330104-00-15-05-02-00 Bently Nevada 3300 XL 8 mm Proximity Probe

The Bently Nevada 330104-00-15-05-02-00 shows up mainly on heavy rotating machinery where non-contact measurement is required. Think steam turbines, gas turbines, centrifugal compressors, and large industrial fans.

Most of the time it’s sitting around fluid-film bearings, tracking radial vibration and axial displacement. It also gets used as a Keyphasor probe or speed reference, especially in high-speed shafts where timing matters more than people expect.

It’s not a standalone part. The probe works together with a 3300 XL extension cable and a Proximitor sensor.

Because this model already has a 0.5 m integral cable, the rest of the loop depends on system length:

• 5.0 m setup → 4.5 m extension cable
• 9.0 m setup → 8.5 m extension cable

In most cases the system is tuned around a steel target (usually AISI 4140), so the voltage output stays consistent for vibration monitoring in the Bently Nevada 3500 system.

The stainless steel armor (AISI 302/304) is basically there for mechanical protection. In turbines or compressors, cables get hit by vibration, light rubbing, sometimes debris in the casing—nothing unusual in those environments.

So the armor just takes that abuse instead of the inner signal line. It’s not doing anything fancy. Sealing is still handled by the Viton O-ring, and temperature range stays around -52°C to +177°C, so the probe keeps working through normal thermal cycling without drifting much.

Yes, in normal cases. The design follows API 670 interchangeability rules, so swapping one probe for the same model usually doesn’t require recalibrating the full loop.

In practice, technicians just replace the probe and keep the same Proximitor sensor scale factor, assuming the rest of the system hasn’t been modified.

Loop check usually starts right at the Proximitor sensor. Technicians look at the DC gap signal first, often sitting around -9 Vdc in a normal radial vibration setup. Nothing complicated there, just a quick stability check.

If the reading looks unstable, next step is simple—unplug the ClickLoc connector and do a basic continuity check on the conductors. Inner to outer, see if anything is broken or inconsistent.

From there, they can quickly tell if the issue is coming from the probe side or the cable side before going into deeper troubleshooting.