Configured for displacement and vibration measurements in machinery protection systems, the Bently Nevada 330103-02-10-05-01-05 (330103 Proximity Probe) provides direct physical/electrical execution. This non-contacting sensor transduces the dynamic distance between the probe tip and the observed conductive target into an electrical signal managed by a 3300 XL Proximitor Sensor. The hardware functions as the primary sensing interface for monitoring rotor dynamics, including radial vibration and axial position, within industrial monitoring frameworks.

Part Number Variable Matrix

• 330103: 3300 XL 8 mm Proximity Probe, M10 x 1 thread, without armor.

• 02: Unthreaded length option (0.2 in).

• 10: Overall case length option (1.0 in).

• 05: Total length option (0.5 m / 1.6 ft).

• 01: Connector and cable option (Miniature coaxial ClickLoc connector).

• 05: Agency approval option (Multiple thread-type approvals).

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The 8 mm eddy-current probe system is calibrated for AISI 4140 steel targets to maintain linearity. Operational verification requires gap voltage validation (-10 VDC targets) at the Proximitor output to ensure the sensor is centered within its linear range. Precise rotor dynamics analysis depends on this calibration accuracy. Cross-talk suppression is achieved by observing minimum spacing between adjacent sensors, preventing interference of the high-frequency magnetic fields used to measure shaft displacement.

Ordering Information

• 1 330103-02-10-05-01-05 Proximity Probe with 0.5 m integrated coaxial cable

• 2 M10 x 1 Hex Jam Nuts

• 1 ClickLoc Connector Protective Cap

• 1 Installation Technical Manual

Field Installation Guidelines

• Probe Threading and Torque

• Install the sensor into the mounting bracket using a minimum of 5 full threads of engagement to maintain structural stability.

• Tighten the hex jam nuts to a maximum of 5.1 N-m (45 in-lb) to prevent housing deformation.

• Cable Routing and Protection

• Enforce a minimum bend radius of 25.4 mm (1.0 in) for the coaxial cable to prevent internal conductor damage.

• Route probe leads through grounded metal conduits, physically isolated from power or high-voltage lines to prevent EMI injection.

Frequently Asked Questions

• What is the target gap voltage for system calibration?

  The probe must be physically positioned until the connected Proximitor sensor output reads -10 VDC, representing the center of the 80 mil linear range.

• Can this probe be connected directly to a PLC analog input?

  No, a 3300 XL Proximitor is required to perform RF modulation and demodulation to provide a usable voltage output.

• Is the 0.5 m cable length adjustable?

  No, the cable length is calibrated as part of the system impedance. Cutting or splicing will degrade the scale factor and system accuracy.

• What target material is required for standard operation?

  The factory calibration is specific to AISI 4140 steel. Other target materials will require a non-linear calibration or system recalibration.

• Is the probe connection hot-swappable?

  Yes, the coaxial interface is hot-swappable while powered, though it will trigger a channel fault alarm on the monitor.

• Does the probe include armor protection?

  No, this model uses the standard unarmored coaxial cable configuration.

• What is the impact of moisture on the ClickLoc connector?

  Moisture ingress increases leakage resistance, which skews the gap voltage. Use the provided protective cap or silicone tape in humid environments.

• How are orthogonal (X-Y) probes prevented from interfering?

  Cross-talk suppression relies on maintaining the recommended separation distance between probe tips to ensure independent measurement of vibration planes.