Bently Nevada 330851-02-000-070-10-00-05 3300 XL 25 mm Proximity Probe

Technical Specifications
  • Probe Tip Diameter: 25 mm
  • Thread Type / Length: M30×2 / 70 mm case
  • Unthreaded Length: 0 mm
  • Overall Case Length: 70 mm
  • Cable Length: 1.0 m (3.3 ft) 75 Ω triaxial PFA FluidLoc
  • Cable Armor: None
  • Sensitivity: 0.787 V/mm (20 mV/mil) ±1 %
  • Linear Range: 12.7 mm (500 mil)
  • Probe Resistance: 6.2 Ω ±0.5 Ω @ 20 °C
  • Tip Material: PEEK (steam resistant)
  • Temperature Range: –35 °C to +200 °C continuous, +250 °C peak <24 h
  • Ingress Protection: IP67 when properly installed
  • Torque Rating: 68 N·m (50 ft·lb) recommended, 163 N·m (120 ft·lb) maximum
  • Weight: 230 g (8.1 oz) unarmored
  • Agency Approvals: ATEX, IECEx, CSA, TR CU, FCC Part 15, ABS Marine, RoHS, REACH
Category:
Description
Functional Highlights
  • Extended 70 mm Case: Provides extra thread engagement for thick casings or spacer blocks.
  • FluidLoc® Cable: Blocks oil migration along cable core, eliminating fire hazard and tank drain-back.
  • ClickLoc Connector: Gold-plated, self-locking interface rated for 1 000 mate cycles under 50 g vibration.
  • Front & Back Sealing: Prevents moisture ingress during steam-wash cycles and long outages.
  • High-Tip Temperature Rating: Continuous 200 °C operation with 250 °C short-term peak tolerance.
  • Direct Retrofit: Mechanical and electrical match for 7200-series 25 mm and 35 mm probes; no monitor re-span required.
  • EMC Immunity: Exceeds EN 61000-6-2/4 heavy-industrial levels without extra shielding.
Application Scenarios
  • Steam-turbine generator differential expansion (DE) and rotor expansion monitoring
  • Gas-turbine compressor coupling float and casing growth surveillance
  • Large hydro-turbine axial position and thrust-bearing wear measurement
  • High-pressure feed-water pump thrust-collar thermal growth tracking
  • Refinery catalytic cracking unit regenerator air-blower shaft expansion
  • Nuclear reactor coolant pump shaft expansion and vessel differential growth
  • Steel mill blast-furnace turbo-blower stator-to-rotor expansion measurement

Ordering Information
330851-02-000-070-10-00-05 decodes as:
330851 = 3300 XL 25 mm proximity probe family
02 = M30×2 threaded case
000 = 0 mm unthreaded length
070 = 70 mm overall case length
10 = 1.0 m cable length
00 = no armor
05 = multiple agency approvals
Installation Notes
Install with recommended 68 N·m torque; use anti-seize on threads; maintain minimum 25 mm bend radius on cable; ground shield at Proximitor end only; verify 0.787 V/mm sensitivity with 127 µm (5 mil) shim during commissioning.
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