Description

The Bently Nevada 330101-00-18-10-02-05 is a high-performance 8 mm proximity probe engineered as a fundamental sensor for the 3300 XL 8 mm Proximity Transducer System. This specific unarmored configuration features a standard 3/8-24 UNF thread with a fully threaded body (0.0 inches unthreaded length) and a total case length of 1.8 inches. Designed without outer physical armor, this variant offers maximum flexibility for FEP-insulated coaxial cable routing through internal machine conduits. It features a 1.0-meter (3.3-foot) total cable length terminated with a gold-plated miniature coaxial ClickLoc connector (without connector protector), optimized for non-contacting shaft vibration and position measurements. Possessing CSA, ATEX, and IECEx agency approvals, this probe is fully certified for use in hazardous, classified industrial locations.

Operating on eddy-current technology, the probe generates a high-frequency radio frequency (RF) field from its polyphenylene sulfide (PPS) tip. When placed near a metallic target (typically AISI 4140 steel), it measures dynamic or static displacement with exceptional accuracy and interchangeability. The probe case is constructed from high-grade AISI 303/304 stainless steel and features a built-in Viton O-ring seal to prevent process media or oils from leaking through the machine casing. It functions seamlessly within standard 3300 XL monitoring systems, pairing with a 3300 XL Proximitor sensor (such as the 330180 series) and standard extension cables to deliver continuous condition monitoring on turbines, compressors, gearboxes, and pumps.

Features

• High-accuracy 8 mm tip diameter probe designed for non-contacting eddy-current displacement measurement.
• Completely threaded stainless steel case (0.0 inches unthreaded length) with a 1.8-inch overall case length for precise mechanical installation.
• Standard FEP-insulated 75 Ohm triaxial cable measuring 1.0 meter (3.3 feet) with a miniature ClickLoc connector.
• Unarmored cable construction allows tight bend radiuses and clean routing within compact industrial enclosures.
• Integrated Viton O-ring providing a high-integrity differential pressure seal between the probe tip and case.
• Direct electrical and physical interchangeability with standard Bently Nevada 3300-series 5 mm and 8 mm components.

Applications

• Continuous radial vibration and dynamic shaft displacement monitoring on steam and gas turbines.
• Axial thrust position and casing displacement measurement in high-speed centrifugal compressors and process pumps.
• Phase reference and speed sensing (Keyphasor) on industrial motors, fans, and utility gearboxes.
• Machinery protection systems in oil and gas, petrochemical, power generation, and water management operations.

Ordering Information

Technical Specifications

Installation Guidelines

• Clean the threaded mounting bracket and align the probe carefully before gapping to prevent cross-threading the stainless steel casing.
• Always set the probe gap during installation using a digital multimeter connected to the Proximitor sensor output to achieve the standard -10.0 Vdc calibration voltage (corresponding to a 1.27 mm or 50 mil gap).
• Ensure the unarmored triaxial cable is routed with a minimum bend radius of 25.4 mm (1.0 inch) to prevent structural damage or signal loss.
• Apply proper instrumentation grounding and shielding protocols to prevent external electromagnetic interference from affecting the vibration signals.
• Avoid exposing the probe pressure seal to temperatures below -34 degC (-30 degF) to prevent premature sealing degradation or failure.

Compliance and Certifications

• CSA: Class I, Division 1, Groups A, B, C, and D; Class I, Zone 0/1/2, Groups IIC, IIB, IIA (when used with appropriate barriers)
• ATEX: II 1 G Ex ia IIC T5...T1 Ga (for intrinsically safe installations)
• IECEx: Ex ia IIC T5...T1 Ga; Ex ia IIIC T90degC...T280degC Dc
• CE Compliant