Bently Nevada 330101-04-30-05-01-05 3300 XL 8 mm Proximity Probe

Product information

The 3300 XL 8 mm Proximity Transducer System provides an output voltage that is directly proportional to the distance between the probe tip and the observed conductive surface and can measure both static (position) and dynamic (vibration) values. The system’s primary applications are vibration and position measurements on fluid-film bearing machines, as well as Keyphasor reference and speed measurements. The 3300 XL 8 mm system delivers the most advanced performance in our eddy current proximity transducer systems.

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12 months warranty for all products
Original and new packing
3-5 working days shipping
High efficiency application
Good quality with long life span

Frequently Asked Questions (FAQ)

Q: How do I adjust the physical thread insertion depth of the 330101-04-30-05-01-05 probe in the field?
A: Its effective thread length is 2.6 inches (3.0 minus 0.4). After installation and connection to the extension cable and preamplifier, the insertion depth is adjusted using the -9.0 Vdc gap voltage, by tightening the lock nut.

Q: Since the total cable length of 330101-04-30-05-01-05 is only 0.5 meters, what are the strict requirements when selecting an extension cable?
A: The preamplifier's total-length matching rules must be . For a standard 5-meter or 9-meter system, the 0.5-meter probe must be matched with a 4.5-meter or 8.5-meter extension cable, such as the Bentley 330130.

Q: What are the field hardware requirements for insulation when connecting the 330101-04-30-05-01-05 probe cable to the extension cable?
A: From the casing and metal supports, the coaxial connector must be isolated. Although "01" includes a protective sleeve, transparent heat-shrink tubing is recommended for enhanced insulation and moisture protection, preventing grounding and interference.

Q: How can I determine if the coil of the 330101-04-30-05-01-05 probe is burnt out or broken during field operation?
A: The probe can be checked by measuring DC resistance. After disconnecting the extension cable, measure between the center conductor and outer shield. For a 330101 probe with a 0.5-meter cable, resistance is typically 4.0–6.0 ohms. Infinity indicates an open circuit, while near 0 ohms indicates a short circuit.

Q: Can the 330101-04-30-05-01-05 used in high-speed steam turbines resist the erosion and penetration of high-pressure steam?
A: To high-pressure, high-humidity steam, it cannot be directly exposed. Unlike "11" FluidLoc, the "01" version uses a standard cable. If moisture penetrates the insulation, probe impedance may change, so a sealed cover such as the Bentley 10300 is recommended.

Application

Chemical Plants: Monitoring shaft vibration and axial displacement of large ethylene compressors and high-pressure cracked-gas compressors to prevent impeller-to-casing rub during high-speed operation.

Refineries: Widely installed on main air blowers and wet-gas compressors in fluid catalytic cracking units for dynamic vibration monitoring of fluid-film bearings operating continuously year-round.

Power Plants (Thermal / Nuclear): Installed on the bearings of large steam turbine-generator sets and large boiler feedwater pumps to provide Keyphasor speed measurement and bearing condition alarms.

Natural Gas Processing Plants: Serving as critical protection sensors for centrifugal natural gas export compressors to prevent severe machine vibration caused by flow-induced excitation.

Steel Mills (Iron & Steel Plants): Applied to heavy-duty, high-speed rotating equipment such as blast furnace blowers, large rolling mill drive bearings, and high-power dust collection fans for lifecycle health monitoring.

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