Bently Nevada 330101-00-55-10-02-05 3300 XL 8 mm Proximity Probe The Bently Nevada 330101-00-55-10-02-05, also cataloged as the 330101 proximity probe,...
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Description
Bently Nevada 330101-00-55-10-02-05 3300 XL 8 mm Proximity Probe
The Bently Nevada 330101-00-55-10-02-05, also cataloged as the 330101 proximity probe, operates as a dedicated hardware component for non-contact displacement measurement within the 3300 XL eddy-current transducer system. It outputs an analog voltage proportional to target distance via a calibrated linear range, directly interfacing with a compatible Proximitor sensor over a 75 ohm coaxial link.
8 mm dia. probe tip; 3/8-24 UNF thread; 139.7 mm case length
Operating Temp
-51 degC to +177 degC
Power Consumption
Supplied via Proximitor sensor; no independent power input
Target Material
AISI 4140 steel (calibration standard)
Linear Range
2.0 mm (80 mils), starting at 0.25 mm (10 mils) from probe tip
Scale Factor
7.87 V/mm ±5% (200 mV/mil ±5%)
Frequency Response
0 Hz (DC) to 10 kHz
Cable Type
75 ohm coaxial, minimum bend radius 25.4 mm
Connector
Gold-plated brass ClickLoc coaxial
Eddy-Current Probe Scaling and Gap Voltage Validation
Probe scaling follows the factory-defined 7.87 V/mm sensitivity, requiring verification against a known steel target to ensure compliance with the linear range envelope. Gap voltage validation targets -10 VDC nominal for AISI 4140 steel when operating in the calibrated region. System integration must account for cross-talk suppression by maintaining specified separation distances between adjacent probes to prevent inductive coupling effects.
Frequently Asked Questions
Q: Can the probe be replaced without recalibrating the system?
A: No. Any probe replacement requires gap voltage measurement and scaling verification using the same target material and Proximitor sensor combination.
Q: Is hot-swapping supported during machinery operation?
A: Hot-swapping is not supported. Disconnect power from the Proximitor sensor before connecting or disconnecting the probe to avoid transient surges.
Q: What is the effect of temperature on measurement accuracy?
A: Within the rated -51 degC to +177 degC range, thermal drift remains within the ±5% scale factor tolerance; outside this range, linearity cannot be guaranteed.
Field Installation Guidelines
Install the probe with its tip perpendicular to the target surface, ensuring a minimum clearance from other metallic structures to avoid field distortion. Secure the threaded barrel fully into the mounting bracket, engaging at least five threads for vibration resistance. Route the coaxial cable separately from high-voltage conductors, maintaining shield continuity to the connector backshell. Terminate the shield at the Proximitor sensor end only, leaving the probe-end shield floating to prevent ground loops. Verify gap voltage after installation and prior to energizing machinery.
