330908-00-30-10-01-05 Bently Nevada Compressor Probe

Product Overview

The Bently Nevada 330908-00-30-10-01-05 is a high-precision 3300 NSv proximity probe engineered for critical machinery protection and continuous condition monitoring. This eddy current sensor features a standard 3/8-24 UNF fractional thread configuration, designed completely without protective armor. Sized with a 00 inch unthreaded section and a 3.0-inch overall case length, it comes with a 1.0-meter (39-inch) integrated coaxial cable terminated via a miniature coaxial ClickLoc connector and a factory-fitted connector protector. Certified with multiple agency approvals (-05 option), this robust sensor assembly carries a nominal weight of approximately 0.23 kg (0.51 lbs). The 3300 NSv platform is optimized for industrial installations requiring superior side-view characteristics and enhanced chemical resistance, allowing it to seamlessly replace legacy 3300 RAM hardware in centrifugal compressors, pumps, steam turbines, and gas turbines.

Core Technical Advantages

Enhanced Process Chemical Resistance

The probe tip is molded from high-grade Polyphenylene Sulfide (PPS) and coupled with an internal Viton O-ring seal. This premium material composition delivers robust structural defense against corrosive fluids and harsh gases, making it an excellent match for demanding process compressor loops.

Superior Side-View Characteristics

Engineered to outperform vintage 3000-series 190 probes, the 3300 NSv hardware structure offers tight lateral field management. When gapped at identical operational distances from target shafts, it dramatically limits side-wall interference and avoids signal degradation from surrounding machine surfaces.

ClickLoc Coaxial Connection System

Equipped with a miniature coaxial ClickLoc termination and an integrated connector protector, this probe provides a vibration-proof signal link. The specialized connection prevents moisture ingress and mechanical loosening, ensuring clean, continuous data transmission to your monitoring rack.

Technical Specifications

Installation and Maintenance

Mechanical Insertion and Torque Thresholds

This 3/8-24 UNF threaded sensor must be handled with precise mechanical care. Given its light footprint and precise engineering, ensure the maximum length of thread engagement does not exceed 0.563 inches during bracket mounting. For the first three threads, tighten the case nuts to a recommended torque of 7.5 N•m (66 in•lb), never exceeding the 22.6 N•m (200 in•lb) structural limit. For full case installation, the recommended torque is 11.3 N•m (100 in•lb) with an absolute max rating of 33.9 N•m (300 in•lb).

Coaxial Cable Care and Minimum Bend Radius

The 75-ohm FEP-insulated coaxial line requires deliberate field routing. Maintenance crews must maintain a minimum static bend radius of 25.4 mm (1.0 inch) along the cable run. When coupling the ClickLoc links, attach the connector protector to avoid moisture intrusion and torque connections strictly to a finger-tight maximum of 0.56 N•m (5 in•lb).

Target Size and Shaft Diameter Configuration

For accurate scale factor tracking, ensure your flat target areas provide an optimal minimum diameter of 13 mm (0.5 inches). Measuring axial positions on rotating target faces smaller than 8.9 mm (0.35 inches) will warp your scale factor; under small-shaft conditions, reduce your default operational gap to stabilize signal scaling.

Engineering Advantages

High-Frequency Response Curve

The 3300 NSv system features a clean frequency tracking range of 0 to 10 kHz (+0, -3 dB typical). This broad data band allows monitoring racks to capture high-velocity shaft dynamics and transient machinery faults with perfect precision, even with up to 305 meters (1000 feet) of field wiring.

Hazardous Location Temperature Schedule

Equipped with the -05 Multiple Approvals option, the probe features strict thermal safety classifications for explosive environments (EPL Ga/Gc/Dc). The ambient operational bounds span safely from -55°C up to +232°C depending on your plant's specific T-rating requirements (T1–T5).

Backwards Legacy Compatibility

The 330908 sensor series is completely mechanically and electrically compatible with legacy Bently Nevada 3300 RAM setups. Plant upgrades can be executed smoothly without requiring instrument panel re-drilling or immediate monitoring system overhauls.

Technical FAQs

Q1: What is the recommended baseline gap voltage setting for this eddy current probe?

A1: The recommended physical gap setting is 1.0 mm (40 mils). This matches the center point of its 1.5 mm linear monitoring window, which tracks between 0.25 mm and 1.75 mm from the target face (corresponding to roughly -1 to -13 Vdc output).

Q2: What are the primary electrical properties of the matching 3300 NSv extension cable?

A2: The extension cables exhibit a nominal center conductor resistance of 0.220 Ω/m, a shielding layer resistance of 0.066 Ω/m, and a typical baseline electrical capacitance rated at 69.9 pF/m to protect high-frequency signal returns.

Q3: Are these 3300 NSv proximity probes pressure-tested on the manufacturing line?

A3: While they incorporate a rugged Viton O-ring designed to block differential process pressures between the tip and steel case, they are not custom pressure-tested before leaving the factory. For high-pressure containment certification, contact custom application teams prior to order sourcing.

Commercial Contact Email: sale@etowonauto.com