Configured for non-contacting shaft displacement and vibration measurements in machinery protection systems, the Bently Nevada 330701-00-20-10-02-00 (330701 Proximity Transducer) provides direct physical/electrical execution. It measures static and dynamic displacements of rotating shafts by converting spatial gaps into proportional electrical signals for direct processing by monitoring hardware.

Suffix Breakdown & Model Matrix

• 330701: 3300 XL 11 mm Proximity Probe with 1/2-20 UNF thread, without armor.

• 00: Unthreaded Length option (0.0 in).

• 20: Overall Case Length option (2.0 in).

• 10: Total Length option (1.0 meter, 3.3 feet).

• 02: Connector option (Miniature coaxial ClickLoc connector, standard cable).

• 00: Agency Approval option (No standard hazardous area certification flags).

Hardware Specifications

Eddy-Current Probe Scaling and Gap Voltage Validation

The 3300 XL 11 mm system utilizes radio frequency eddy-current principles to measure displacement over an extended 4.0 mm range. Proper signal calibration depends upon precise eddy-current probe scaling tuned to the target metallurgy. During field setup, technicians perform gap voltage validation to anchor the transducer loop within its optimal linear region.

Adjusting the physical clearance until the Proximitor output registers a stable -10 VDC targets the precise midpoint of the linear calibration scale. This calibration center allows full-scale tracking of complex rotor dynamics without clipping voltage thresholds. In configurations where multiple transducers are installed within close physical boundaries, mechanical separation thresholds must be maintained to provide adequate cross-talk suppression and isolate genuine shaft behavior from adjacent sensor fields.

Frequently Asked Questions

Q: Can this 1.0-meter probe assembly be linked to a standard 3300 XL 8 mm Proximitor Sensor?

A: No. The 11 mm probe requires distinct eddy-current probe scaling and must be paired exclusively with a 3300 XL 11 mm Proximitor Sensor. Connecting it to an 8 mm driver will result in an incorrect scale factor and non-linear signal responses.

Q: What is the mechanical impact on the measurement loop if the probe cable is modified or spliced in the field?

A: Coaxial cables for proximity transducers cannot be spliced or altered in length. The total physical length of the probe and extension cable forms a tuned RF circuit. Splicing alters loop impedance, corrupts calibration scaling, and results in a permanent Transducer Fault status on the monitoring rack.

Q: Is this sensor hardware rated for live hot-swap connections at the ClickLoc coaxial joint during active machine operation?

A: Separating the ClickLoc connector while the associated monitor card is active will break the electrical loop circuit, causing an immediate Transducer Fault (NOT OK) flag. To avoid false executive protection trips, the corresponding channel logic must be placed into a bypassed state before disconnect.

Field Installation Guidelines

• Mechanical Torque Controls: When installing the 1/2-20 UNF threaded case into the mounting bracket, do not exceed the absolute installation torque limit of 22.6 N-m (200 in-lb) to prevent case distortion or structural failure.

• Physical Clearance Constraints: To achieve proper cross-talk suppression and eliminate side-viewing errors from surrounding structural steel, ensure a minimum counterbore diameter of 50.8 mm (2.0 in) when the probe tip must be recessed. Maintain a clear radius of at least 25.4 mm (1.0 in) from any adjacent metallic components.

• Coaxial Connector Handling: Inspect the ClickLoc coaxial connection to verify it is dry and free of lubricants prior to final assembly. Lock the coupling entirely by hand until a physical tactile click is established. Do not apply mechanical tools like pliers to tighten the interface.

• Cable Bend Radius Limits: Ensure the integrated coaxial cable does not drop below a minimum static bend radius of 25.4 mm (1.0 in). Avoid creating sharp kinks or structural pinching under routing ties.

• Shielding Ground Protocol: Keep the outer coaxial shield insulated from the machinery casing along the routing path. The shielding path must follow a single-point grounding layout, running isolated until it terminates at the dedicated ground terminal of the Proximitor Sensor station.

Ordering Information

The procurement item includes the following components:

1. (1) 330701-00-20-10-02-00 Proximity Probe assembly.

2. (2) Removable clear silicone protective connector boots.

3. (1) Hexagonal locknut for case mounting.

4. (1) Factory calibration verification document.

Dispatch & Freight Logistics

• Transit Window: 2-7 days when payment finish through verified industrial banking infrastructure.

• Logistics Distribution: Consignments are dispatched internationally via priority express routes with DHL, FEDEX, or UPS.

• Enclosure Standards: Shipped exclusively within sealed anti-static industrial packaging boundaries lined with shock-absorbent materials to preserve the integrity of the internal eddy-current coil structure.