Bently Nevada 330907-05-30-05-02-00 3300 NSv Reverse Mount Probe

Description

330907-05-30-05-02-00 specifies a metric reverse-mount proximity probe within the 3300 XL NSv Proximity Transducer System family. This specific configuration is defined by a 5 mm unthreaded length (Option 05) and a 30 mm overall case length (Option 30) with metric M10x1 threading, paired with a 0.5 meter (20 in) standard coaxial cable (Option 05) and a standard ClickLoc miniature connector (Option 02) without hazardous area approval requirements (Option 00).

Unlike standard proximity probes that thread into place from the outside of a machine casing, reverse-mount probes are designed to be installed from the inside of the casing or bulkhead. This design is crucial for restricted spaces, small-bore machinery, process gas compressors, and fluid-filmed bearing applications where counterbore or side-view clearances limit the use of standard-mount 5 mm or 8 mm transducer probes. It functions as a non-contact displacement sensor to monitor shaft vibration and axial position on targets with tight geometries.

Features

• M10x1 metric threads with a pre-configured 5 mm unthreaded length and 30 mm overall case length.
• Gold-plated brass ClickLoc coaxial connector provides a robust, vibration-resistant electrical coupling.
• Integrated 0.5 meter standard coaxial cable utilizing CableLoc design to withstand up to 220 N of pull tension.
• TipLoc molding process creates a high-integrity mechanical and chemical bond between the polyphenylene sulfide (PPS) probe tip and the AISI 304 stainless steel case.
• Enhanced side-view and small-target performance, specifically optimized for targets with reduced geometry or narrow mounting clearances.

Applications

• Radial vibration and radial position measurements on high-speed rotating shafts.
• Axial (thrust) position measurements on small machinery rotors.
• Centrifugal air compressors, refrigeration compressors, and process gas compressors.
• Machinery with tight installations requiring an internal reverse-mount probe configuration.

Ordering Information

Technical Specifications

Installation Guidelines

• Mounting Method: Install the probe from the inside of the machine casing. Carefully thread the probe body outward into the mounting hole until the desired gap is achieved.
• Target Gap Adjustment: Set the nominal gap to 1.0 mm (40 mils) using a physical feeler gauge or by monitoring the DC voltage output of the Proximitor Sensor (typically -9.0 Vdc to -10.0 Vdc at nominal gap).
• Torque Limits: Secure the probe case to a recommended installation torque of 11.3 N m (100 in lb). Do not exceed the maximum rating of 22.6 N m (200 in lb).
• Cable Bend Radius: Maintain a bend radius of at least 25.4 mm (1.0 in) for all coaxial cabling to ensure electrical performance and prevent physical wear.
• Environmental Protection: Protect the connector mating point using connector protectors or silicone self-fusing tape to prevent oil, water, or other process fluids from degrading the coaxial signal. Do not use silicone tape in environments directly flooded with turbine oil.

Compliance and Certifications

• CE Mark: Meets European Union requirements under the EMC Directive 2014/30/EU and RoHS Directive 2011/65/EU when used in a complete certified transducer chain.
• RoHS: Compliant with requirements limiting hazardous substances.
• Functional Safety: SIL 2 (HFT = 0) and SIL 3 (HFT = 1) capable under the IEC 61508 standard.