Bently Nevada 330195-02-12-50-CN Replacement Probe 3300 XL

Product Overview

Bently Nevada 330195-02-12-50-CN Replacement Probe 3300 XL: Seamless Transition & Legacy System Compatibility

When your rotating machinery monitoring system depends on the Bently Nevada 3300 XL Series, an unplanned probe failure or end-of-life notification can threaten continuous production. The 330195-02-12-50-CN is an 8mm Eddy Current proximity probe with reverse-mount (CN) cable configuration, designed for radial vibration, axial position, and speed measurement on turbines, compressors, pumps, and motors. This listing provides a verified, ready-to-ship replacement and upgrade solution for facilities migrating away from discontinued or aging 3300 XL probe assemblies.

Whether you are replacing a failed unit, building a critical spare inventory, or executing a planned migration from an older Bently Nevada 7200 Series or 3300/5 Series installation to the current 3300 XL platform, this probe is engineered for direct physical and electrical compatibility. The 8mm tip diameter, 0.5m (50 cm active cable) armored cable, and reverse-mount connector orientation match the original factory specification, eliminating the need for field wiring modifications or conduit rerouting during swap-out.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful migration from a legacy vibration monitoring system to the 3300 XL platform rarely involves a single component. In practice, field engineers replacing the 330195-02-12-50-CN probe will also evaluate the condition of the paired 330130-080-00-00 extension cable, which carries the high-frequency eddy current signal from the probe tip back to the proximitor module. If the extension cable jacket shows cracking or moisture ingress, it should be replaced simultaneously to avoid a repeat outage.

The proximitor itself — typically a 330180-X1-CN 3300 XL 8mm Proximitor — should be bench-tested against the new probe before installation. In older 3300/16 Proximitor installations, a full proximitor swap to the 330180 series is recommended to maintain system accuracy and avoid calibration drift. The proximitor mounts directly into the existing 3500/42M Proximitor I/O Module slot on the 3500 rack, requiring no rack hardware changes.

For facilities running a Bently Nevada 3500 Series rack-based monitoring system, the 3500 rack backplane and power supply module — such as the 3500/15 Power Supply — should be inspected during any probe replacement outage. A degraded rack power supply can cause false vibration alarms even after a successful probe swap. Similarly, the 3500/22M Transient Data Interface module, if installed, should be verified for firmware compatibility with the replacement probe’s output range.

When migrating from a standalone 7200 Series installation to a fully integrated 3500 rack architecture, engineers often add a 3500/32 4-Channel Relay Module to automate trip logic previously handled by discrete relay panels. This is also an appropriate time to review the 3500/92 Communication Gateway Module configuration, particularly if the plant DCS communicates via Modbus RTU or OPC-DA — both of which are natively supported without additional hardware.

For sites where the probe is installed in a hazardous area (Zone 1 or Zone 2), a Bently Nevada 3300 XL Barrier or equivalent Zener barrier should be verified for current rating compatibility with the new probe. Signal isolators from the 3300 XL accessory range can be inserted between the proximitor output and the DCS analog input card — whether that DCS is an Emerson DeltaV, Honeywell Experion, ABB 800xA, or Siemens PCS 7 system — to eliminate ground loop interference, a common source of noise complaints during post-migration commissioning.

Retrofit Guidance FAQ

Q: Can I install the 330195-02-12-50-CN directly in place of my existing 7200 Series 8mm probe without rewiring?
A: In most cases, yes — provided the extension cable connector type matches. The CN (reverse mount) designation refers to the probe-to-extension cable connector orientation. Verify your existing extension cable termination before ordering. If your current extension cable is a standard (non-CN) type, you will need a CN-compatible extension cable such as the 330130-080-00-CN.

Q: Do I need to recalibrate the 3500 rack after replacing the probe?
A: A gap voltage check and scale factor verification are recommended after any probe replacement. Use a Bently Nevada calibration fixture or a precision micrometer stand to set the probe gap to the nominal -10.0 VDC output at the specified gap distance (typically 1.0 mm for 8mm probes). The 3500/42M module retains its configuration in non-volatile memory, so no software reconfiguration is required.

Q: Is the 330195-02-12-50-CN compatible with Modbus or PROFIBUS communication?
A: The probe itself is an analog sensor and does not communicate digitally. Protocol compatibility is determined by the 3500 rack communication module (e.g., 3500/92 for Modbus/OPC). No changes to the communication architecture are required when replacing the probe.

Q: What is the physical installation clearance requirement?
A: The 8mm probe body requires a standard M10×1 threaded probe boss. The reverse-mount cable exits from the back of the probe housing, which is advantageous in tight conduit or junction box installations where a forward-exit cable would conflict with adjacent piping or structural steel.

Q: Can this probe be used with a non-Bently Nevada DCS or safety system?
A: Yes. The ±24V analog output is industry-standard and compatible with most DCS analog input cards, provided the input card is configured for the correct voltage range and the proximitor is powered from an appropriate ±24 VDC supply.

Warranty Assurance

Every 330195-02-12-50-CN unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to shipment, each probe assembly undergoes output voltage verification, cable continuity testing, and connector integrity inspection. Units that do not meet Bently Nevada factory output specifications are quarantined and not listed for sale.

In the event of a warranty claim, TOPNLMS provides a replacement unit dispatch within 3 business days of claim confirmation, with no requirement to return the defective unit for claims under standard failure modes (open circuit, output out of range, physical damage in transit). For complex field failures, our technical team — reachable at [email protected] or +86 18359293191 — will coordinate remote diagnosis before initiating a replacement.

Procurement teams can request a Certificate of Conformance, packing list, and commercial invoice for customs clearance. Express shipping (DHL / FedEx) to most destinations is available with typical transit times of 3–7 business days from Xiamen, China.

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