Bently Nevada 330850-90-05 3300 XL 25 mm Proximitor Sensor

Technical Specifications
  • System Length: 9.0 m (29.5 ft) total probe + extension + Proximitor
  • Sensitivity: 0.78 V/mm (20 V/mil) ±1 % at –24 Vdc supply
  • Linear Range: 2 mm to 27.9 mm (80 mil to 1 100 mil) gap
  • Supply Voltage: –17.5 Vdc to –26 Vdc (barrier-free); –23 Vdc to –26 Vdc (with barriers)
  • Supply Current: 12 mA typical, 15 mA maximum
  • Output Resistance: 50 Ω
  • Frequency Response: 0 Hz to 10 kHz (–3 dB)
  • Temperature Drift: <0.05 %/°C over –35 °C to +65 °C operating range
  • Storage Temperature: –51 °C to +100 °C
  • Housing Material: A380 aluminum with iridite finish
  • Weight: 0.6 lb (0.27 kg)
  • Mounting: Panel-mount standard; DIN-rail (35 mm) via optional clip
  • Connector: ClickLoc gold-plated, self-locking, accepts 3300 XL 25 mm probe and extension cable
  • Agency Approvals: CE, ATEX, IECEx, CSA, TR CU, RoHS, REACH
Category:
Description
Functional Highlights
  • Longest Linear Range: 27.9 mm span eliminates the need for multiple probes on large steam-turbine casings.
  • ClickLoc Connector System: One-hand, finger-tight mating eliminates loosening under 50 g vibration; rated for 1 000 mate cycles.
  • Integrated Linearization: Digital correction removes mid-range non-linearity, delivering ±0.2 % full-scale accuracy without external calibrator.
  • Barrier-Ready Output: Output stage designed for –24 Vdc two-wire intrinsic safety barriers; no external isolator required.
  • Hot-Swap Capability: Module can be replaced while loop is powered; auto-recalibrates when used with 3500/22M or 1701 FieldMonitor racks.
  • RFI/EMI Immunity: Exceeds EN 61000-4-3 level 3 (10 V/m) and 4-6 level 4 (30 A/m) without additional shielding.
  • Cross-System Compatibility: Drop-in replacement for legacy 7200-series 25 mm and 35 mm systems; re-uses existing probes and cables.
Application Scenarios
  • Steam-turbine generator differential expansion and rotor expansion monitoring
  • Large hydro-turbine axial position and thrust-bearing wear measurement
  • Gas-turbine compressor coupling float and casing growth surveillance
  • High-pressure feed-water pump thrust collar position and 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
330850-90-05 decodes as:
330850 = 3300 XL 25 mm Proximitor family
90 = 9.0 m system length, panel mount
05 = Multiple agency approvals
Installation Notes
Mount Proximitor within 9 m of probe tip; maintain –24 Vdc supply regulation better than 50 mV; ground shield at rack end only; torque ClickLoc to finger-tight plus 1/8 turn; verify 0.78 V/mm sensitivity with 127 µm (5 mil) shim stock during commissioning.
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