The Bently Nevada 330102-00-20-05-02-00, also cataloged as the 330102 Proximity Probe, operates as a dedicated hardware component for rotor vibration and displacement monitoring within machinery protection systems.

Ordering Matrix & Configuration Suffixes

• Base Model: 330102
• Thread Configuration: 00 (3/8-24 UNF without armor)
• Overall Cable Length: 20 (2.0 meters)
• Connector Option: 05 (Miniature coaxial ClickLoc connector with connector protector)
• Agency Approval: 02 (Multiapproval option for hazardous locations)

Technical Specifications

Transducer Dynamics & Gap Voltage Validation

The 3300 XL eddy-current transducer system translates mechanical displacement of rotating machinery shafts into proportional electrical signals. Signal verification requires strict maintenance of the static gap voltage, targeting an operational baseline of -10 VDC when positioned at the center of the linear range. Eddy-current probe scaling is factory-calibrated to ensure signal linearity across varied metallurgical targets. Proper cross-talk suppression must be maintained by ensuring adequate physical separation between adjacent probe tips to prevent frequency beating and erroneous vibration readings.

Package Contents

• 1 x 3300 XL 8 mm Proximity Probe Tip with Integral Cable
• 1 x Miniature Coaxial ClickLoc Connector Protector
• 1 x Brass Mounting Nut (3/8-24 UNF thread)
• 1 x Insulating Sleeve

Physical Installation Protocol

• Ensure the target shaft surface is clean, free of metallurgical anomalies, and exhibits minimal mechanical runout prior to probe insertion.
• Maintain a minimum radial clearance of 50 mm from surrounding structural members to avoid parasitic eddy-current field distortion.
• Torque the mounting hardware using calibrated instruments to prevent thread deformation while securing mechanical stability against vibration.
• Route the integral coaxial cable away from high-voltage power conduits and variable frequency drives to mitigate electromagnetic interference.

Technical FAQ

• What is the nominal scale factor of this proximity probe system?
• The incremental scale factor is calibrated to 7.87 V/mm (200 mV/mil) when interfaced with a compatible 3300 XL Proximitor sensor.
• How is the initial static gap voltage adjusted during commissioning?
• The gap voltage must be adjusted to approximately -10 VDC using a digital multimeter connected to the Proximitor sensor COM and VT terminals.
• Can the integral coaxial cable length be modified in the field?
• No, field cutting or splicing of the coaxial cable alters the system capacitance and invalidates the factory calibration accuracy.
• What thread size does the 330102 probe utilize?
• The probe utilizes a 3/8-24 UNF standard mounting thread without stainless steel armor protection.
• What temperature range can the probe tip withstand continuously?
• The probe tip and cable assembly endure operational environments ranging from -35 deg C up to +177 deg C.
• Is grounding required for the coaxial shield?
• The shield must be grounded solely at the monitor rack or power supply end to prevent ground loops and signal corruption.
• What type of connector is attached to the probe lead?
• It features a miniature coaxial ClickLoc connector equipped with a protective environmental sleeve.
• What system monitors are compatible with this transducer?
• It interfaces directly with Bently Nevada 3500/42M and legacy 3300 monitoring systems designed for eddy-current inputs.