Bently Nevada 330130-040-03-00 3300 XL 8mm Proximitor Sensor Extension Cable with 75 Ω Triaxial Cable 4.0 Metres Length and ClickLoc™ Connectors

The 330130-040-03-00 is basically one defined build inside the Bently Nevada 3300 XL 8mm proximity transducer system. Nothing random here—each part of the code tells you something specific.

330130 is the base extension cable for the 3300 XL series.
“-040” is the cable length, set at 4.0 meters (about 13.1 ft), so it’s not adjustable, it’s fixed at order stage.
“-03” is where the mechanical protection comes in—this is the armored version, stainless steel (AISI 302/304) with flexible structure and added connector protection.
“-00” just means no special hazardous area approvals attached to this variant.

In field practice, checking all digits really matters. One small mismatch and you’re no longer in full alignment with the machinery protection setup, especially in API 670 systems or rotating equipment monitoring lines.

Yes, electrically it’s fully interchangeable with the normal 3300 XL 8mm components. So you can pair it with standard proximity probes and Proximitor sensors without issues. It still uses the same 75 Ω triaxial structure and ClickLoc™ connectors, so from a signal point of view there’s no real difference. That’s why people often swap armored and non-armored versions depending on site conditions. The only thing to watch—and this is where mistakes usually happen—is total system length. Probe + extension cable + sensor calibration length has to match what the Proximitor system expects.

You’ll mostly see the 330130-040-03-00 in API 670 compliant machinery protection systems. Power plants, oil & gas facilities, petrochemical units—anywhere with rotating equipment running continuously. Steam turbines, gas turbines, centrifugal compressors, turbo-expanders, pumps… basically all the critical rotating assets.

What it’s really doing is carrying eddy current signals for things like:

• fluid-film bearing vibration monitoring
• turbine shaft displacement
• radial vibration tracking
• compressor eccentricity monitoring

The armored structure just helps it survive in harsh layouts where vibration, oil exposure, and physical contact are pretty normal.

There are a couple of practical limits that installers usually care about more than anything else. First is bending. The 330130-040-03-00 shouldn’t be bent tighter than about 25.4 mm radius (1 inch). If it’s forced tighter than that, you risk damaging the triaxial shielding and that can affect impedance stability—something you don’t want in measurement signals.Second is pulling force. The ClickLoc™ connectors are strong enough (around 270 N rating), but in real installation work you don’t want to stress them. Most damage in the field actually happens during pulling and routing, not during operation. Connector protectors should stay on whenever possible, especially in dirty or humid environments. It’s a small detail but it helps long-term reliability.

The 330130-040-03-00 doesn’t go straight into the 3500 rack—that’s a common misunderstanding. It sits between the probe and the Proximitor Sensor in the 3300 XL system. So the flow is basically: Probe → 330130-040-03-00 extension cable → Proximitor Sensor → 3500/40M monitor module

The sensor converts the eddy current signal into a usable voltage signal, and only then does the 3500 system process it for monitoring or protection logic. In practice, this separation is intentional. It keeps signal conditioning stable and ensures the vibration data used for shutdown logic or machinery protection stays clean and consistent.