Description

Bently Nevada 330171-00-20-10-02-00 3300 5 mm Proximity Probe

The Bently Nevada 330171-00-20-10-02-00, also cataloged as the 330171 3300 5 mm Proximity Probe, operates as a dedicated hardware component for eddy-current displacement measurement and vibration monitoring within the 3300 Transducer System.

Hardware Specifications

Parameter	Specification
Model	330171-00-20-10-02-00
Brand	Bently Nevada
Product Type	3300 5 mm Proximity Probe
Origin	USA
Dimensions	Overall case length: 2.0 in; unthreaded length: 0.0 in
Operating Temp	-35 deg C to +177 deg C
Power Consumption	Passive probe element; powered by compatible Proximitor sensor
Measurement Technology	Eddy-current non-contact displacement sensing
Thread Type	1/4-28 UNF
Cable Length	1.0 meter (3.3 feet)
Cable Type	75 ohm triaxial FEP insulated standard cable without armor
Connector Type	Miniature coaxial ClickLoc connector
Probe Tip Material	Polyphenylene sulfide (PPS)
Probe Case Material	AISI 303 or 304 stainless steel
Linear Range	2.0 mm (80 mils)
Linear Range Position	Approximately 0.25 mm to 2.3 mm from target surface
Recommended Gap Setting	1.27 mm (50 mils)
Incremental Scale Factor	7.87 V/mm (200 mV/mil) +/-6.5% typical
Deviation from Best Fit Straight Line	Less than +/-0.038 mm (+/-1.5 mil) typical
Frequency Response	0 to 6.5 kHz (+0, -3 dB)
Case Torque	5.1 N m recommended; 7.3 N m maximum
Connector Configuration	Miniature coaxial ClickLoc connector, gold-plated brass/beryllium copper

Eddy-Current Measurement and Rotor Dynamics Characteristics

The 330171-00-20-10-02-00 probe uses eddy-current sensing principles to convert shaft displacement into electrical signals for machinery protection systems. The probe operates with a matched Proximitor sensor and extension cable configuration, which maintains system calibration without individual component adjustment.

Additionally, the probe provides stable eddy-current probe scaling through a defined incremental scale factor of 7.87 V/mm. Therefore, vibration amplitude, radial shaft movement, and axial position measurements can be processed by compatible 3300 monitoring modules.

The probe supports rotor dynamics analysis by providing displacement signals required for vibration phase, shaft position, and mechanical movement evaluation. Moreover, proper gap voltage validation remains necessary during commissioning, with Bently Nevada systems typically using -10 VDC target gap voltage for compatible proximity measurement circuits.

The probe design also minimizes signal interference through controlled cable construction and shielded triaxial wiring. Consequently, the measurement circuit maintains signal integrity in machinery monitoring installations.

Frequently Asked Questions

Q: Does the 330171-00-20-10-02-00 require individual calibration with the Proximitor sensor?
A: No. The 3300 5 mm transducer system uses interchangeable probe, cable, and Proximitor sensor components without individual calibration matching.

Q: What target material is used for the specified scale factor performance?
A: The stated incremental scale factor applies to a standard AISI 4140 steel target material.

Q: What installation parameter affects displacement measurement accuracy?
A: Correct probe gap adjustment and gap voltage verification directly affect measurement accuracy. The compatible system normally validates the operating gap near -10 VDC.

Field Installation Guidelines

Install the probe with the specified 1/4-28 UNF mounting thread and maintain proper mechanical alignment with the monitored shaft surface.

Verify the probe tip position before operation and adjust the installation gap according to the connected Proximitor sensor requirements. During commissioning, check the gap voltage output to confirm the probe operates inside the linear measurement range.

Route the 75 ohm triaxial cable away from high-current power conductors and variable frequency drive output cables to reduce electrical interference. Maintain proper connector protection because exposed ClickLoc connectors require suitable environmental protection.

Ensure the probe case contacts the machine mounting structure correctly when grounding requirements apply. Confirm cable routing, connector locking, and mechanical clearance before placing the machinery protection channel into service.

Specifications

• Brand: Bently Nevada

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems