Bently Nevada 3300/20-05-03-01-00-00 3300 XL 8mm Probe – Eddy Current Vibration Sensor

Brand Bently Nevada

Model Bently 3300/20-05-03-01-00-00 3300

Product Overview

The Bently Nevada 3300/20-05-03-01-00-00 is an 8mm eddy current proximity probe from the 3300 XL series, the most advanced eddy current proximity transducer system offered by Bently Nevada. This 3300/20-05-03-01-00-00 probe is designed to measure the relative motion between a conductive target—typically a rotating shaft—and the probe tip, providing precise data on shaft vibration, axial position, and radial displacement. The probe operates on the eddy current principle: a high-frequency signal in the probe coil generates an electromagnetic field, and when a conductive target enters this field, eddy currents are induced that alter the coil impedance. The associated Proximitor sensor converts this impedance change into a DC voltage proportional to the gap between the probe tip and the target surface .

As a component of the 3300 XL 8mm transducer system, the 3300/20-05-03-01-00-00 functions in conjunction with a 3300 XL extension cable and a 3300 XL Proximitor sensor. This three-part architecture provides complete interchangeability, meaning probes, cables, and Proximitor sensors can be mixed and matched without the need for matched-set calibration or bench calibration. The standard 3300 XL 8mm 5-metre system complies with API 670 Standard requirements for mechanical configuration, linear range, accuracy, and temperature stability, making the 3300/20-05-03-01-00-00 suitable for critical turbomachinery applications where measurement integrity directly affects machine protection decisions .

The 3300/20-05-03-01-00-00 is backward compatible with non-XL 3300 series 5mm and 8mm transducer system components, allowing phased upgrades of existing monitoring installations without replacing the entire measurement chain. Its primary applications include radial shaft vibration and axial position measurement on fluid-film bearing machines, as well as Keyphasor reference and speed measurement .

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	3300/20-05-03-01-00-00
Manufacturer	Bently Nevada / Baker Hughes
Product Series	3300 XL
Product Type	8mm Eddy Current Proximity Probe
Probe Diameter	8mm
Linear Measurement Range	2mm (80 mil)
Scale Factor	7.87 V/mm (200 mV/mil)
Frequency Response	0 to 10 kHz
Accuracy	±0.25% of full scale
Probe Tip Material	Polyphenylene Sulfide (PPS)
Probe Case Material	AISI 303/304 Stainless Steel
Cable Insulation	Fluoroethylene Propylene (FEP)
Operating Temperature	-51°C to +177°C
Protection Rating	IP67
Connection Type	Miniature Coaxial ClickLoc
System Length	5 metres (standard)
Compliance	API 670 (4th Edition)
Interchangeability	Complete (probe, cable, Proximitor)

Main Features and Advantages

Complete System Interchangeability: The 3300/20-05-03-01-00-00 is designed for full interchangeability with matching 3300 XL extension cables and Proximitor sensors. Unlike older proximity systems that required matched-set calibration, the 3300/20-05-03-01-00-00 can be replaced in the field without bench calibration, significantly reducing maintenance downtime and eliminating the need to maintain calibrated spare sets. This interchangeability also extends backward to non-XL 3300 series components, providing flexibility during phased system upgrades .

Robust Eddy Current Technology: The 3300/20-05-03-01-00-00 utilizes non-contact eddy current sensing, which eliminates mechanical wear on the probe and target surface. The probe tip is constructed from polyphenylene sulfide, a material selected for its thermal stability and resistance to wear, while the stainless steel case provides mechanical protection in high-vibration environments. The fully welded probe housing and armored cable options protect against mechanical damage and electrical noise, ensuring reliable performance in the harsh conditions found near turbine bearings and compressor frames .

High-Frequency Response for Diagnostic Capability: With frequency response from DC to 10 kHz, the 3300/20-05-03-01-00-00 captures both static (position) and dynamic (vibration) data across the full spectrum relevant to rotating machinery diagnostics. This capability enables detection of bearing defects, gear mesh frequencies, rubs, and other high-frequency vibration phenomena that would be missed by lower-bandwidth sensors. The probe’s ceramic tip and robust construction maintain measurement accuracy even during transient events and high-vibration operating conditions .

ClickLoc Connector Design: The 3300/20-05-03-01-00-00 features Bently Nevada’s ClickLoc miniature coaxial connector, which provides a secure, tool-free connection between the probe and extension cable. The connector design ensures proper mating and resists loosening under vibration, addressing a common failure mode in proximity probe installations where connector back-out can cause intermittent signals. FluidLoc cable options are available to prevent oil migration through the cable in lubricated bearing applications .