1. Start with the Failure Boundary

Do not begin by ordering the first readable model number. First decide whether the fault is in the probe, the probe-to-extension connection, the extension cable, the Proximitor Sensor, the field wiring, the monitor channel or the mechanical installation.

Maintenance rule: preserve the as-found reading, complete part numbers, wiring state, gap, channel configuration and visible condition before disconnecting any component.

2. Treat the Three Components as One Measurement Chain

Each component has a different job and a different ordering-code structure. The probe code describes items such as mounting thread, case geometry, total probe length, cable construction and approval option. The extension-cable code identifies cable length and construction. The Proximitor Sensor code identifies calibrated system length, mounting arrangement and approval option.

The base numbers matter. A suffix value on a probe does not necessarily mean the same thing on a 330130 extension cable. Decode every full part number against the ordering table for that component family.

3. Lock the Electrical System Length

For a system using an extension cable, the probe total length and extension-cable length must add up to the Proximitor Sensor's calibrated total system length. This is an electrical matching rule, not an estimate of the physical route through the machine or conduit.

For a detailed walk-through of probe and 330130 cable length codes, see Apter Power's 330130 cable-length matching guide. This replacement guide continues from that calculation into the mechanical, environmental and commissioning decisions.

4. Pass the Non-Length Matching Gates

A correct sum is only the first gate. Before releasing a replacement, compare every item below with the installed drawing, complete labels and current project requirements.

5. Build a Replacement Worksheet Before the RFQ

A useful worksheet lets maintenance, engineering, procurement and the supplier review the same installed chain. Record values rather than relying on phrases such as “standard probe,” “nine-metre cable” or “same as before.” For commercial planning, review Apter Power's industrial automation services.

6. Separate Supplier Checks from Site Acceptance

Supplier evidence confirms the offered component. Site acceptance confirms the installed measurement loop. Both are necessary, and neither substitutes for the other. Review Apter Power's part-condition definitions and warranty policy alongside the quotation.

Acceptance boundary: a component that powers up or passes a limited bench test is not yet proof that the installed probe-cable-Proximitor loop has the correct transfer behavior and monitoring-channel response.

7. Selected Bently Nevada 3300 XL Product Pages

The models below represent different points in the replacement chain. They are sourcing references, not a pre-approved kit. Match every complete code to the installed system before ordering. Each link opens an Apter Power product page in a new window.

8. Frequently Asked Questions

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