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Bently Nevada 330901-00-32-05-02-CN 3300 NSv Proximity Probe

The Bently Nevada 330901-00-32-05-02-CN, also cataloged as the 330901 3300 NSv Proximity Probe, operates as a dedicated eddy-current measurement component for shaft displacement and vibration monitoring within Bently Nevada proximity monitoring systems. It provides non-contact gap measurement through a 5 mm probe tip, integrated 0.5 m cable, and ClickLoc coaxial connection.

Hardware Specifications

Parameter	Specification
Model	330901-00-32-05-02-CN
Brand	Bently Nevada
Product Series	3300 NSv Proximity Probe
Product Type	Eddy-Current Proximity Sensors
Origin	USA
Dimensions	3.2 inch overall case length, 5 mm tip diameter
Operating Temp	-51 deg C to +177 deg C
Power Consumption	Supplied by 3300 XL NSv Proximitor sensor
Probe Thread Type	1/4-28 UNF-2A
Unthreaded Length	0.0 inch
Integral Cable Length	0.5 m
Connector Type	Miniature ClickLoc coaxial connector
Linear Range	1.5 mm (60 mils)
Average Scale Factor	7.87 V/mm (200 mV/mil)
Recommended Gap Setting	1.0 mm (40 mils)
Frequency Response	0 to 10 kHz (+/-3 dB)
Output Impedance	50 ohm
Probe DC Resistance	4.0 ohm +/- 0.5 ohm
Housing Material	AISI 303 or 304 Stainless Steel
Tip Material	Polyphenylene Sulfide (PPS)
Cable Construction	75 ohm coaxial cable with FEP insulation
Hazardous Area Approval	NEPSI China Ex approval

Eddy-Current Probe Scaling and Rotor Dynamics Measurement

The 330901-00-32-05-02-CN uses eddy-current probe scaling characteristics to convert shaft displacement into proportional electrical signals. The probe operates with a 3300 XL NSv Proximitor and maintains a 7.87 V/mm average scale factor across its measurement range.

Furthermore, the system supports rotor dynamics analysis by measuring dynamic radial vibration and static shaft position. The 1.5 mm linear range allows monitoring of mechanical movement through a stable electromagnetic sensing field.

The probe requires gap voltage validation during installation. Field technicians typically verify the operating gap near the -10 VDC target range at the Proximitor output to confirm correct probe positioning and signal conditioning.

The narrow side-view construction also reduces installation limitations in restricted mechanical locations while maintaining signal performance for small shaft targets.

Frequently Asked Questions

Q: What Proximitor module is required for the 330901-00-32-05-02-CN probe?
A: The probe operates with a compatible 3300 XL NSv Proximitor sensor that provides excitation power and converts the eddy-current signal into vibration and position outputs.

Q: Can this probe measure both vibration and shaft position?
A: Yes. The probe measures dynamic shaft displacement for vibration monitoring and static displacement for position measurement when configured with the appropriate monitoring system.

Q: What installation factors affect measurement accuracy?
A: Correct probe gap adjustment, proper thread engagement, cable routing, and shield grounding practices directly affect measurement stability and signal quality.

Field Installation Guidelines

• Install the probe using the specified 1/4-28 UNF mounting thread and maintain proper mechanical alignment with the monitored shaft surface.
• Adjust the probe gap according to the 3300 XL NSv system requirements and verify the gap voltage output before commissioning.
• Protect the ClickLoc coaxial connector from contamination, moisture, and mechanical stress during installation.
• Route the integral cable away from high-current conductors and strong electromagnetic interference sources.
• Connect cable shielding according to the monitoring system grounding design to reduce electrical noise.
• Avoid excessive bending or pulling force on the integral cable because mechanical stress can affect probe signal integrity.
• Confirm hazardous area installation requirements when applying the CN NEPSI approval option.

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