Bently Nevada 330101-00-50-10-02-00 3300 XL 8 mm Proximity Probe

Description

Specifically designed for industrial rotating machinery protection, the Bently Nevada 330101-00-50-10-02-00 is an unarmored, 3/8-24 UNF threaded 8 mm proximity probe belonging to the highly reliable 3300 XL Proximity Transducer System. This specific configuration is defined by a 0.0-inch unthreaded length, a 5.0-inch overall case length, a 1.0-meter (3.3 feet) total cable length, a standard miniature coaxial ClickLoc connector, and no agency approval requirements. By avoiding protective armor and utilizing standard cabling, this variant offers a streamlined, highly precise solution for installations inside clean, conduit-routed machine casings where mechanical wear on the cable is not an immediate hazard.

Operating on the eddy-current principle, this non-contact sensor continuously measures the gap between the probe tip and the target shaft to monitor radial vibration, axial position, and rotor displacement. It outputs a highly linear signal with a nominal incremental scale factor of 7.87 V/mm (200 mV/mil) when integrated into a standard 3300 XL Proximitor monitoring loop. This probe is ruggedly constructed to withstand aggressive machine environments, ensuring critical turbomachinery such as steam turbines, gas turbines, compressors, and high-speed pumps remain fully protected against mechanical failure.

Features

• Standard 8 mm tip diameter optimized for precision non-contact displacement and vibration measurements.
• Fully threaded 3/8-24 UNF stainless steel case with 0.0-inch unthreaded length, allowing maximum adjustment range within standard mounting brackets.
• Integrated 1.0-meter (3.3 feet) standard coaxial cable terminated with a gold-plated miniature ClickLoc connector.
• Unarmored configuration designed to minimize cable weight and outer diameter, ideal for installations with dedicated electrical conduit routing.
• High-strength polyphenylene sulfide (PPS) probe tip ensures maximum resistance to corrosive bearing lubricants and high-pressure fluids.
• Full physical and electrical interchangeability with other non-XL 3300 system components.

Applications

The probe is deployed across heavy industrial power generation, oil and gas, and petrochemical operations. Common applications include:

• Radial vibration monitoring of steam and gas turbine bearings.
• Rotor shaft axial displacement and thrust position measurements.
• Rotor dynamics analysis and thermal growth diagnostics in high-speed centrifugal compressors.
• Continuous protective monitoring of critical process pumps and gearboxes.

Ordering Information

Technical Specifications

Installation Guidelines

Adhering to proper engineering practices ensures stable measurements and extends the service life of your proximity probe system:

• Probe Gap: Adjust the physical position of the probe to achieve a target gap of approximately 1.27 mm (50 mils) which corresponds to -9 Vdc output under standard calibration with a 3300 XL Proximitor sensor.
• Thread Engagement: Limit thread engagement to a maximum of 0.563 inches to prevent binding or physical damage to the threads.
• Torque Limits: Tighten the probe case to a recommended torque of 7.5 Nm (66 in-lbf). Do not exceed the maximum rated torque limit of 22.6 Nm (200 in-lbf).
• Cable Protection: Route the coaxial cable keeping to a minimum bend radius of 25.4 mm (1.0 inch). It is highly recommended to run unarmored cables within metal conduits or protected wireways to insulate against electromagnetic interference (EMI) and mechanical damage.