The Bently Nevada 330101 3300 XL 8 mm Proximity Probe is designed to measure both static (position) and dynamic (vibration) parameters of rotating machinery. It outputs a voltage proportional to the distance between the probe tip and the target surface, and is ideal for fluid-film bearing machines, keyphasor reference, and speed measurements. The probe system offers full API 670 compliance and interchangeable components for simplified maintenance.

Applications

• Vibration and position monitoring in turbines, compressors, pumps

• Shaft displacement and axial position measurement

• Keyphasor phase reference signal

• Overspeed protection systems

Advantages

• Fully meets API 670 standard for critical machinery

• Backward and forward compatibility with non-XL components

• Improved RFI/EMI immunity and robust mechanical design

• Easy installation with ClickLoc connectors, no special tools required

• Optional extended temperature range for harsh environments

Technical Specifications

FAQ

Q1: What is the main function of this probe?

A1: It measures shaft vibration and position by detecting the distance between probe tip and conductive surface.

Q2: Is this probe compatible with older 3300 series systems?

A2: Yes, it is backward compatible and fully interchangeable with non-XL 3300 8 mm and 5 mm components.

Q3: Does it require field calibration?

A3: No, components are factory-calibrated and fully interchangeable without bench calibration.

Q4: Can it be used in high-temperature environments?

A4: Yes, with optional ETR version, it withstands up to 218°C at the probe tip.

Q5: What is the recommended gap voltage setting?

A5: Approximately -9 VDC for radial vibration, which equals about 1.27 mm gap.

Q6: What materials are used for the probe tip and body?

A6: Tip: PPS (polyphenylene sulfide), Body: stainless steel.

Q7: What is the minimum shaft diameter for proper operation?

A7: Recommended minimum shaft diameter is 76.2 mm to minimize cross-talk and maintain accuracy.

Q8: Does it comply with hazardous area certifications?

A8: Yes, it has CSA, ATEX, and IECEx approvals for use in hazardous areas.

Q9: Are connector protectors included?

A9: Optional connector protectors can be ordered; recommended for environments with oil and dust exposure.

Q10: How is it installed?

A10: It is installed in threaded mounting holes with recommended torque values, no special tools are required for connectors.