Bently Nevada 330902-00-38-05-02-05 3300 NSv Proximity Probe

Description

330902-00-38-05-02-05 specifies a 3300 NSv proximity probe configured with a 1/4-28 UNF thread and protective stainless steel armor. This specific configuration features a 0.0-inch unthreaded length (Option 00), a 3.8-inch overall case length (Option 38), a 0.5-meter (20-inch) total length (Option 05), a miniature coaxial ClickLoc connector on standard cable (Option 02), and multiple agency hazardous area approvals (Option 05).

Designed for non-contact displacement measurements in machinery with tight physical clearances, the 3300 NSv transducer system replaces older 3300 RAM and 3000/7000-series systems. This configuration uses its integrated stainless steel armor to shield the coaxial cable against mechanical wear, abrasion, and debris in small-bore rotating machinery such as centrifugal compressors.

Features

• Option 00 specifies a 0.0-inch unthreaded portion, making the probe body fully threaded.
• Option 38 provides a 3.8-inch overall case length with a 1/4-28 UNF-2A thread.
• Option 05 establishes a total probe length of 0.5 meters (20 inches) to prevent excessive internal cabling.
• Option 02 includes a miniature coaxial ClickLoc connector with standard FEP-jacketed cable.
• Option 05 multiple approvals package covers CSA, ATEX, and IECEx certifications for hazardous environments.
• Integrated stainless steel armor provides physical cable protection from crushing and abrasion.
• Viton O-ring tip seal prevents differential pressure leakage between the probe tip and the machine case.

Applications

The 3300 NSv proximity probe is primarily used in fluid-filmed bearing machines with small shaft diameters or restricted side-view access. Key applications include:

• Centrifugal air compressors and refrigeration compressors
• Small-bore machinery and high-speed equipment with limited target geometry
• Radial vibration and radial position measurements
• Axial (thrust) position measurements
• Tachometer, zero speed, and phase reference (Keyphasor) signal generation

Ordering Information

Technical Specifications

Installation Guidelines

To ensure precise performance and long operational life, adhere to these technical installation practices:

• When drilling and tapping holes for a 1/4-28 probe, a #3 or larger tap drill is recommended.
• Do not exceed the maximum recommended torque of 5.1 N-m (45 in-lb) or the absolute maximum rated torque of 7.3 N-m (65 in-lb) on 1/4-28 probe cases during installation.
• Ensure the coaxial cable maintains a minimum bend radius of 25.4 mm (1.0 inch).
• Protect all electrical connections from environmental humidity and oil ingress by installing a connector protector kit or applying silicone self-fusing tape.

Compliance and Certifications

• EMC Standards: EN 61000-6-2 (Industrial Immunity), EN 61000-6-4 (Industrial Emissions)
• Environmental Compliance: RoHS Directive 2011/65/EU; China RoHS EFUP designation of 15 years
• Functional Safety: SIL 2 certified (HFT = 0), SIL 3 certified (HFT = 1)
• Hazardous Area Approvals (Option 05 Multiple Approvals): Intrinsically Safe (Ex ia) and Non-sparking/Increased Safety (Ex nA/Ex ec) under ATEX, IECEx, and CSA standards for Zone 0, Zone 2, and Class I Division 1/2 areas