Description

Bently Nevada 330145-14 3300 XL 8 mm Eddy Current Proximity Probe

The Bently Nevada 330145-14, also cataloged as the 330145 3300 XL 8 mm Eddy Current 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	Bently Nevada 330145-14
Brand	Bently Nevada
Product Type	Eddy Current Proximity Probe
Series	3300 XL 8 mm Proximity Transducer System
Origin	USA
Weight	0.1kg
Dimensions	8 mm probe tip diameter; 1.4 m total probe length
Operating Temp	-51 deg C to +177 deg C
Power Consumption	Passive probe element; powered through connected Proximitor Sensor
Measurement Technology	Non-contact eddy current displacement sensing
Linear Measurement Range	2.0 mm (80 mils)
System Sensitivity	7.87 V/mm (200 mV/mil) with 3300 XL Proximitor Sensor
Target Material	AISI 4140 steel
Output Impedance	50 ohm
System Operating Voltage	-17.5 VDC to -26 VDC
Probe Tip Material	Polyphenylene sulfide (PPS)
Probe Case Material	AISI 303 or 304 stainless steel
Cable Insulation	Fluoroethylene propylene (FEP)
Connector Type	Miniature coaxial ClickLoc locking connector
Pressure Rating	Sealed up to 70 psi (4.8 bar)
Compliance	API 670 machinery protection requirements

Eddy-Current Measurement and Rotor Dynamics Characteristics

The 330145-14 uses eddy-current probe scaling to convert shaft displacement into proportional electrical output signals. Moreover, the probe works with the 3300 XL Proximitor Sensor to maintain a defined measurement relationship of 7.87 V/mm for vibration and position monitoring.

The probe assembly supports gap voltage validation procedures with typical -10 VDC target settings when technicians establish the operating clearance between the probe tip and the rotating shaft. Therefore, the system provides consistent reference conditions for rotor dynamics analysis, including radial vibration, axial position, and rotational behavior evaluation.

The probe construction also applies signal design practices that reduce measurement errors caused by installation effects and electrical interference. In addition, the coaxial ClickLoc connection maintains mechanical locking and signal continuity in industrial machinery monitoring installations.

Frequently Asked Questions

Q: Does the 330145-14 probe directly output a vibration signal?
A: No. The probe generates an eddy-current displacement signal that requires a compatible 3300 XL Proximitor Sensor to provide the conditioned output signal.

Q: What gap voltage should technicians verify during installation?
A: Technicians typically verify the probe operating gap near the -10 VDC target value when setting the mechanical clearance between the probe tip and shaft surface.

Q: Can the probe operate without a target shaft material specification?
A: No. The measurement calibration depends on the electrical characteristics of the target material. The standard target material is AISI 4140 steel.

Field Installation Guidelines

Install the 330145-14 probe with the sensing tip facing the monitored shaft surface according to the machinery manufacturer's mechanical drawings.

Maintain proper probe clearance and verify the gap voltage before commissioning the monitoring channel. Furthermore, route the extension cable away from high-current power conductors to minimize electromagnetic interference.

Connect the ClickLoc coaxial connector securely and confirm that the cable shielding and grounding follow the applicable machinery protection system installation requirements.

Avoid sharp cable bends, mechanical stress on the probe body, and contamination of the probe tip surface during installation.

Specifications

• Brand: Bently Nevada

Advantages

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