Bently Nevada 330103-01-06-05-02-00 3300 XL 8 mm Proximity Probe

330103-01-06-05-02-00: An M10x1-Mounted 3300 XL 8 mm Probe for Tight Holders

The distinguishing mechanical decision in this part number is the thread: M10x1 rather than the 3/8-24 UNF used across most of the 330101 range. That single segment determines whether the probe can be fitted to an existing probe holder or whether the holder has to be replaced with a different mounting standard. On European-standard machine bases and on retrofit programs where the holder pattern came from an older non-Bently design, this is the variant that drops in.

The second distinguishing segment is 01 in position three, which is the case-length option for this variant, paired with a 0.5 m total length. Maximum thread engagement is 15 mm and the case thread is M10x1, so the mounting torque spec is different from the UNF variants and must be observed.

The temperature range is -52 °C to +177 °C (-62 °F to +350 °F), which covers steam turbine casings and most compressor applications. Recommended gap setting is -9 Vdc, and probe case torque for a standard forward-mounted installation is 11.2 N·m (100 in·lbf) recommended with 33.9 N·m (300 in·lbf) maximum.

Where the M10x1 Variant Fits and Where the UNF Ones Do Not

Probes within the 330103 family share the PPS tip and stainless case construction but split on thread standard. Match the thread to the holder already in the machine before ordering:

All Bently Nevada parts · Sensors & Instrumentation · 330101 (3/8-24 UNF class)

Mounting Torque and Thread Engagement

Do not exceed 15 mm of thread engagement. For a standard forward-mounted probe case the recommended torque is 11.2 N·m (100 in·lbf) with 33.9 N·m (300 in·lbf) as the absolute maximum. Over-torquing the case is the most common cause of a case-to-thread seal that will not hold differential pressure, and the 3300 XL probes are not field-repairable when that happens.

Field wiring runs 0.2 to 1.5 mm² (16 to 24 AWG) with a maximum run of 305 m (1000 ft) when field wiring is used.

Why Premature Failure Is the Expensive Outcome

A proximity probe that is not in its specified gap range will read erratically long before it fails outright, and on a turbine or compressor that translates into nuisance trips followed by the real failure the machine was supposed to warn about. The PPS tip resists wear in high-speed applications where a softer tip would erode, and the 2 mm linear range captures shaft motion accurately across the start-up and coast-down range where transient behaviour matters most.

When intrinsically safe zener barriers per drawing 141092 or galvanic isolators are used, the probe installation is rated Class I — confirm the barrier arrangement against the drawing before commissioning.

Verification Before Ordering

Confirm three mechanical facts against the probe being removed: M10x1 thread, 15 mm or less thread engagement, and the total length your cable route can accommodate. The 0.5 m total length on this variant is the full probe assembly run — a longer route needs a different variant rather than an extension.

Supply & terms: Stock status: In Stock · Condition: New · Warranty: One Year · Origin: US. Listed by AutoDCS Tech Parts Team · Last updated 2026-10-07.

330101-00-84-20-02-CN · 330102 proximity probe · Bently Nevada brand hub