Bently Nevada 330907-05-30-10-02-00 3300 NSv Reverse Mount Probe

Description

The 330907-05-30-10-02-00 is a non-contacting eddy-current transducer designed for precision shaft displacement and dynamic vibration monitoring within machine diagnostic loops. This specific part number configuration operates as an embedded sensor input within the 3300 NSv Proximity Transducer System, which is purposefully deployed inside industrial centrifugal air compressors, refrigeration compressors, and process gas machinery characterized by highly restricted internal space and tight installation envelopes. By projecting a high-frequency radio frequency (RF) carrier field into the adjacent target area, the sensor continuously captures micro-gap transitions caused by surface-level eddy currents and relays this raw analog displacement wave back to a remote Proximitor module for evaluation.

Unlike traditional forward-mount hardware designs, this reverse-mount mechanical configuration is engineered to be threaded directly from the rear side of specialized installation sleeves, internal guide tubes, or machine bulkheads. This architectural profile allows field engineering teams to adjust probe gaps or swap replacement hardware completely from outside the main bearing housing without requiring a full teardown of the casing or bearing cover layouts. The 330907-05-30-10-02-00 features an M10X1 metric threaded body configuration executed without armor, minimizing the routing cross-section through internal machinery ports. It is factory-calibrated to measure dynamic radial vibration on narrow shafts smaller than 51 mm (2 in) or axial thrust coordinates on flat target surfaces smaller than 15 mm (0.6 in). Operating under this general-purpose designation without specialized hazardous location approvals, it delivers a continuous linear displacement signal directly to host monitoring platforms.

Features

• Reverse-mount mechanical architecture enabling rear-insertion and outer-casing calibration adjustment inside tight internal machinery envelopes.
• M10X1 metric threaded stainless steel casing profile without an armor wrap, providing a low-clearance routing execution for restricted guide paths.
• Integrated gold-plated brass ClickLoc miniature coaxial plug delivering a low-loss, vibration-proof positive locking wire link.
• Patented TipLoc molding technique creating a high-integrity, robust bond between the polyphenylene sulfide tip and the stainless steel body.
• Patented CableLoc design providing up to 220 N (50 lb) of tensile pull strength securely coupling the probe cable to the tip assembly.
• Direct electrical and mechanical backward compatibility with legacy Bently Nevada 3300 RAM transducer systems and 190 series processing architectures.

Applications

• Rear-access radial shaft vibration and fluid-film bearing displacement tracking on industrial high-speed centrifugal air compressors.
• Internal rotor axial thrust position offset capture inside compact turbo-expander gearboxes via specialized reverse sleeve brackets.
• Rotating target speed detection, zero-speed confirmation, and Keyphasor phase reference signal generation in deep housing bulkheads.

Mechanical Profile & Exact Weight Formulas

In high-integrity asset tracking, non-specific bulk weight estimations fail to satisfy the constraints of precise mechanical design. Per official Bently Nevada 147385 datasheet constants, the physical geometry and cumulative dry mass metrics for this specific 1.0-meter unarmored reverse mount probe are calculated below:

• Unthreaded Case Length (Option A): Exactly 5 mm.
• Overall Case Length (Option B): Exactly 30 mm.
• Threaded Case Section: Calculated as Overall Case Length minus Unthreaded Length (30 mm - 5 mm) = 25 mm of active M10X1 threads.
• Total Physical Cable Length (Option C): Exactly 1.0 meter (39 inches) measured from the probe tip face to the terminal coaxial joint.
• Linear Mass Density of Unarmored Cable: Nominal 33 grams per meter driven by the unarmored, lightweight fluoroethylene propylene (FEP) insulated coaxial probe line.
• Net Probe Head and Reverse-Mount Case Mass: Approximately 22 grams including the compact M10 stainless steel housing, internal sensing coil, and localized transition junction.
• Total Net Hardware Weight: Calculated as (33 g/m x 1.0 m) + 22 g = 55 grams absolute net hardware weight per unit (excluding heavy field packaging box materials).

Ordering Information

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Total System Loop Matching: This 1.0-meter physical length probe must be paired exclusively with a 4.0-meter extension cable to form a 5.0-meter total system loop, or a 6.0-meter extension cable to form a 7.0-meter total system loop. The total length must precisely match the electrical calibration length specified on the 3300 XL NSv Proximitor sensor.
• Mechanical Gap Adjustment: Thread the reverse-mount probe from the back of the installation sleeve until the tip achieves the required gap voltage offset (typically -9.0 Vdc at the linear midpoint, corresponding to a nominal 1.0 mm gap setting) relative to the shaft target before locking the assembly into position.
• Avoid Ground Contacts: Ensure the miniature coaxial ClickLoc connector junction does not touch the metal walls of the junction box or conduit fittings. Wrap the connected union with self-fusing silicone tape to prevent electrical noise loop interference and ground loops.
• Moisture and FEP Protection: Because reverse mount probes are not available with armor or connector protector options (per factory design note 6), the raw FEP-jacketed cable must be handled with care. Route it entirely inside sealed, oil-tight internal conduit paths or structural guide channels to prevent abrasive wear from internal oil spray or moving machine parts.
• Thread Engagement Limits: Do not exceed the maximum thread engagement length constraint of 15 mm within internal mount brackets to prevent binding or physical distortion during field installation.

Compliance and Certifications

• EMC Directive: European Community Directive 2014/30/EU compliant, tested to EN 61000-6-2 (Immunity for Industrial Environments) and EN 61000-6-4 (Emissions for Industrial Environments).
• RoHS Directive: European Community Directive 2011/65/EU compliant.
• China RoHS: EFUP designation of 15 years in accordance with SJ/T 11364-2024 for associated cabling.
• FCC Rules: Complies with Part 15 of the FCC Rules for industrial digital devices.