The 330851-04-00-27-10-01-00 is supplied as a Bently Nevada 3300 XL 25 mm proximity probe marking. Official Datasheet 163236 identifies 330851 as the 25 mm probe family and case option 04 as a smooth 1.06 in diameter side-exit case; the remaining shortened groups are retained exactly as supplied and are not normalized.
- 3300 XL 25 mm proximity probe
- Smooth 1.06 in diameter side-exit, option 04
- 12.7 mm (500 mil)
- 0.787 V/mm (20 mV/mil)
In a complete 3300 XL 25 mm system, the probe senses distance to a conductive turbine collar or ramp. The matched extension cable and 3300 XL 25 mm Proximitor Sensor convert that gap into a voltage used for differential-expansion monitoring on mid-size and large steam turbine generators.
Important Notice: Keep the supplied complete marking unchanged and verify nonstandard, placeholder, legacy, or MOD-controlled fields against the physical nameplate and current official documentation.
Apter Power 330851-04-00-27-10-01-00 Manuals and Guides
Important Notice: These are two separate Apter Power documents prepared from the official Bently Nevada source named in each document. Confirm the physical nameplate, current manufacturer documentation, and applicable installation or modification drawing before installation or replacement.
Steam Turbine Differential Expansion
Tracks relative axial growth between the rotor and casing
Collar Measurement
Observes one or both sides of a suitable collar
Ramp Measurement
Supports longer differential-expansion measurement arrangements
High-Temperature Turbine Areas
Uses the 25 mm family FluidLoc and high-temperature construction
- Do not reinterpret the shortened 00 and 27 groups as current three-character dimensional codes without evidence
- Replace the probe, extension cable, and Proximitor Sensor together when migrating from older 25 mm systems
- Set alignment and gap using the official sliding-bracket or machine procedure
- Protect ClickLoc connectors from contamination and observe the 25.4 mm minimum bend radius
- Verify approval markings and the physical case geometry before installation
The current official order format is 330851-AA-BBB-CCC-DD-EE-FF. The supplied 00 and 27 groups are shorter than the current three-character B and C fields, so their dimensional meaning is not inferred.
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