Bently Nevada 330901-10-25-10-02-00 3300 NSv Proximity Probe

Description

330901-10-25-10-02-00 is an unarmored 3300 NSv proximity probe configured with a 1/4-28 UNF thread, a 1.0-inch unthreaded case length, a 2.5-inch overall case length, a 1.0-meter total cable length, and a miniature coaxial ClickLoc connector on standard cable, without requiring hazardous area agency approvals. This non-contact, eddy-current displacement sensor is designed for tight clearances and reduced target areas where standard-sized proximity probe tips are too large to fit.

This 330901 configuration differs from armored models (such as the 330902 series) by omitting stainless steel armor on the 75-ohm coaxial lead, which allows for increased cable flexibility during routing in tight machinery casings. The Option 02 miniature coaxial ClickLoc connector provides a secure locking mechanism with a standard connection profile, making it suitable for clean, dry installations where a fluid-sealed connector protector (such as Option 01) is not required.

Features

• Option 10 unthreaded length specifies a 1.0-inch unthreaded casing section.
• Option 25 case length provides a 2.5-inch overall threaded casing length, allowing adjustable installation depth in machine housings.
• Option 10 total length includes a 1.0-meter (39 in) integrated FEP-insulated coaxial cable lead.
• Option 02 connector defines a gold-plated brass miniature coaxial ClickLoc connector on standard (non-FluidLoc) cable.
• Option 00 approval package indicates that no agency approvals or certifications are required for this general-purpose model.
• TipLoc molding method provides a robust chemical-resistant bond between the polyphenylene sulfide (PPS) probe tip and the AISI 303 stainless steel body.
• CableLoc design secures the cable to the probe assembly, offering 220 N of pull strength to prevent mechanical separation.

Applications

This transducer is designed for non-contact displacement, radial vibration, and axial position monitoring on high-speed rotating machinery with limited target geometries. Common applications include small-bore machinery, aeroderivative gas turbines, high-speed centrifugal compressors, and tight radial clearances where proximity probes must be mounted close together. It connects to the 3300 XL NSv Proximitor Sensor (330980) and 3300 NSv extension cable (330930).

Ordering Information

Technical Specifications

Installation Guidelines

• Maintain a minimum separation of at least 25 mm (1.0 in) for axial setups or 23 mm (0.9 in) for radial vibration setups to prevent electromagnetic cross-talk.
• Avoid exposing the probe to temperatures below -34 degC (-30 degF) for sustained periods to protect the internal Viton pressure seal.
• Use a #3 or larger tap drill when preparing internal casing threads for the 1/4-28 UNF-2A probe casing.
• Do not exceed the maximum thread engagement length of 0.375 inches for 1/4-28 threads.
• Torque the probe case during installation to the recommended 5.1 N-m (45 in-lb) and do not exceed the maximum limit of 7.3 N-m (65 in-lb).
• Hand-tighten ClickLoc connectors; do not exceed 0.56 N-m (5 in-lb) of torque on coaxial connections.