Description

Configured for non-contact shaft vibration and displacement measurements in Machinery Protection Systems, the Bently Nevada 102044-00-28-10-02 (102044 Proximity Probe) provides direct physical/electrical execution. It operates by generating a high-frequency electromagnetic field that interacts with conductive metal targets. The sensor transfers dynamic and static gap voltages back to a pairing Proximitor sensor for modulation. The unit executes direct gap tracking without mechanical interface contact.

Suffix Breakdown & Model Matrix

• 102044: Base Part Number for 3300 XL 8 mm Proximity Probe (Reverse Mount).
• -00: Unthreaded Length option (0.0 in).
• -28: Overall Case Length option (2.8 in).
• -10: Total Length option (1.0 m / 3.3 ft).
• -02: Miniature coaxial ClickLoc connector, unarmored cable option.

Hardware Specifications

Eddy-Current Scaling and TSI Performance

The system applies eddy-current probe scaling to convert physical gap displacement into proportional voltage. The output registers a standard incremental scale factor of 7.87 V/mm (200 mV/mil) when targeting AISI 4140 steel. Proper loop operation requires gap voltage validation targeting a nominal -10 VDC within the center of the linear calibration envelope. This tight calibration alignment enables high-fidelity tracking of high-speed rotor dynamics. It suppresses sub-synchronous shaft whip, whirl, and unbalance harmonics. Furthermore, the internal coaxial design maximizes signal cross-talk suppression. It mitigates magnetic interference when multiple probes mount closely inside a single bearing housing.

Frequently Asked Questions

Q: Can this probe connect directly to a 3500/22M or 3500/42M monitor card without an intermediary device?

A: No. The probe requires a matching 3300 XL Proximitor Sensor to modulate the radio frequency signal. Direct connection to monitor modules will result in an open circuit fault.

Q: What are the installation constraints concerning the 1.0 m cable length?

A: The total length of the probe cable and any extension cable must equal exactly 5.0 m or 9.0 m to match the calibration of the Proximitor sensor. Mismatches degrade the accuracy of the scale factor.

Field Installation Guidelines

• Ensure a minimum of five full thread engagements when locking the reverse-mount body into position.
• Verify the electrical clearance around the 8 mm probe tip to prevent side-view editing errors. Maintain a minimum clear zone diameter of 3x the tip diameter from adjacent structural metals.
• Isolate the outer shield of the coaxial line from the machine housing. Only ground the shield at the terminal block inside the Proximitor sensor housing.
• Use standard calibrated click-type torque wrenches to seat the ClickLoc miniature coaxial connectors. Do not use pliers or unrated hand tools, as over-tightening crushes the internal Teflon dielectric insulation.