3300 XL 11 mm Proximity Probe – Heavy-Duty Shaft Monitoring

Key Technical Specifications

• Brand & Model: Bently Nevada 3300 XL 11 mm Proximity Probes – full part 330704-000-030-50-02-00.
• Linear Range: 2.0 mm (80 mils) typical for 11 mm probe systems.
• Incremental Scale Factor (ISF): 7.87 V/mm (200 mV/mil) with interchangeability error.
• Probe DC Resistance (5.0 m length): 7.2 ± 0.8 ohms from center conductor to outer conductor.
• Effects of 60 Hz Magnetic Fields (5m system): At 0.5 mm gap: 0.001 mV pp/gauss; At 2.5 mm gap: 0.009; At 4.6 mm gap: 0.027.
• Frequency Response: 0 to 10 kHz, +0, -3 dB typical with proper field wiring.
• Operating & Storage Temperature: -52°C to +177°C (-62°F to +351°F). Note: Exposing below -34°C may damage pressure seal.
• Probe Tip Material: Polyphenylene sulfide (PPS).
• Probe Case Material: AISI 304 stainless steel (SST).
• Probe Cable Type: 75 Ω triaxial, FEP insulated. Available lengths: 1, 5, or 9 meters.
• Probe Case Torque (M14x1.5): Maximum 63.3 N•m (560 in•lb); Recommended 21.1 N•m (187 in•lb).
• Maximum Thread Engagement (M14x1.5): 21 mm.
• Minimum Target Diameter: 15.2 mm (0.6 in) recommended for 11 mm probe.

Complete Suffix Information – Tree Structure

• 330704 = 3300 XL 11 mm Probe, M14 x 1.5 thread, with armor
  • ▪ 000 = Unthreaded Length Option: 00 mm
  • ▪ 030 = Overall Case Length Option: 30.0 mm
  • ▪ 50 = Total Length Option: 5.0 meters (16.4 feet) – use only with 5m Proximitor Sensor
  • ▪ 02 = Connector and Cable Type: Miniature coaxial ClickLoc connector, standard cable
  • ▪ 00 = Agency Approval Option: Not required

Installation & Mechanical Guidelines

• Thread type: M14 x 1.5 probe case – follow torque limits carefully.
• Recommended torque: 21.1 N•m (187 in•lb) for secure mounting.
• Maximum torque: 63.3 N•m (560 in•lb) – do not exceed this value.
• Thread engagement maximum: 21 mm (0.83 inches) for M14x1.5 threads.
• Field wiring recommendation: Use three-conductor shielded triad cable, 0.2 to 1.5 mm² (16 to 24 AWG).
• Maximum field wiring length: 305 meters (1000 feet) between Proximitor Sensor and monitor.
• Minimum bend radius (with armor): 25.4 mm (1.0 inch).

Environmental & Chemical Resistance

• Increased chemical resistance compared to standard probes – ideal for compressors.
• Pressure seal design: Viton O-ring seals differential pressure (not pressure tested before shipping).
• Temperature schedule (EPL Ga/Gc): T1 (-55°C to +232°C), T2 (-55°C to +177°C), T3 (-55°C to +120°C), T4 (-55°C to +80°C), T5 (-55°C to +40°C).
• For EPL Dc: T280°C at Ta -55°C to +232°C, T225°C at Ta -55°C to +177°C, and lower ratings for lower temperatures.
• Avoid prolonged exposure below -34°C (-30°F) to prevent premature pressure seal failure.

Frequently Asked Questions (FAQ)

• Can I use this 3300 XL 11 mm Proximity Probes with any Proximitor? No, the 5.0 meter probe requires the 5 meter Proximitor Sensor only.
• What is the recommended gap for 330704-000-030-50-02-00? Set the gap between 0.5 mm and 1.5 mm for best linear performance.
• Does this probe resist magnetic field interference? Yes, the 11 mm probe has low sensitivity to 60 Hz fields (max 0.027 mV pp/gauss at 4.6 mm gap).
• What cable type does this probe use? 75 Ω triaxial with FEP insulation – available in 1, 5, or 9 meter lengths.
• How do I request a pressure seal test? Contact Bently Nevada's custom design department for pressure seal testing.
• Can I use this probe below -34°C? Bently Nevada warns that temperatures below -34°C may cause premature pressure seal failure.

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