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Bently Nevada 330140-XX-XX-10-02-05 3300 XL 8 mm Smooth Case Proximity Probe

The Bently Nevada 330140-XX-XX-10-02-05, also cataloged as the 330140 3300 XL 8 mm Smooth Case Proximity Probe, operates as a dedicated hardware component for shaft displacement and vibration measurement within the 3300 XL Proximity Transducer System.

Hardware Specifications

Parameter	Specification
Model	330140-XX-XX-10-02-05
Brand	Bently Nevada
Product Type	3300 XL 8 mm Smooth Case Proximity Probe
Origin	USA
Operating Temp	-52 deg C to +177 deg C
Power Consumption	Passive probe device; power supplied by compatible Proximitor Sensor
Measurement Principle	Eddy-current non-contact displacement measurement
Probe Configuration	Smooth case, non-armored design
Linear Range	2.0 mm (80 mils)
Starting Gap	0.25 mm (10 mils)
Scale Factor (ISF)	7.87 V/mm (200 mV/mil) +/- 5%
Deviation from Best Fit Straight Line	Less than +/- 25.4 um (+/- 1.0 mil)
Frequency Response	0 to 10 kHz (+0, -3 dB)
Output Signal	DC voltage proportional to probe target distance
Probe Tip Material	Polyphenylene sulfide (PPS)
Probe Case Material	AISI 303 or 304 Stainless Steel
Cable Type	75 ohm triaxial FEP insulated cable
Connector Type	Gold-plated brass ClickLoc coaxial connector
Tensile Strength	330 N (75 lbf) probe case to probe lead
Hazardous Area Approval	CSA, ATEX, IECEx multiple approvals
Environmental Protection	TipLoc molding for oil and fluid ingress protection

Eddy-Current Measurement and Rotor Dynamics Characteristics

The 330140 series probe uses an eddy-current measurement circuit to detect shaft position changes without physical contact. The probe generates a proportional electrical output when connected to a compatible Proximitor Sensor. Therefore, the system can capture both static shaft position and dynamic vibration movement.

Bently Nevada proximity systems validate mechanical shaft movement through calibrated probe scaling. The 7.87 V/mm (200 mV/mil) scale factor allows the monitoring system to convert displacement variations into vibration amplitude data. Additionally, the probe supports rotor dynamics analysis by providing continuous radial displacement feedback from rotating machine shafts.

The smooth case construction allows axial adjustment through clamp-style mounting brackets. As a result, engineers can position the probe accurately in installations where threaded mounting arrangements are not practical.

Frequently Asked Questions

Q: Does the 330140-XX-XX-10-02-05 probe operate independently without a Proximitor Sensor?
A: No. The probe requires a compatible Bently Nevada Proximitor Sensor to provide excitation and convert eddy-current signals into usable voltage output.

Q: What is the purpose of the smooth case mechanical design?
A: The smooth case allows axial adjustment through external clamp mounting methods. It is used where fixed threaded probe installation is unsuitable.

Q: How is probe installation gap verified during commissioning?
A: Technicians verify the electrical gap voltage through the connected Proximitor Sensor. Bently Nevada systems commonly use a -10 VDC gap target for correct probe operating position validation.

Field Installation Guidelines

Install the 330140 probe using a rigid clamp mounting structure to prevent mechanical movement during machine operation. Maintain proper probe alignment with the shaft target surface before final tightening.

Route the 75 ohm triaxial cable away from high-current power conductors to reduce electrical interference. Connect cable shielding according to the monitoring system grounding requirements and avoid unnecessary shield loops.

During commissioning, verify the probe gap voltage through the Proximitor Sensor output. Confirm that the measured voltage remains within the approved operating range before enabling vibration monitoring functions.

Protect the ClickLoc coaxial connector from contamination and mechanical stress. Ensure the cable bend radius follows standard instrumentation installation practices to prevent signal degradation.

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