Configured for signal generation in turbine supervisory instrumentation layouts, the Bently Nevada 330908-00-20-70-02-05 (330908-00-20-70-02-05 Proximity Probe) provides direct physical and electrical execution for machinery shaft vibration monitoring.

Model Matrix And Suffix Breakdown

• Base Model: 330908 - 3300 NSv Probe
• Unthreaded Length Option: 00 - 0.0 in minimum unthreaded length
• Overall Case Length Option: 20 - 2.0 in minimum case length
• Total Length Option: 70 - 7.0 meters (23.0 feet) cable length
• Connector and Cable Option: 02 - Miniature coaxial ClickLoc connector, standard cable
• Agency Approval Option: 05 - Multiple Approvals

Hardware Specifications

Rotor Dynamics And Eddy-Current Proximity Transducer Performance

The transducer assembly operates using an eddy-current probe scaling mechanism to detect tiny spatial variations between the probe tip and a rotating metallic target. Precise rotor dynamics analysis requires proper gap voltage validation, targeting an initial operating voltage window between -9 V and -11 V DC when the shaft sits in its centered position. System design relies on robust cross-talk suppression and matched cable impedances to prevent signal distortion across long signal runs connected to the Proximitor monitor.

Ordering Information

• 1 x 330908-00-20-70-02-05 3300 NSv Proximity Probe (3/8-24 UNF thread, unarmored build, 0.0 in unthreaded length, 2.0 in case length, 7.0 meters cable with ClickLoc connector)

Field Installation Guidelines

• Mechanical Mounting: Fasten the 3/8-24 UNF threaded probe body into the mounting bore, applying correct torque to secure the sensor against machine vibrations.
• Gap Adjustment: Calibrate the static mechanical air gap until the multimeter reads the specified gap voltage value of -10 V DC nominal.
• Cable Routing: Keep the unarmored 7.0-meter coaxial cable away from high-current power lines and high-frequency noise sources.
• Connector Locking: Engage the miniature coaxial ClickLoc connector fully until a positive click confirms complete pin insertion and stable electrical contact.

Frequently Asked Questions

• What is the primary function of the 330908-00-20-70-02-05 probe?

  The probe senses physical air gap displacement between its tip and a rotating shaft, converting mechanical motion into an electrical vibration signal.

• What thread profile does this specific sensor model use?

  The probe features a standard 3/8-24 UNF thread profile along its housing without stainless steel armor protection.

• Does this hardware component require external power?

  No. As a passive inductive element, it is energized entirely by the excitation voltage supplied from the connected Proximitor sensor unit.

• How should the gap voltage be configured during startup?

  The mechanical gap must be adjusted until the static output voltage rests inside the linear window of -9 V to -11 V DC.

• What type of connector is attached to the integrated cable?

  It uses a miniature coaxial ClickLoc connector designed to resist loosening under continuous heavy vibration.

• What is the total integrated cable length for this part number?

  This specific configuration includes a total cable length of 7.0 meters (23.0 feet).

• Can this probe withstand extreme operating temperatures?

  Yes, the probe tip assembly is rated to operate reliably within a thermal range of -51 deg C to +177 deg C.

• What application scope is intended for the NSv transducer series?

  The NSv system targets restricted spaces and small shaft measurements, including shafts under 51 mm or flat targets under 15 mm.