Description

Engineered for maximum reliability in industrial vibration monitoring, the Bently Nevada 330101-00-12-20-12-CN is an 8 mm unarmored proximity probe designed to perform non-contact shaft displacement and dynamic motion measurements. This specific configuration distinguishes itself from standard configurations by integrating a zero unthreaded length (0.0 inches), a compact 1.2-inch threaded case, and a 2.0-meter total cable length. Critically, it features a specialized FluidLoc cable option (-12) that prevents oil, moisture, and other process liquids from migrating through the internal structure of the cable, making it ideal for highly demanding rotating machinery environments where housing sealing is paramount. It is supplied with the -CN suffix, indicating compliance with China's strict hazardous area certification standards including NEPSI and CCC.

Operating as a key component of the 3300 XL 8 mm Proximity Transducer System, this sensor works on the eddy current principle to provide highly accurate displacement signals. When paired with a 3300 XL Proximitor sensor and an appropriate extension cable, the system delivers a linear output voltage directly proportional to the distance between the probe tip and the observed conductive target, such as an AISI 4140 steel shaft. The unarmored design allows for convenient installation within protection conduit or internal bearing housings, providing crucial predictive maintenance data for critical rotating assets.

Features

• 8 mm Probe Tip: High-performance non-contact displacement sensor utilizing advanced eddy current technology.
• Zero Unthreaded Length: Fully threaded 1.2-inch case provides a rigid mount and allows installation in tight bearing housing envelopes.
• FluidLoc Cable Technology: Specialized cable design blocks internal fluid migration, preventing oil or process gas from leaking out along the cable.
• Standard 3/8-24 UNF Thread: Provides standard forward-mount compatibility without requiring custom adapters.
• Unarmored Design: Flexible 75 ohm triaxial cable allows easy routing through conduit runs and junction boxes.
• China Certification Package (-CN): Full NEPSI and CCC hazardous area certifications, meeting regulatory requirements for safe deployment in China.

Applications

• Steam and gas turbine shaft vibration and axial position measurement.
• Centrifugal and reciprocating compressor rotor displacement monitoring.
• High-pressure industrial pump shaft movement detection.
• Permanent machinery protection installations on gearboxes and generator bearings.
• Predictive maintenance programs in hazardous industrial environments across China.

Ordering Information

Technical Specifications

Installation Guidelines

For correct system calibration and trouble-free operation, please observe the following engineering guidelines during installation:

• Probe Gapping: Set the probe gap to the appropriate distance (typically 1.27 mm or 50 mils for standard AISI 4140 steel targets) as defined by your 3300 XL Proximitor calibration specifications.
• Torque Limits: Mount the probe with a standard forward-mount thread. Tighten the probe case to a recommended torque of 11.2 N-m (100 in-lbf). Do not exceed the maximum torque rating of 33.9 N-m (300 in-lbf) to prevent damage to the threads.
• Cable Routing: Always protect the unarmored FluidLoc cable by routing it through a rigid or flexible protective metal conduit. Maintain a minimum bend radius of 25.4 mm (1.0 in) along all sections of the run to prevent damage to the inner triaxial conductor.
• Fluid Sealing: This FluidLoc configuration blocks internal path leakage; however, ensure external thread seals or gaskets are applied if a liquid-tight seal is required on the bearing housing interface.
• Shielding and Grounding: Ensure the probe and extension cable shields are properly grounded at the Proximitor sensor housing or instrument panel to guard against electromagnetic interference (EMI).

Compliance and Certifications

The 330101-00-12-20-12-CN is manufactured to rigorous industrial compliance standards. The trailing -CN designation signifies that this hardware is officially certified for safe deployment in Chinese hazardous environments, having achieved local compliance standards including:

• NEPSI: Certified safe for use in explosive and hazardous atmospheres in China.
• CCC: China Compulsory Certificate approval for mechanical and electrical safety within industrial plants.