The Bently Nevada 330101-00-08-05-02-05 serves as the primary 330101 Proximity Probe utilized to execute non-contacting shaft displacement and dynamic vibration measurements across 3300 XL Machinery Protection System platforms. The device translates the physical distance variations between the sensor face and a rotating conductive target into an equivalent radio frequency impedance change. This modulated electrical property is processed by an external Proximitor Sensor to output a precise, linear voltage representation of mechanical movement.

Part Number Variable Options

• 330101: 3300 XL 8 mm Proximity Probe, 3/8-24 UNF thread, without armor.

• 00: Unthreaded length option (0.0 in).

• 08: Overall case length option (0.8 in).

• 05: Total length option (0.5 m / 1.6 ft).

• 02: Connector option (Miniature coaxial ClickLoc connector with connector protector).

• 05: Agency approval option (Multiple thread-type approvals).

Mechanical and Electrical Data

Gap Voltage Validation and Rotor Dynamics Analysis

The 8 mm eddy-current probe configuration requires precise physical positioning to satisfy standard target calibration curves. During the initial machine setup phase, gap voltage validation must be performed to center the static position output at approximately -10 VDC targets relative to the monitored surface. This voltage reference corresponds to the geometric center of the linear calibration range on standard AISI 4140 steel. Proper spatial alignment limits physical cross-talk suppression failures when positioning multiple probes in close proximity to monitor complex rotor dynamics, including critical speed excursions or oil whirl behavior.

Shipping Inventory

• 1 330101-00-08-05-02-05 Proximity Probe with 0.5 m coaxial lead wire

• 2 3/8-24 UNF Locking Nuts

• 1 Factory Installed ClickLoc Connector Protector

• 1 Technical Installation Leaflet

Mechanical Mounting and Wiring Rules

• Threading Profiles and Fastener Torque

• Insert the probe housing through the internal 3/8-24 UNF threaded port, ensuring a minimum of 5 full threads of engagement to support robust physical indexing.

• Secure the assembly by torquing the dual locking nuts to a terminal specification of 10.7 N-m (95 in-lb).

• Interconnect Protection and Shield Isolations

• Route the coaxial lead wire while preserving a minimum structural bend radius of 25.4 mm (1.0 in) to protect the internal core dielectric layer.

• Encase all sensor transmission wiring inside continuous metallic conduit lines to separate weak signals from transient high-voltage paths.

Frequently Asked Questions

• What baseline gap voltage must be established during field positioning?

  The hardware must be mechanically adjusted to achieve a -10 VDC targets reference output from the corresponding Proximitor, centering it inside the linear range.

• Can this 0.5 m probe be wired directly into standard monitoring loops without extension leads?

  No, this specific probe option has a total length of 0.5 m and requires a matched 4.5 m or 8.5 m extension cable to complete the nominal 5.0 m or 9.0 m tuned system.

• Does this part number include flexible stainless steel conduit armor over the outer jacket?

  No, the 330101-00-08-05-02-05 specification utilizes option code 00 for unthreaded length and non-armored standard coaxial wire construction.

• Will trimming the integral cable to a shorter length impact system tracking?

  Yes, reducing the physical length alters the total capacitance of the RF circuit, which shifts calibration limits and degrades the scale factor performance.

• What standard alloy target material is used to calibrate this sensor?

  The factory calibration curve is configured specifically for AISI 4140 steel; other conductive target metals will skew the output voltage accuracy.

• Is it permissible to connect or disconnect this probe while the monitoring rack is powered?

  Yes, hot-swap operations at the ClickLoc coaxial connector will not inflict damage on the electrical circuits, though it will prompt a brief channel fault alarm.

• How should the internal terminal connector be protected against moisture penetration?

  Install the included connector protector sleeve tightly over the junction or wrap the interface with self-fusing insulation tape to keep moisture out.

• What is the consequence of torqueing the mounting hex nuts past the designated limit?

  Exceeding 10.7 N-m can crack or distort the internal ceramic tip assembly, permanently changing the impedance or ending sensor functionality entirely.