Description

The Bently Nevada 330101-00-30-20-12-05 is a high-performance 8 mm proximity probe belonging to the industry-standard 3300 XL Proximity Transducer System. This specific configuration is engineered with a 3.0-inch overall case length featuring a fully threaded 3/8-24 UNF case (0.0-inch unthreaded length) and is unarmored. It is integrated with a 2.0-meter (6.6 feet) total length cable featuring Bently Nevada's advanced FluidLoc design. This patented fluid-blocked cable option represents a key technical choice, preventing machine lubricants and process fluids from migrating through the internal coaxial structure of the cable to outer junctions, eliminating leakage risks in high-pressure or oil-flooded machinery casings.

This eddy-current sensor operates on the proximity measurement principle, facilitating non-contact, high-precision measurement of static and dynamic shaft movement. By pairing this probe with a compatible 3300 XL Proximitor Sensor (such as the 330180 series) and an extension cable, operators construct a complete machinery protection system. This model holds comprehensive international hazardous area certifications under the 05 Agency Approval option, ensuring compliance with CSA, ATEX, and IECEx directives for safe operation in Zone 0, Zone 1, and Zone 2 explosive environments.

Features

• 8 mm Probe Tip: Employs a robust polyphenylene sulfide (PPS) tip chemically resistant to corrosive industrial chemicals, solvents, and hot machine lubricants.
• FluidLoc Cable Technology: Option 12 delivers a fluid-blocked internal core preventing oil-wicking or leakage from inside the machine casing through the cable jacket.
• Fully Threaded Body: Designed with a 3.0-inch case length and 0.0-inch unthreaded length for secure, direct mounting on thick-walled bearing housings.
• Hazardous Area Certified: Class I, Div 1/2 and Zone 0/1/2 approvals (CSA, ATEX, IECEx) verify safety in volatile petrochemical, refining, and gas-processing locations.
• ClickLoc Coaxial Connectors: Corrosion-resistant, gold-plated connections require only finger-tightening and provide an audible click to ensure a reliable latch.
• Rugged Mechanical Construction: AISI 303/304 stainless steel sleeve resists high vibration and heavy-duty mechanical wear.

Applications

The Bently Nevada 330101-00-30-20-12-05 is deployed in critical, heavy-industrial rotating assets where oil containment and explosion protection are crucial:

• Fluid-Flooded Machinery: Perfect for gearboxes, oil-lubricated pumps, and compressor housings where standard cables would permit lubricant migration.
• Petrochemical & Refining: Monitoring of gas compressor shafts and expanders in hazardous areas requiring ATEX/IECEx Zone ratings.
• Steam & Gas Turbines: Measuring journal bearing radial vibration, axial thrust position, and speed detection.
• Power Generation Equipment: High-reliability displacement and vibration sensing on large alternator shaft assemblies.

Ordering Information

Technical Specifications

Installation Guidelines

• Proper Gapping: Mount the probe with the appropriate physical gap between the probe tip and the target shaft (usually calibrated to 1.27 mm or 50 mils for standard 200 mV/mil output). Ensure correct voltage readings via a voltmeter before final tightening.
• Torque Limits: Tighten the probe case to a recommended torque of 7.5 N-m (66 in-lbf) to prevent physical deformation or damage. Do not exceed the maximum rating of 33.9 N-m (300 in-lbf).
• Connector Care: Hand-tighten the ClickLoc coaxial connectors until they click. Avoid using pliers unless mating a non-XL connector, in which case a 1/8 turn past finger-tight is recommended.
• Cable Routing: Observe the minimum cable bend radius of 25.4 mm (1.0 inch) during routing to prevent internal coaxial conductor damage. Use protective conduits if routing outside the machine casing.
• Grounding & Shielding: Connect and ground the shields of the field wiring at the Proximitor sensor or monitor rack end only. Ensure no multi-point grounding loops are created.

Compliance and Certifications

• ATEX/IECEx: Certified for intrinsically safe (Ex ia IIC T5...T1 Ga) and non-sparking/increased safety (Ex nA/Ex ec IIC T5...T1 Gc) operations in Zone 0, Zone 1, and Zone 2 hazardous environments.
• CSA/cCSAus: Class I, Division 1, Groups A, B, C, and D; Class I, Division 2, Groups A, B, C, and D.
• Environmental: Conforms to strict industrial temperature and humidity limits (tested in 93% relative humidity in accordance with IEC 68-2-3).