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Bently Nevada 330905-00-25-05-12-CN 3300 NSv Proximity Probe

The Bently Nevada 330905-00-25-05-12-CN, also cataloged as the 330905 3300 NSv Proximity Probe, operates as a dedicated hardware component for shaft displacement measurement within Bently Nevada 3300 XL NSv Transducer System platforms.

Hardware Specifications

Parameter	Specification
Model	330905-00-25-05-12-CN
Brand	Bently Nevada
Product Type	3300 NSv Proximity Probe
Origin	USA
Weight	0.05 kg
Dimensions	1.8 x 1.6 x 66 cm estimated shipping size
Power Consumption	Supplied through compatible Proximitor Sensor, not specified
Thread Type	M10 x 1 metric thread
Armor Configuration	Without armor
Unthreaded Length	0 mm
Overall Case Length	250 mm
Total Length	0.5 meter (20 in)
Connector Type	Miniature coaxial ClickLoc connector
Cable Type	FluidLoc cable
Agency Approval	Multiple Approval
Average Scale Factor	7.87 V/mm (200 mV/mil)
Measurement Principle	Eddy-current displacement sensing

Eddy-Current Probe Scaling and Rotor Dynamics

The 330905-00-25-05-12-CN uses an eddy-current measurement principle to convert shaft position changes into electrical displacement signals. Therefore, the probe provides a 7.87 V/mm (200 mV/mil) average scale factor for compatibility with the 3300 XL NSv Proximitor Sensor.

The compact M10 x 1 mechanical design supports installation where standard 3300 and 3300 XL 5 mm or 8 mm transducer systems cannot be installed. In addition, the probe geometry supports rotor dynamics monitoring applications by measuring radial vibration, axial position, and shaft movement characteristics.

The system configuration requires proper gap voltage validation during commissioning. Furthermore, Bently Nevada monitoring systems typically verify probe operating range through gap voltage measurements, including -10 VDC target reference conditions for correct eddy-current probe operation.

Frequently Asked Questions

Q: What monitoring system is compatible with the 330905-00-25-05-12-CN probe?
A: The probe operates as part of the 3300 XL NSv Transducer System and requires a compatible 3300 XL NSv Proximitor Sensor and extension cable configuration.

Q: Can this probe replace older 3300 RAM or 3000-series systems directly?
A: The 3300 XL NSv system can replace 3300 RAM and 3000-series or 7000-series 190 Transducer Systems. However, upgrades may require replacement of the probe, extension cable, and Proximitor Sensor depending on the original system configuration.

Q: Does the probe include armor protection?
A: No. The 330905-00-25-05-12-CN uses a non-armored construction with a FluidLoc cable and miniature coaxial ClickLoc connector.

Field Installation Guidelines

Install the 330905-00-25-05-12-CN probe with the specified M10 x 1 thread engagement and maintain correct mechanical alignment with the rotating target surface.

Route the probe cable away from high-current power conductors and electromagnetic interference sources. Use proper cable support to prevent mechanical stress at the connector interface.

Connect the cable shield according to the monitoring system grounding practice. Avoid grounding methods that create additional ground loops between the probe system and machinery monitoring equipment.

During commissioning, verify probe clearance, gap voltage, and signal response through the connected Proximitor Sensor. Confirm that the measured displacement signal remains within the expected operating range before enabling machine protection functions.

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