Configured for non-contacting displacement measurement in rotating machinery monitoring systems, the Bently Nevada 330101-24-35-10-02-00 (330101 Proximity Probe) provides direct physical signal generation based on shaft surface proximity to the transducer tip.

Suffix Breakdown & Model Matrix

• 330101: 3300 XL 8 mm Proximity Probe, 3/8-24 thread, without armor.

• 24: Unthreaded Length Option (24 mm).

• 35: Total Case Length Option (35 mm).

• 10: Total Length Option (1.0 meter).

• 02: Agency Approval Option (Multiple approvals: CSA, ATEX, IECEx).

• 00: Internal Mounting Thread/Connection Style (Standard mount).

Hardware Specifications

Mechanical Monitoring and TSI Integration

The 3300 XL system utilizes precise eddy-current probe scaling to ensure linear voltage output corresponding to target displacement. Successful deployment requires gap voltage validation, where the operational gap is typically adjusted to reach a -10 VDC setpoint to maintain linearity within the 2 mm transducer range. Rotor dynamics monitoring depends on the phase-coherent signal transmission through the coaxial cable to the Proximitor sensor. Furthermore, cross-talk suppression is maintained through high-frequency shielding, preventing interference when multiple probes are installed in confined machine housing.

Ordering Information

• 1 x 330101-24-35-10-02-00 Proximity Probe

• 1 x Threaded locknut with safety wire holes

• 1 x Connector protector

Field Installation Guidelines

• Probe Mounting: Thread the probe into the mounting bracket; ensure at least 5 threads of engagement if using NPT adapters or standard 3/8-24 jam nut security.

• Gap Setting: Adjust the probe to a gap resulting in -10 VDC output at the nominal shaft position.

• Signal Path: Ensure the coaxial extension cable is routed away from high-voltage lines or power cables to prevent induced noise.

• Connector Integrity: Always install the provided connector protector to prevent oil or debris ingress, which can alter electrical impedance.

Frequently Asked Questions

• What is the nominal scale factor of this probe?

  The nominal scale factor for the 3300 XL 8 mm system is 7.87 V/mm (200 mV/mil).

• Can this probe be used in hazardous environments?

  Yes, the 02 suffix indicates it is rated for use in hazardous areas, provided it is connected to a certified intrinsic safety barrier.

• What does the 24 mm unthreaded length signify?

  It represents the length of the probe case that does not feature external threads, typically used for specific mounting depth requirements in machinery.

• Is the probe compatible with 3500 series monitors?

  This probe is compatible with the 3300 XL Proximitor; the output from the Proximitor is then processed by the 3500 series vibration monitoring cards.

• How do I verify signal integrity?

  Perform a static gap test by measuring the voltage between the center conductor and the shield at the Proximitor terminal block.

• Can the cable be trimmed to fit a specific distance?

  No. The system is factory-calibrated for a 1.0 meter total length; cutting the cable will alter the system impedance and signal linearity.

• What material should the target be?

  The system is calibrated for AISI 4140 steel; other materials may require a recalibration factor to ensure measurement accuracy.

• How do I identify if the probe is functioning?

  A healthy probe will exhibit a specific capacitance and resistance; use a multimeter to ensure no short or open circuits exist between the center conductor and the case.