Bently Nevada 330104-00-21-10-02-CN 3300 XL Spare Part

Overview

Bently Nevada 330104-00-21-10-02-CN 3300 XL Proximity Transducer: Maintenance-Proven Spare Part for Factory Uptime

The Bently Nevada 330104-00-21-10-02-CN is a 25 mm proximity transducer designed for the 3300 XL continuous vibration monitoring system — one of the most widely deployed machinery protection platforms in rotating equipment facilities worldwide. Whether you are managing a planned annual overhaul, responding to an unplanned trip event, or building a strategic spare parts inventory for a turbine, compressor, or pump train, this transducer represents a critical line item in any maintenance-ready cabinet.

Sourced as an original spare, the 330104-00-21-10-02-CN is fully compatible with the Bently Nevada 3300 XL monitor series and integrates directly with the standard Proximitor® sensor signal conditioning chain. Its 25 mm tip diameter, 5-metre integral cable, and -24 VDC operating range make it a direct field replacement for worn or damaged transducers without requiring recalibration of the monitor rack — a key advantage when minimising mean time to repair (MTTR) during a production-critical shutdown.

Spare Maintenance Table

Maintenance Planning for Continuous Operation

When a proximity transducer such as the 330104-00-21-10-02-CN is flagged during a routine control cabinet inspection or a vibration trend review, experienced maintenance engineers know that the transducer itself is rarely the only component that warrants attention. A systematic replacement workflow should include verification of the associated Bently Nevada 3300 XL Proximitor® Sensor (typically the 330180-X1-05 or equivalent), which conditions the raw eddy-current signal before it reaches the monitor card. A degraded Proximitor can produce erratic gap voltage readings even after a new transducer is installed, leading to repeat trips and unnecessary downtime.

The 3300 XL monitor card in the rack — such as the 3300/16 or 3300/20 dual-channel vibration monitor — should also be inspected for alarm setpoint integrity and channel health. If the monitor has been in service for more than five years without a bench calibration, scheduling a calibration check alongside the transducer swap is a cost-effective use of the planned outage window. Similarly, the rack power supply module (e.g., Bently Nevada 3300/05 or equivalent) should be verified for output voltage stability, as a sagging -24 VDC rail is a common root cause of false proximity alarms that are often misdiagnosed as transducer failure.

Cabling integrity is another frequently overlooked element. The coaxial extension cable connecting the transducer to the Proximitor — often a 330130-series armoured extension cable — should be inspected for jacket damage, connector corrosion, and continuity. In high-vibration environments, cable fatigue at the conduit entry point is a known failure mode. Replacing the transducer without inspecting the extension cable can result in a repeat fault within weeks.

For facilities running integrated machinery protection with a System 1® Evolution software platform, the transducer replacement should be followed by a database point verification to confirm that the new sensor’s gap voltage and sensitivity constants are correctly entered. Incorrect sensitivity values entered after a transducer swap are a documented source of false high-vibration trips during post-maintenance run-up.

Procurement engineers building a strategic spare parts list for a 3300 XL-equipped machine train should consider stocking the 330104-00-21-10-02-CN alongside the Proximitor sensor, at least one spare monitor card, and a set of terminal block connectors and field wiring accessories appropriate for the rack I/O termination. This approach ensures that any single-point failure in the measurement chain can be resolved within one shift, without waiting for expedited freight.

Site Replacement Workflow

Step 1 — Isolation and Safety: Follow your site’s lock-out/tag-out (LOTO) procedure for the affected measurement channel. Confirm with the control room that the monitor channel is bypassed or inhibited before disconnecting the transducer to avoid a spurious trip signal.

Step 2 — Gap Voltage Verification: Before removing the old transducer, record the existing gap voltage reading from the monitor front panel or System 1® display. This baseline helps confirm that the new 330104-00-21-10-02-CN is installed at the correct gap distance (typically 1.0–1.5 mm for a 25 mm transducer on a steel target).

Step 3 — Transducer Removal and Inspection: Remove the old transducer and inspect the probe tip for pitting, contamination, or mechanical damage. Inspect the target area on the shaft for runout anomalies or surface damage that could affect the new transducer’s linear range.

Step 4 — Installation: Install the 330104-00-21-10-02-CN using the correct thread engagement and locking hardware per the Bently Nevada installation drawing. Set the gap to the specified value using a calibrated gap-setting tool or feeler gauge, then verify the gap voltage at the Proximitor output terminal.

Step 5 — Functional Check: With the channel reinstated, confirm that the vibration reading is within the expected baseline range for the machine at rest and during run-up. Document the as-left gap voltage and vibration reading in the maintenance management system (CMMS) for future reference.

This workflow is applicable to direct replacement of legacy 330104-series transducers and supports backward compatibility with existing 3300 XL monitor racks without firmware or configuration changes — a significant advantage for facilities managing older systems where platform upgrades are not yet budgeted.

Spare Parts Support FAQ

Q1: Is the 330104-00-21-10-02-CN a direct drop-in replacement for other 330104-series variants?
The 330104 series shares the same 25 mm tip diameter and -24 VDC operating range across most variants, but the suffix codes indicate differences in cable length, connector type, and temperature rating. The -00-21-10-02-CN variant features a 5 m cable with a CN coaxial connector. Before ordering, confirm that your existing Proximitor and extension cable are compatible with the CN connector type. If your installation uses a different connector suffix, contact our sales team to confirm the correct variant for your application.

Q2: What testing is performed before shipment?
Each 330104-00-21-10-02-CN unit is inspected for physical integrity and verified for output voltage response prior to shipment. Units are packaged in anti-static, shock-resistant packaging to protect the coaxial connector and probe tip during transit. A test report is available upon request for critical applications.

Q3: What does the support terms confirmed by quotation cover?
The support terms confirmed by quotation cover manufacturing defects and verified functional failures under normal operating conditions as specified in the Bently Nevada 3300 XL installation manual. It does not cover damage resulting from incorrect installation, mechanical impact, or operation outside the rated temperature and voltage range. Support requests are processed with a return merchandise authorisation (RMA) and typically resolved within 10 business days.

Q4: Can you support long-term or blanket purchase orders for this part?
Yes. For facilities with multiple 3300 XL-equipped machine trains or multi-site maintenance programmes, we support blanket purchase orders, consignment stock arrangements, and scheduled delivery programmes. Long-term supply agreements help procurement engineers lock in pricing, reduce lead time risk, and maintain a compliant spare parts inventory without tying up excessive working capital in on-site stock.

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Product Identification

Brand / Ecosystem

Bently Nevada
Bently Nevada

Model / Series

330104-00-21-10-02-CN
Bently Nevada 3300 XL / 3301 Series

Product Family

Sensors

Availability Status

Available on request after model and quantity confirmation

Inquiry Type

B2B RFQ, replacement inquiry and project spare-part request

Pre-Quote Check

Exact SKU, brand, series, quantity, nameplate photos and destination country are checked before quotation

Specification & Inquiry Focus

Sensor range

Photoelectric, proximity and process sensors

Common needs

Output type, distance and connector

Project support

Machine detection and replacement inquiry

Inquiry Support

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

What to Send Us

• Brand and exact model number: Bently Nevada 330104-00-21-10-02-CN
• Quantity and required delivery time
• Application, replacement requirement or nameplate photo
• Destination country and shipping preference