Bently Nevada 330903-00-03-10-12-00 | 3300 NSv M8X1 Probe

Bently Nevada 330903-00-03-10-12-00 Overview

The Bently Nevada 330903-00-03-10-12-00 is a high-precision 3300 NSv eddy current proximity probe configured for narrow installation spaces and demanding process compressor environments. It features an unarmored M8X1 threaded case, a 1.0-meter integrated FluidLoc moisture-blocking cable, and a miniature coaxial ClickLoc connector. Engineered as a chemically robust upgrade to legacy 3300 RAM sensors, this ultra-lightweight probe has a net weight of approximately 0.15 kg, providing non-contact, high-frequency vibration and displacement measurements on critical rotating machinery components without adding load to sensitive brackets.

Core Technical Advantages

Advanced Chemical & Side-View Performance

Constructed with a polyphenylene sulfide (PPS) tip, the 3300 NSv sensor yields superior chemical resistance in corrosive process gases. Its specialized side-view characteristics reduce cross-talk and field distortion when operating close to surrounding machine casings or restrictive target dimensions.

FluidLoc & ClickLoc Coaxial Integrity

The integrated 75 Ω fluoroethylene propylene (FEP) insulated probe cable features FluidLoc technology to stop target process liquids from wicking through the cable interior. The terminal end uses a miniature coaxial ClickLoc connection mechanism to safeguard signal transmission.

Linear Telemetry Precision

Delivers a defined 1.5 mm (60 mils) linear range with an incremental scale factor (ISF) of 7.87 V/mm (200 mV/mil), providing stable dynamic linearity across a wide temperature spectrum from -52°C to +177°C.

Technical Specifications

Installation & Engineering Guide

Mechanical Torque and Engagement Constraints

When threading the M8X1 case into a machine bracket, do not exceed the maximum allowable thread engagement length of 12 mm. Tighten the probe housing structure to a recommended torque of 5.1 N•m (45 in•lb), keeping strictly under the maximum threshold of 7.3 N•m (65 in•lb) to prevent case stripping.

Target Area Optimization and Scale Calibration

To preserve precise scaling, the target face should ideally have a minimum diameter of 13 mm (0.5 in). For shaft surfaces under 13 mm, ensure the baseline voltage gap is slightly compressed during calibration to limit changes to the scale factor.

Cable Handling and Routing Restrictions

Maintain an internal loop cable bend radius of at least 25.4 mm (1.0 in) to prevent damaging the internal coaxial shielding. Finger-tighten the miniature ClickLoc connector interfaces to a maximum limit of 0.56 N•m (5 in•lb).

Technical FAQs

Q1: What is the nominal core DC loop resistance value for this specific 1-meter probe model?
A1: The 1.0-meter variant of the 330903 transducer exhibits a resistance profile from the center conductor to the outer shield conductor of exactly 4.2 ± 0.5 Ω.

Q2: Can this unarmored 3300 NSv sensor directly substitute older 3300 RAM series equipment?
A2: Yes. The 3300 NSv is mechanically and electrically compatible and interchangeable with previous 3300 RAM proximity probes and extension cables, while offering superior chemical resistance.

Q3: What is the recommended gap configuration voltage and distance for optimal field profiling?
A3: The manufacturer recommends a physical gap setting of 1.0 mm (40 mils) relative to the target shaft, which aligns with the center of the probe’s linear measurement range.