High‑Reliability 3300 NSv Proximity Probe

Key Technical Specifications

• Brand & Model: Bently Nevada · 3300 NSv Proximity Probe (part number 330910-00-10-50-02-00)
• Linear Range: 1.5 mm (60 mils) from 0.25 mm to 1.75 mm target gap; recommended static gap 1.0 mm (40 mils).
• Incremental Scale Factor (ISF): 7.87 V/mm (200 mV/mil) with +12.5% / –20% interchangeability tolerance.
• Deviation from Straight Line (DSL): Less than ±0.06 mm (±2.3 mils) over the full range.
• Frequency Response: 0 to 10 kHz (+0 / –3 dB) with up to 305 m (1000 ft) field wiring.
• Temperature Range: Operating & storage –52°C to +177°C (–62°F to +351°F).
• Environment & Pressure: Viton O‑ring seals differential pressure; PPS tip, AISI 304 stainless steel case.
• Interference Immunity: 75 Ω coaxial FEP cable with fluoroethylene propylene insulation; miniature coaxial ClickLoc connector ensures reliable signal transmission.

Complete Suffix Information (Part Number Breakdown)

330910   = 3300 NSv Probe, M10×1 thread, with armor
    -00   = 0 mm unthreaded length
      -10 = 100 mm overall case length
        -50 = 5.0 meters (16.4 ft) total length
          -02 = Miniature coaxial ClickLoc connector, standard cable
            -00 = No agency approval required

Electrical Characteristics & Wiring

• Probe DC resistance (5.0 m length): 5.3 ±0.7 Ω (center‑to‑outer conductor).
• Extension cable resistance: center 0.220 Ω/m, shield 0.066 Ω/m.
• Extension cable capacitance: 69.9 pF/m (21.3 pF/ft) typical.
• Field wiring: 0.2‑1.5 mm² (16‑24 AWG); recommend three‑conductor shielded triad. Max length 305 m (1000 ft) to proximitor.
• Output signal: –1 to –13 Vdc over linear range (0.25 to 1.75 mm).

Frequently Asked Questions (FAQ)

• Q: Is this probe compatible with older 3300 RAM systems?
  A: Yes, the 3300 NSv Proximity Probe is mechanically and electrically interchangeable with the previous 3300 RAM probe and extension cable.
• Q: Can I use it in a process compressor?
  A: Absolutely. The NSv version offers increased chemical resistance compared to the RAM series, making it ideal for compressor applications.
• Q: What is the recommended field wiring distance to the monitor?
  A: You can run up to 305 meters (1000 feet) of triad cable between the proximitor and the monitor without significant signal degradation.
• Q: Does the probe require pressure testing before use?
  A: Standard probes are not pressure tested. Contact Bently Nevada custom design if your application needs a validated pressure seal.
• Q: How do I verify the correct gap?
  A: Set the static gap to 1.0 mm (40 mils) for nominal operation within the linear range (0.25‑1.75 mm).

Author: Ubest Automation

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