Configured for displacement and vibration monitoring in 3300 XL Machinery Protection Systems, the Bently Nevada 330101-00-50-20-02-CN (330101 Proximity Probe) provides direct physical/electrical execution. This transducer converts the variable gap between the probe tip and a conductive target into a proportional analog voltage signal. It is engineered to monitor shaft radial vibration, axial position, and rotor speed in fluid-film bearing machinery, maintaining high linearity and electromagnetic consistency within the 3300 XL transducer system architecture.

Suffix Breakdown & Model Matrix

• 330101: 3300 XL 8 mm Proximity Probe

• -00: Unthreaded length (0.0 in)

• -50: Overall case length (5.0 in)

• -20: Total system length (2.0 meters / 6.6 feet)

• -02: Connector (Miniature coaxial ClickLoc connector)

• -CN: Agency approval (CN/China specific regulatory compliance)

Hardware Specifications

Mechanical Monitoring & Eddy-Current Precision

The 3300 XL system requires precise eddy-current probe scaling to ensure measurement repeatability. To achieve accurate rotor dynamics data, operators must perform gap voltage validation, targeting -10 VDC at the mid-point of the linear operating range. This centering ensures the signal remains within the linear response envelope. Furthermore, installers must enforce cross-talk suppression by maintaining appropriate physical separation between adjacent probes. This prevents electromagnetic field coupling between sensors, which could otherwise manifest as ghost vibration signatures or false phase-angle readings in the monitoring system.

## Ordering info

• One (1) 330101-00-50-20-02-CN Proximity Probe

• Two (2) 3/8-24 UNF-2A locknuts

• One (1) silicone connector protector sleeve

• Compliance documentation and installation instructions

Field Installation Guidelines

• Engagement: Secure the probe in the mounting bracket with at least five (5) full thread turns to ensure structural stability.

• Gap Setting: Verify the mechanical gap with a feeler gauge to ensure the probe remains within the 2.0 mm (80 mils) linear range during operation.

• Grounding: Terminate the coaxial shield at the Proximitor terminal block; avoid grounding the probe body or cable shield at the machine end to prevent ground loops.

• Cable Routing: Secure the coaxial cable away from AC power lines or motor leads to prevent electromagnetic interference (EMI) from corrupting the high-frequency oscillation signal.

Delivery Information

• Delivery time: 2-7 days when payment finish.

• Shipped via DHL/FEDEX/UPS.

• Securely packed in anti-static industrial packaging to prevent impact damage.

Frequently Asked Questions

• Can I replace a standard 3300 probe with an XL version?

  Yes. 3300 XL components are backward compatible with standard 3300 series 5 mm and 8 mm transducer systems, ensuring seamless component interchangeability.

• Why must the system length be exactly 2.0 meters?

  The Proximitor is factory-tuned for a specific cable impedance. Changing the cable length shifts the circuit resonance, which invalidates the calibration.

• How does the probe handle high-vibration environments?

  The 3300 XL probe features a robust bond between the tip and body and is designed to withstand mechanical fatigue in high-vibration applications.

• Is the connector sensitive to moisture?

  Yes. Use the provided silicone sleeve to seal the ClickLoc connector, preventing oil or water ingress which can cause signal attenuation or NOT OK faults.

• How can I identify if the probe is damaged?

  Monitor the gap voltage at the Proximitor output; a reading near 0 VDC or -24 VDC indicates an open or shorted circuit, requiring probe inspection.

• Does the probe require bench calibration?

  No. The 3300 XL design supports total interchangeability, allowing probes to be swapped without requiring bench recalibration of the Proximitor.

• Can this probe be used for non-conductive targets?

  No. Eddy-current probes require a conductive surface to generate the electromagnetic field necessary for distance measurement.

• How far should the cable be from high-power leads?

  Maintain a minimum separation of 30 cm (12 inches) to prevent electromagnetic interference from inducing noise into the oscillation loop.