Bently Nevada 330876-10-01-00 – 3300 XL NSv Proximity Transducer Assembly for Tight-Clearance Vibration/Position Monitoring

The Bently Nevada 330876-10-01-00 is commonly specified as part of the 3300 XL NSv proximity transducer assembly—designed for reliable displacement and vibration measurement where space is limited around bearings, seals, and shaft ends. From my experience, teams pick this NSv variant when standard 8 mm probes won’t fit, yet API 670-style machinery protection is still required. When mated with its matching 3300 XL NSv Proximitor sensor, the system typically delivers a 200 mV/mil (7.87 mV/µm) output, giving a clean, linear signal into 3500 series monitors. You might notice that installation flexibility and long-term stability are the real draws here, especially on compressors, small-frame turbines, and high-speed pumps.

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Key Features

• NSv (Narrow Side-view) form factor – fits tight radial spaces around critical rotating assets without sacrificing signal quality.
• Matched system performance – when paired with a 3300 XL NSv Proximitor, the system sensitivity is typically 200 mV/mil (7.87 mV/µm) and API 670 friendly.
• Stable long-term measurements – eddy-current technology resists contamination and provides dependable shaft vibration and position data.
• Rugged cabling – integral mini‑coax construction helps with noise immunity and secure connections through armor or conduit.
• Drop-in plant compatibility – widely used with Bently Nevada 3500 monitors, buffered outputs, and standard proximity channel cards.
• Built for harsh environments – probe assemblies in this series generally withstand elevated temperatures and oil-rich atmospheres.

Technical Specifications

Application Fields

This model is typically chosen for radial vibration and axial position measurements where clearance is limited:

• Compressors and expanders with small bearing housings
• Steam and gas turbines (tight-end bearing locations)
• High-speed pumps and vertical pump thrust position
• Gearboxes and test stands where probe access is constrained
• API 670 compliant condition monitoring with Bently Nevada 3500 series

Feedback we hear often: “It fit where our standard 8 mm probe couldn’t, and once gapped, the trace was flat and repeatable.” That seems to be the typical experience on brownfield retrofits.

Advantages & Value

• Reliability – Proven 3300 XL architecture with stable calibration over time and temperature.
• Compatibility – Works with standard Bently Nevada Proximitor and 3500 monitors, reducing integration risk.
• Lower installed cost – Smaller probe and flexible routing cut machining time on cramped bearing housings.
• Procurement confidence – Clear part coding, fast delivery windows, and a 365-day warranty mitigate downtime risk.
• Technical support – Guidance on gap setting, cabling, and matching Proximitor selection simplifies commissioning.

Installation & Maintenance

• Environment: Mount the probe in a clean, rigid port; avoid magnetic materials near the tip; maintain the recommended gap per system datasheet.
• Cabinet/wiring: House the Proximitor in a ventilated control cabinet; route mini‑coax separately from high-voltage lines; bond shield at the Proximitor end only.
• Mechanical: Use jam nuts to lock the probe; where possible, run armored cable or conduit to protect from oil and mechanical damage.
• Safety: Isolate machinery before access; confirm ground integrity and polarity on monitor terminations.
• Routine checks: Verify gap and linearity during outages; clean probe tips; inspect cable armor and connectors; update monitor firmware when applicable.
• Calibration: In most cases, field verification against a calibrated scale and buffered output is sufficient; full calibration is done at the system level with the matched Proximitor.

Quality & Certifications

• Certifications: CE marked; RoHS compliant; manufactured under ISO 9001 quality systems (typical for the 3300 XL family)
• Warranty: 365-day warranty coverage

Common Supporting Components (for a complete system)

• 3300 XL NSv Proximitor sensor (e.g., 330850-XX-XX-XX) – required to drive the probe and provide the conditioned output
• Extension cable (e.g., 330180-XX-XX) – length to suit distance between probe and Proximitor
• 3500/40M, 3500/42M or similar proximity/vibration monitor modules – for protection and trending
• Armor kits, gland fittings, and brackets – to protect routing and ease maintenance in oil-rich environments

If you’re matching an existing site standard, share your dash-codes and installed lengths. One thing I appreciate is how predictable these NSv assemblies are when the probe, cable, and Proximitor are correctly paired—the commissioning curve usually lines up right on the datasheet.