Bently Nevada 330104-11-22-10-02-CN Migration-Ready Proximity Transducer

Overview

Bently Nevada 330104-11-22-10-02-CN Migration-Ready Proximity Transducer for Legacy Control Systems

The Bently Nevada 330104-11-22-10-02-CN is an 8mm proximity transducer from the 3300 XL Series, engineered to serve as a migration-ready replacement for aging vibration monitoring infrastructure in rotating machinery protection systems. Whether your facility is retiring an obsolete 3300 Series rack, upgrading a legacy System 1 monitoring platform, or restoring a critical machine protection loop after a component failure, this transducer delivers the dimensional accuracy, signal linearity, and connector compatibility required for a seamless field retrofit without rewriting your existing protection logic or rewiring your junction boxes.

Procurement engineers and reliability teams working on turbine, compressor, pump, and motor protection upgrades consistently select the 330104-11-22-10-02-CN because it maintains the standard -18 VDC bias voltage output and 200 mV/mil sensitivity that legacy Bently Nevada monitors expect. This means your existing 3300 XL Proximitor® sensor, such as the 330180-91-00 or 330130-080-00-00, can remain in service while only the transducer tip is replaced — a critical advantage when minimizing scope creep during a planned outage window.

Migration Compatibility Table

Retrofit Planning for Existing Automation Systems

A successful retrofit of the 330104-11-22-10-02-CN into an existing machine protection system begins well before the maintenance window opens. The first step is confirming that the installed Proximitor® sensor — typically a 330180-91-00 or a 330130-080-00-00 — is still within its operating specification. If the Proximitor® is also degraded, it should be replaced simultaneously to avoid a repeat outage. The Proximitor® converts the transducer’s eddy-current signal into the -18 VDC bias and AC vibration voltage that the monitor card reads, so a failing sensor will corrupt readings even with a new transducer installed.

Next, verify the 3300 XL monitor rack’s power supply module. The 3300/15 Power Supply or equivalent must be delivering stable ±24 VDC to the Proximitor® circuit. A marginal power supply that has been in service for over a decade may introduce noise that mimics a transducer fault. Replacing the power supply during the same outage window is a common best practice on aging racks.

Cable routing and extension cable selection are equally critical. The 330104-11-22-10-02-CN ships with a 1.0-meter integral cable. If the distance from the probe tip to the Proximitor® exceeds this length — which is typical in most field installations — a matched 3300 XL extension cable must be selected. The total system cable length (probe cable + extension cable) must fall within the Proximitor®’s specified range to maintain calibration accuracy. Using a mismatched or non-Bently Nevada extension cable is one of the most common causes of post-retrofit calibration drift.

For facilities that are simultaneously upgrading from a 3300 XL rack to a 3500 Series rack, the 330104-11-22-10-02-CN remains compatible when paired with the appropriate 3500/42M Proximitor®/Seismic Monitor or a 3500/40M Proximitor® Monitor. In this scenario, the I/O module wiring in the 3500 rack must be verified against the existing junction box terminal assignments. The 3500 Series uses a different I/O module form factor, so terminal block adapters or rewiring of the field cable home-run may be required. The HMI display pages in System 1 software will also need to be updated to reflect the new rack address and channel mapping if the monitor slot position changes.

Signal isolation should be reviewed if the machine train includes both radial vibration probes and a Keyphasor® transducer on the same shaft. The Keyphasor® signal — often sourced from a 330104-00-06-10-02-CN or similar once-per-revolution probe — feeds the phase reference input on the monitor. Confirming that the Keyphasor® channel is not sharing a common ground path with the radial vibration channels prevents ground loop interference that can appear as a spurious 1X vibration component after the retrofit is complete.

Finally, if the control system includes a DCS or safety PLC receiving 4–20 mA retransmission outputs from the 3300 XL monitor, verify that the retransmission scaling has not shifted after the transducer swap. A new transducer with a slightly different gap voltage at the installed air gap can shift the 4–20 mA output by a small but measurable amount, which may trigger nuisance alarms in the DCS historian or the safety instrumented system.

Downtime Control During System Migration

Controlling downtime during a proximity transducer retrofit requires a disciplined pre-outage preparation process. Before the machine is taken offline, the replacement 330104-11-22-10-02-CN should be bench-tested using a portable calibration fixture to confirm that its gap voltage curve matches the Proximitor®’s calibration data. This pre-verification step eliminates the risk of discovering a defective replacement unit after the machine is already shut down and the original transducer has been removed.

The existing probe gap setting — typically recorded in the machine’s maintenance history as a specific bias voltage (e.g., -10.0 VDC at the nominal air gap) — should be documented before removal. This value becomes the target during reinstallation. Using a digital multimeter at the Proximitor® output terminals, the technician can adjust the new probe’s axial position in the probe holder until the bias voltage matches the historical setpoint, then lock the probe in place with the locknut. This process typically takes 15 to 30 minutes per probe and does not require the monitor to be taken out of service if a bypass jumper is used on the monitor channel during the swap.

For facilities operating under a safety instrumented system, the SIS bypass procedure must be activated before the transducer channel is taken out of service. The bypass log must be documented and the bypass timer must be set in accordance with the site’s functional safety management plan. Failure to follow this procedure can result in a spurious trip or, worse, a missed trip if the machine develops a genuine fault during the maintenance window.

Once the new transducer is installed and the gap voltage is verified, the monitor channel should be returned to service and the vibration trend data should be observed for a minimum of 15 minutes before the machine is restarted. Any unexpected change in the noise floor or DC bias compared to the pre-outage baseline should be investigated before the machine is brought back online. This final verification step is the most effective way to confirm that the retrofit has been completed correctly and that the protection system is fully functional.

Retrofit Support FAQ

Q1: Is the 330104-11-22-10-02-CN a direct drop-in replacement for other 3300 XL 8mm probes?
Yes. The 330104-11-22-10-02-CN is dimensionally and electrically compatible with other Bently Nevada 3300 XL 8mm proximity transducers that share the same M10 x 1.0 thread, 200 mV/mil sensitivity, and standard coaxial connector. Always verify the total system cable length against the installed Proximitor® model’s specification before finalizing the replacement selection.

Q2: What commissioning checks are required after installation?
After installation, verify the DC gap voltage at the Proximitor® output terminals against the historical setpoint, confirm cable continuity from the probe tip to the Proximitor® input, check the noise floor on the monitor’s vibration channel with the machine at rest, and confirm that the 4–20 mA retransmission output (if used) is within the expected range. Document all readings in the maintenance record before returning the machine to service.

Q3: Do you provide pre-shipment testing, and what does the support terms confirmed by quotation cover?
Yes. Every 330104-11-22-10-02-CN unit is functionally tested before shipment to verify gap voltage linearity and connector integrity. The support terms confirmed by quotation cover manufacturing defects in materials and workmanship from the date of shipment. It does not cover damage resulting from incorrect installation, mismatched cable systems, or operation outside the specified environmental limits.

Q4: What is your typical lead time and inventory availability?
We maintain stock of the 330104-11-22-10-02-CN for immediate shipment. Standard orders are dispatched within 1–3 business days. For urgent plant shutdowns or emergency replacement requirements, please contact our sales team directly to confirm real-time inventory status and expedited shipping options.

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Product Identification

Brand / Ecosystem

Bently Nevada
Bently Nevada

Model / Series

330104-11-22-10-02-CN
Bently Nevada 3300 XL / 3301 Series

Product Family

Sensors

Availability Status

Available on request after model and quantity confirmation

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B2B RFQ, replacement inquiry and project spare-part request

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Sensor range

Photoelectric, proximity and process sensors

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Output type, distance and connector

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Machine detection and replacement inquiry

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• NPN/PNP, analog and digital output checking
• Connector and cable compatibility review
• Fast inquiry support for maintenance teams

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