330909-00-80-70-02-00 Proximity Sensor Bently Nevada 3300 NSv 7m Armor

Product Overview

The 330909-00-80-70-02-00 is a precision-engineered 3300 NSv Proximity Probe manufactured by Bently Nevada. Specifically designed for tight clearance applications where standard probes cannot fit, this 330909 model features a 3/8-24 UNF thread and integrated stainless steel armor for superior mechanical protection. It excels in monitoring vibration and position on small-diameter shafts, utilizing a high-frequency response to capture minute target movements in high-performance machinery.

Configuration Breakdown

• 330909 — Base Model: 3300 NSv Probe (3/8-24 UNF)
  • 00 — Unthreaded Length: 0.0 inches
    • 80 — Overall Case Length: 8.0 inches
      • 70 — Total Length: 7.0 meters (23.0 feet)
        • 02 — Connector/Cable: ClickLoc Miniature Coaxial with Armor
          • 00 — Approval: Not required (Standard application)

Technical Specifications

• Brand: Bently Nevada / Baker Hughes
• Model: 330909-00-80-70-02-00
• Series: 3300 NSv Proximity Transducer System
• Case Material: AISI 304 Stainless Steel (SST)
• Tip Material: Polyphenylene Sulfide (PPS)
• Cable Type: 75 Ω coaxial, FEP insulated with stainless steel armor
• DC Resistance: Center to Outer Conductor (7.0m) = 5.9 ± 0.9 ohms
• Operating Temperature: -52°C to +177°C (-62°F to +351°F)
• Pressure Sealing: Viton O-ring for differential pressure sealing
• Mounting Torque: 11.3 N•m (100 in•lb) Recommended
• Maximum Thread Engagement: 0.563 inches
• Total Weight: Approx. 14 to 150 g (dependent on armor configuration)

Global PLC Spare HUB's Insight

The 330909-00-80-70-02-00 is the "problem solver" for centrifugal compressors and small turbines. While standard 5mm or 8mm probes struggle with small target surfaces, the NSv (Narrow Side View) technology allows the 330909 to maintain high linearity even when counterbore clearances are minimal. The 7-meter total length on this specific configuration is ideal for large frame machines where the Proximitor sensor must be mounted in a remote junction box far from the bearing housing.

Application Scenarios & Compatibility

• Small Shaft Vibration: Monitoring radial vibration on shafts smaller than 76 mm (3 in).
• Thrust Measurement: Axial position monitoring in tight bearing housings.
• Compatible Systems: Specifically designed for use with the 3300 NSv Proximitor and extension cables.
• Industrial Use: High-speed turbochargers, small steam turbines, and radial magnetic bearings.

Diagnostics & Performance

• Frequency Response: Optimized for high-speed rotors where standard probes suffer from "side-view" interference.
• Scale Factor Maintenance: Recommended minimum counterbore of 13 mm (0.5 in) ensures Average Scale Factor (ASF) remains consistent.
• Seal Integrity: The Viton O-ring prevents oil migration through the probe case, though sustained temperatures below -34°C can affect seal longevity.

Shipping & Warranty

• Warranty: 12-month comprehensive quality guarantee.
• Shipping: Worldwide express via FedEx, UPS, or DHL.
• Handling: Ships within 24 to 48 hours from stock.
• Origin: Genuine Made in U.S.A.

Selection Guide

• Armor Choice: The "02" option provides ClickLoc armor, essential for areas with high mechanical debris or where cable routing isn't protected by conduit.
• Length Matching: Always ensure the total length (7.0m) matches your Proximitor calibration; mismatched lengths will result in significant measurement errors.

Expert FAQ

What is the impact of using a counterbore smaller than 13mm with the 330909?

Small counterbores cause "side loading" where the probe sees the walls of the hole. This typically reduces the linear range and changes the scale factor at wider gaps.

Can the 7.0m cable be cut to a shorter length for a cleaner installation?

Never cut the probe cable. The capacitance and resistance are critical for the Proximitor's oscillation circuit calibrated for the 7m system.

What does the "ClickLoc" connector offer over standard connectors?

The ClickLoc (Option 02) provides a tactile "click" ensuring a secure, vibration-resistant connection that prevents signal intermittent faults common in high-vibration machinery.

Is the 330909-00-80-70-02-00 pressure-rated for submerged oil applications?

While it features a Viton O-ring seal, these probes are not individually pressure-tested at the factory. It is designed for differential pressure but not high-pressure immersion without secondary housing.

How do I verify the health of the probe without a Proximitor?

Use a high-precision multimeter to check the resistance between the center pin and the outer shield. For this 7m model, it should read between 5.0 and 6.8 ohms.

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