Bently Nevada 330104-00-19-05-01-CN Retrofit-Ready Proximity Transducer for 3300 XL Control Systems
The Bently Nevada 330104-00-19-05-01-CN is a high-precision eddy current proximity transducer engineered for seamless integration into existing 3300 XL Series vibration monitoring systems. As legacy machinery protection platforms age and original components reach end-of-life, this transducer provides a verified drop-in replacement path that preserves signal integrity, maintains system calibration, and eliminates the need for full panel redesign. Whether you are managing a planned outage, responding to an unplanned failure, or executing a phased modernization of your rotating machinery protection infrastructure, the 330104-00-19-05-01-CN delivers the dimensional accuracy, cable length, and sensitivity range required for direct substitution.
This transducer is designed for use with the standard 3300 XL proximitor/driver system. It operates within the established -24 VDC bias voltage range and produces a linear output of -7.87 V/mm (−200 mV/mil), fully compatible with the signal conditioning expectations of the 3300 XL 8mm Proximitor Sensor and associated monitor cards. When replacing a failed or degraded unit, engineers should verify the existing extension cable length and connector type — the 330104-00-19-05-01-CN ships with a 0.5 m armored integral cable and a standard TNC connector, matching the original factory specification for this SKU suffix configuration.
Upgrade Compatibility Table
| Parameter | 330104-00-19-05-01-CN | Notes / Retrofit Guidance |
|---|---|---|
| Series Compatibility | Bently Nevada 3300 XL | Direct replacement for 3300 XL 8mm proximity transducer configurations |
| Probe Tip Diameter | 8 mm | Verify target gap and mounting thread (M10 × 1) before installation |
| Integral Cable Length | 0.5 m (500 mm) | Match with existing 3300 XL extension cable; total system length must equal 5 m or 9 m |
| Connector Type | TNC (male) | Compatible with standard 3300 XL extension cable TNC female connector |
| Output Sensitivity | −7.87 V/mm (−200 mV/mil) | Matches 3300 XL Proximitor calibration curve; no recalibration required if gap is reset correctly |
| Bias Voltage | −10.0 VDC nominal at 1.27 mm gap | Confirm Proximitor output is within −10 ± 0.5 VDC after installation |
| Supply Voltage | −24 VDC (from Proximitor) | No separate power supply required; powered through extension cable |
| Communication / Protocol | Analog (4–20 mA / voltage output via Proximitor) | Compatible with 3300/16 and 3300/20 monitor cards; no protocol migration needed |
| Installation Interface | Threaded mounting, M10 × 1 | Use existing bracket; verify target material is ferromagnetic or conductive |
| Warranty | 12 Months | Covers manufacturing defects; includes pre-shipment functional test report |
Retrofit Planning for Existing Automation Systems
Replacing a proximity transducer within a live rotating machinery protection system requires careful coordination across multiple hardware layers. The 330104-00-19-05-01-CN integrates directly with the 3300 XL Proximitor Sensor (typically mounted in a junction box near the machine), which in turn connects to a 3300/16 or 3300/20 monitor card housed in a 3300 Rack. Before pulling the failed probe, engineers should document the current gap voltage reading from the monitor card front panel or from the System 1 condition monitoring software, as this baseline is essential for post-installation verification.
The extension cable — commonly a 3300 XL 5-metre or 9-metre armored cable — must be inspected for continuity and connector integrity before reuse. If the extension cable shows signs of insulation damage or connector corrosion, replacing it alongside the transducer prevents repeat failures. The combined probe-plus-extension cable system must match the total calibrated length for the Proximitor to deliver accurate output; mixing cable lengths from different system configurations will shift the sensitivity curve and trigger false alarms or missed trips.
For facilities running multiple measurement points on a single rack, the 3300 Rack and its associated I/O termination blocks should be audited during the same maintenance window. It is common to find that adjacent channels using older 330100 series probes or 330130 series probes are approaching end-of-life simultaneously. Proactively replacing these units during the same outage reduces future unplanned downtime. Similarly, if the rack includes a 3300/55 Dual Voting Trip Module or a 3300/46 Keyphasor Module, their wiring terminations and configuration parameters should be verified against the current machine protection logic before the system is returned to service.
Where the control architecture includes a DCS or safety system interface — for example, a Rockwell Automation ControlLogix or a Honeywell Safety Manager receiving 4–20 mA vibration signals from the 3300 monitor — the analog input card scaling and alarm setpoints should be confirmed unchanged after the transducer swap. If the facility is also planning a broader migration from the 3300 XL platform to the Bently Nevada 3500 Series, the 330104-00-19-05-01-CN can serve as an interim solution while the 3500/42M Proximitor I/O Module and new rack infrastructure are being procured and staged.
Downtime Control During System Migration
Minimizing production impact during a proximity transducer replacement begins with pre-staging all replacement components before the maintenance window opens. The 330104-00-19-05-01-CN should be bench-tested against a known-good Proximitor prior to installation to confirm output linearity and bias voltage. Having a calibrated gap-setting tool and a digital multimeter on hand allows the technician to set the probe gap to the specified 1.27 mm (50 mil) nominal and verify the −10 VDC bias output before the machine is restarted.
Where the process cannot tolerate a full shutdown, a temporary bypass of the affected channel — using the 3300/16 monitor card’s channel inhibit function — allows the machine to continue operating under reduced protection while the transducer is replaced. This approach must be formally authorized under the facility’s management of change (MOC) procedure and should be time-limited. The original program logic in the associated PLC or DCS should not be modified during this period; only the monitor card inhibit state changes, preserving the control narrative and HMI display integrity.
After installation, the system should be returned to normal protection status only after the gap voltage, direct vibration (1X), and overall vibration readings have been confirmed stable and within historical baseline ranges. If the facility uses a System 1 Evolution platform for online condition monitoring, the new transducer’s channel should be trended for at least one full machine start-stop cycle before the inhibit is removed and the channel is returned to trip-capable status.
Retrofit Support FAQ
Q: Is the 330104-00-19-05-01-CN a direct replacement for the standard 330104-00-19-05-01?
A: Yes. The -CN suffix denotes the country-of-origin designation for customs and compliance documentation. The mechanical dimensions, electrical specifications, and calibration parameters are identical to the standard 330104-00-19-05-01. No modifications to the Proximitor, extension cable, or monitor card are required.
Q: Do I need to recalibrate the 3300 XL Proximitor after installing this transducer?
A: Recalibration of the Proximitor itself is not required, as the 330104-00-19-05-01-CN uses the same sensitivity curve. However, the physical air gap must be reset to the specified nominal value (typically 1.27 mm / 50 mil) and verified by confirming the bias voltage output at the Proximitor. Any deviation beyond ±0.5 VDC from the nominal −10 VDC should be investigated before returning the channel to service.
Q: What pre-shipment testing is performed on this unit?
A: Each 330104-00-19-05-01-CN undergoes a functional output test confirming sensitivity, linearity, and bias voltage compliance before dispatch. A test report is available upon request. The unit is covered by a 12-month warranty against manufacturing defects from the date of shipment.
Q: Can this transducer be used in a 3500 Series rack as part of a platform upgrade?
A: The 330104-00-19-05-01-CN is designed and calibrated for the 3300 XL Proximitor system. While the 3500 Series uses compatible 8mm probe geometry, the 3500 platform requires transducers qualified for use with the 3500/42M or 3500/40M Proximitor I/O Modules. For a full platform migration to the 3500 Series, consult the Bently Nevada 3500 transducer selection guide to confirm the correct replacement SKU for your specific gap range and cable length requirements.
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