older 3300 series Proximitor sensors?

• A: No. The 330103 series is designed specifically for 3300 XL electronics. Compatibility with legacy hardware will result in scaling inaccuracies.

• Q: Can the 1.0-meter integral cable be field-spliced?

• A: No. The cable is a precision-tuned component of the transducer loop. Modification will alter system impedance and invalidate calibration.

• Q: What are the primary symptoms of an improper gap setting?

• A: An improper gap can lead to signal clipping, non-linear output, or excessive noise, making the transducer unable to provide accurate rotor vibration data.

• Q: Is the probe tip material electrically conductive?

• A: No. The probe tip is made of polyphenylene sulfide (PPS), which is non-conductive, protecting the coil from mechanical wear and chemical exposure.

• Q: Can I use this probe on non-metallic shafts?

• A: No. The eddy-current principle requires a conductive target material to induce the signal field.

• Q: How often should the gap be verified?

• A: Verify the gap voltage during initial commissioning and at every major machine outage to ensure the transducer remains within the linear sensing range.

• Q: Should I apply thread sealant to the probe threads?

• A: Avoid thread sealants or PTFE tape, as these can impede the electrical ground path between the probe case and the machine chassis.

• Q: Is the connector assembly moisture-proof?

• A: No. The miniature coaxial connector is designed for dry, protected environments. Use a sealed junction box if the environment contains oil mist or moisture.