Configured for high-speed displacement measurement in rotating machinery, the Bently Nevada 330103-00-25-10-02-00 (330103-00-25-10-02-00 8 mm Proximity Probe) provides direct physical execution of eddy-current distance sensing within turbine monitoring (TSI) systems.

Suffix Breakdown & Model Matrix

The 330103-00-25-10-02-00 follows the standardized Bently Nevada 3300 XL naming convention:

• 330103: 8 mm probe with internal armor.

• 00: Unthreaded length (0 mm).

• 25: Case length (250 mm).

• 10: Total length (1.0 meter).

• 02: Connector type (connector without housing).

• 00: Agency approval (none required).

Hardware Specifications

Mechanical Monitoring Characteristics

The probe operates on the eddy-current principle, requiring precise probe scaling to maintain linear output over the intended range. Accurate gap voltage validation is a requirement for commissioning, with a target operational setpoint of -10 VDC to ensure the probe remains in the linear region of the transducer curve. The 3300 XL system incorporates effective cross-talk suppression, ensuring that adjacent probes in multi-channel configurations do not interfere with vibration data. These modules are used to monitor rotor dynamics, detect shaft centerline position, and identify radial vibration signatures in high-velocity industrial machinery.

Ordering info

• One (1) 330103-00-25-10-02-00 Proximity Probe.

• Protective tip cover.

• Installation and technical compliance documentation.

• Note: Extension cables and Proximitor sensors are sold separately and must be impedance-matched to the 3300 XL transducer system.

Field Installation Guidelines

• Mechanical Interface: Install the probe in a rigid, vibration-resistant bracket; ensure the probe tip is perpendicular to the shaft target area.

• Gap Setting: Use a depth micrometer to set the mechanical gap; confirm the Proximitor output voltage reaches the -10 VDC target.

• Cable Routing: Secure the armored coaxial lead away from high-current conductors and rotating components to prevent EMI and mechanical damage.

• Connection: Ensure coaxial connectors are clean and fully seated; use a straight-line force until the click-loc mechanism is engaged.

• Thread Management: Verify that jam nuts are secured to prevent movement due to machine vibration, without exceeding torque limits of the housing.

Frequently Asked Questions

• What is the nominal operating gap voltage for this model?

  The nominal operating gap is centered at -10 VDC, which corresponds to the mid-point of the linear sensing range for the 3300 XL 8 mm system.

• Can the internal armor be removed to increase flexibility?

  No. The armor is an integral part of the probe assembly, providing mechanical protection; removing it compromises the probe's integrity.

• What happens if the gap voltage drifts from -10 VDC?

  If the voltage drifts significantly, the probe may be approaching its non-linear sensing limits, which will degrade the accuracy of vibration data.

• Does this probe require a specific target material for calibration?

  The standard calibration is for 4140 steel. If the rotor shaft material differs, a scale factor adjustment or custom calibration curve is required.

• How is the 250 mm case length utilized?

  The 250 mm length allows for installation in deep-recessed mounting locations where shorter probes cannot reach the sensing target.

• Can I use this probe with an older 3300 series Proximitor?

  While the connector may be physically compatible, the 3300 XL system should be used as a matched set (Probe, Extension Cable, Proximitor) for guaranteed accuracy.

• How is a short circuit in the cable detected?

  A short circuit often presents as a fixed voltage (0 VDC) or a erratic signal drift that fails the diagnostic checks in the monitoring rack.

• What is the minimum bend radius for the cable?

  The armored cable is designed for durability, but it should not be bent sharper than its specified radius to avoid internal damage to the coaxial dielectric.