Bently Nevada 330103-00-20-10-02-CN Replacement 3300 XL

Product Overview

Bently Nevada 330103-00-20-10-02-CN Replacement 3300 XL: Seamless Transition from Legacy Vibration Monitoring Systems

The Bently Nevada 330103-00-20-10-02-CN is an 8mm eddy-current proximity probe from the industry-standard 3300 XL Series, engineered for continuous shaft vibration, position, and eccentricity measurement in rotating machinery protection systems. As legacy installations age and OEM support windows close, facilities running older 3300 Series or 7200 Series transducer systems face increasing pressure to migrate to maintained, in-production hardware without disrupting critical machinery protection loops. This replacement solution is designed to eliminate that risk.

Whether your plant is retiring a 3300 5mm probe array, decommissioning a 7200 Series eddy-current system, or simply replacing a failed sensor in an active Bently Nevada ADAPT or System 1 monitoring architecture, the 330103-00-20-10-02-CN integrates directly into existing wiring, conduit runs, and rack-mounted monitor slots with no signal conditioning changes required. The CN connector format is fully compatible with standard Bently Nevada extension cable assemblies, including the 330130 and 330180 series cables, allowing field technicians to swap the probe without reterminating the cable at the proximitor or junction box.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful migration from a legacy vibration monitoring system to a current 3300 XL architecture involves more than swapping the probe. In most retrofit projects, the 330103-00-20-10-02-CN is installed alongside a 330180-51-05 extension cable, which bridges the probe to the proximitor driver without requiring new conduit routing. The proximitor itself — typically a 330130-040-00-00 or 330180-X1-05 3300 XL Proximitor — converts the eddy-current signal to a DC voltage proportional to gap distance, feeding directly into a 3500/40M Proximitor Monitor or 3500/42M Proximitor Monitor card seated in a 3500 Rack.

For plants upgrading from older 3300/16 monitor cards, the rack backplane and I/O module wiring can often be retained, with only the monitor card and probe assembly requiring replacement. Where the existing 3300 RAM (Rack Adapter Module) is still serviceable, it can continue to provide the –24 VDC bias supply to the new probe-proximitor pair without modification. In installations where the control cabinet houses both vibration and process I/O, a signal isolator or barrier module may be added between the proximitor output and the DCS analog input card to maintain loop integrity during the transition.

Facilities running Bently Nevada System 1 condition monitoring software will find that the 330103-00-20-10-02-CN integrates without requiring database reconfiguration, as the transducer sensitivity and gap voltage characteristics are identical to the previous 8mm probe population. For sites also upgrading keyphasor channels, the 330980-50-05 Keyphasor Probe is a common companion replacement, sharing the same CN connector format and installation bracket standard. Where multiple measurement planes are being retrofitted simultaneously, the 3500/22M Transient Data Interface module can be added to the rack to capture startup and shutdown waveform data from the new probe array.

In turbomachinery applications — compressors, steam turbines, and pumps — the probe is typically mounted in a radial position on a custom bracket welded or bolted to the bearing housing. The M10 threaded probe body of the 330103-00-20-10-02-CN fits standard BN probe brackets without machining, and the 2.0m cable length accommodates most bearing-to-junction-box runs in medium-frame rotating equipment. For large-frame machines where cable runs exceed 2.0m, a 330130 extension cable can be spliced in at the CN connector junction to reach the proximitor mounted in the local control panel.

Retrofit Guidance FAQ

Q: Can I replace a 3300 5mm probe with this 8mm unit without modifying the bearing housing?
A: No — the probe tip diameter and thread size differ between 5mm and 8mm probes. The bearing housing bore and bracket must be machined or replaced to accept the M10 thread of the 8mm probe. If your installation uses 5mm probes, confirm the housing specification before ordering.

Q: Is the CN connector on this probe compatible with my existing extension cable?
A: Yes, provided your existing cable uses the standard Bently Nevada CN coaxial connector (330130 or 330180 series). The connector mates directly without adapters. Inspect the cable connector for corrosion or mechanical damage before reuse.

Q: Will the 3500/40M monitor require recalibration after probe replacement?
A: The 3500/40M stores transducer configuration in its internal database. If the replacement probe has the same sensitivity (7.87 mV/µm) and gap voltage characteristics as the original, no recalibration is required. Verify the OK setpoint and gap voltage at commissioning.

Q: What communication protocol does the 3500 rack use, and does this probe affect it?
A: The 3500 rack communicates via Modbus TCP, Ethernet/IP, or proprietary Bently Nevada protocol depending on the communication gateway module installed (e.g., 3500/92 Communication Gateway). The probe itself is an analog sensor and does not affect the rack’s digital communication configuration.

Q: How much physical space does the probe and cable assembly require in the control cabinet?
A: The probe body is compact and mounts externally on the machine. The CN connector and cable entry into the cabinet require a standard cable gland (M20 or equivalent). The proximitor module (330180 series) mounts on a standard DIN rail or panel surface and occupies approximately 100mm × 60mm of panel space.

Q: Can this probe be used as a direct spare for a failed unit without a full system shutdown?
A: In most installations, the probe can be replaced during a planned maintenance window without a full system shutdown, provided the monitor channel is placed in bypass mode and the machine is at a safe operating condition. Always follow your site’s MOC (Management of Change) and safety procedures before replacing live instrumentation.

Warranty Assurance

Every 330103-00-20-10-02-CN unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to dispatch, each probe assembly undergoes functional verification including connector integrity check, cable continuity test, and visual inspection of the probe tip and body for mechanical damage. Units that do not meet specification are quarantined and not shipped.

In the event of a warranty claim, TOPNLMS provides replacement support with priority processing for critical plant applications. Our technical team is available to assist with installation questions, compatibility verification, and commissioning guidance. We maintain stock of the 330103-00-20-10-02-CN and related 3300 XL Series components to support rapid dispatch for urgent replacement requirements.

Procurement teams can request a certificate of conformance, packing list, and commercial invoice with each shipment. Export documentation for international shipments is prepared in compliance with applicable trade regulations. Lead time for in-stock units is typically 1–3 business days from order confirmation.

For volume procurement, spare parts program inquiries, or technical pre-sales support, contact our team directly.