Configured for high-precision rotor vibration and position measurement, the Bently Nevada 330104-00-08-05-01-05 (330104-00-08-05-01-05 8 mm Proximity Probes) provides direct physical execution of eddy-current displacement sensing within turbine monitoring (TSI) systems, specifically designed for internal armor protection.

Suffix Breakdown & Model Matrix

The 330104-00-08-05-01-05 adheres to the Bently Nevada 3300 XL 8 mm system nomenclature:

• 330104: 8 mm probe with internal armor.

• 00: Unthreaded length (0 mm).

• 08: Overall case length (80 mm).

• 05: Total length (0.5 meters).

• 01: Connector type (Miniature coaxial connector).

• 05: Agency approval (CSA/NRTL/C).

Hardware Specifications

Eddy-Current Probe and TSI Characteristics

This transducer system operates on the eddy-current principle, requiring precise probe scaling to maintain linear output over the measurement range. Proper gap voltage validation is a mandatory commissioning step; the target operational setpoint is -10 VDC to ensure the probe remains in the linear region of the transducer curve. The 3300 XL system incorporates internal cross-talk suppression, ensuring that adjacent probes in high-density rack configurations do not interfere with vibration data. The internal armor provides mechanical integrity in environments where cables are susceptible to debris or physical impact, making this probe assembly suitable for monitoring rotor dynamics, shaft centerline position, and radial vibration in demanding industrial machinery.

Ordering info

• One (1) 330104-00-08-05-01-05 Proximity Probe.

• Protective tip cover.

• Technical compliance documentation (CSA/NRTL/C certified).

• Note: Extension cables and Proximitor sensors are sold separately and must be compatible with the 3300 XL 8 mm system impedance.

Field Installation Guidelines

• Mechanical Alignment: Ensure the probe is mounted perpendicularly to the target shaft; use a rigid bracket to prevent mechanical resonance and bias.

• Gap Setting: Establish the mechanical gap using a depth micrometer; verify the output voltage at the Proximitor terminal block (Target: -10 VDC).

• Cabling: Route the armored coaxial lead through dedicated conduit or cable trays; maintain separation from high-voltage lines to prevent induced noise.

• Connector Engagement: Ensure miniature coaxial connectors are clean and fully seated; apply a straight-line force until the connector clicks to confirm electrical continuity.

• Thread Management: Apply torque to mounting jam nuts to secure the probe position, ensuring that vibration does not cause the gap to drift during machine operation.

Frequently Asked Questions

• What is the purpose of the internal armor on this probe?

  The internal armor protects the coaxial cable from physical damage, abrasions, or debris in industrial environments, ensuring signal integrity.

• Does this probe require a matched extension cable?

  Yes. The 3300 XL system is calibrated as a set (Probe + Extension Cable + Proximitor); replacing components requires verifying system-wide calibration.

• Can I use this probe in a hazardous area?

  The "05" suffix indicates CSA/NRTL/C agency approval, making it suitable for specified hazardous locations; verify local certification requirements before installation.

• How is signal integrity maintained over the 0.5 meter lead length?

  The cable uses high-quality shielding and impedance-controlled geometry to minimize signal attenuation and RFI interference.

• What is the target gap voltage for this model?

  The target gap voltage is -10 VDC, which positions the probe in the center of its linear range for optimal vibration measurement accuracy.

• Can the probe tip be repaired if damaged?

  No. The probe tip is permanently sealed; any physical damage to the tip or body requires replacing the entire probe assembly.

• Is the probe affected by target material variations?

  Yes. The transducer is calibrated for 4140 steel. If the target material differs, a scale factor adjustment or custom calibration is required to prevent measurement errors.

• How is a damaged cable identified by the TSI system?

  Damage typically results in a "Gap Error" signal on the monitor, caused by open or short circuits that drive the voltage outside the -10 VDC nominal target.