330903-00-02-10-12-05 Bently Nevada | Proximity Probe

Bently Nevada 330903-00-02-10-12-05 3300 NSv Proximity Probe

The unit functions as a high-precision eddy current proximity transducer engineered for industrial vibration monitoring and shaft position displacement tracking. Optimized for small-bore clearances and fluid-heavy environments, this specialized 3300 NSv probe features enhanced chemical resistance and robust mechanical sealing, making it ideal for monitoring process compressors, turbines, and high-response rotating machinery loops.

Technical Specifications

Quick Installation Guide

• Mount the M8×1 threaded housing into the machine chassis casing, ensuring that the maximum length of thread engagement does not exceed 12 mm.
• Thread the probe barrel until it is finger-tight, then tighten to the recommended installation torque of 5.1 N·m (45 in·lb). Never exceed the absolute ceiling torque of 7.3 N·m (65 in·lb) to prevent shearing.
• Position the probe tip relative to the target shaft to establish a recommended physical gapping baseline of 1.0 mm (40 mils), which corresponds to the midpoint of the 1.5 mm linear monitoring field.
• Route the 1.0-meter 75Ω FEP-insulated coaxial cable through the machine housing, keeping the physical path loops above a minimum bend radius of 25.4 mm (1.0 inch) to preserve internal core conductors.

Technical FAQs

Q1: What are the main physical advantages of the FluidLoc cable and PPS tip options?
A1: The FluidLoc cable core incorporates internal blocking barriers that prevent process liquids and corrosive gasses from wicking through the wire sleeve. Paired with a high-durability Polyphenylene sulfide (PPS) tip and an internal Viton O-ring pressure seal, this 0.15 kg sensor provides superior chemical tracking protection compared to legacy 3300 RAM series equipment.

Q2: How do target shaft sizes smaller than the recommended parameters affect measurement stability?
A2: For precise eddy current calibration, the target surface requires a minimum diameter of 8.9 mm and a recommended optimal surface area diameter of 13 mm. Measuring shafts narrower than 13 mm alters the Incremental Scale Factor (ISF). In these tight environments, shrinking the physical gap setup below 1.0 mm helps limit calibration drift and keeps cross-talk minimal.

Q3: What constraints govern field wiring lengths between the Proximitor sensor and monitoring racks?
A3: Field connections support 16 to 24 AWG wiring (or up to 23 AWG with protective terminal ferrules), utilizing standard three-conductor shielded triad cables. While the frequency response scales perfectly from 0 to 10 kHz within a 305-meter (1,000 feet) wiring envelope, running long connections past this boundary will introduce high-frequency signal rolloff due to accumulation capacitance.