330702-00-26-50-02-00 Bently Nevada Proximity Sensor 11mm XL

Engineering Overview: Rugged Displacement Sensing

The 330702-00-26-50-02-00 is a heavy-duty 3300 XL 11 mm Proximity Probe, engineered for high-reliability vibration and shaft position monitoring in demanding industrial environments. Featuring a 1/2-20 UNF threaded case and integrated flexible stainless steel armor, this probe provides superior mechanical protection against abrasion and incidental damage. The 5-meter total system length is precisely calibrated for use with standard Bently Nevada 5-meter Proximitor® sensors, ensuring system-wide signal impedance matching.

Configuration Breakdown

The following table outlines the technical architecture of the 330702-00-26-50-02-00:

• Model: 330702 (3300 XL 11mm, Armored)
• Unthreaded Length (00): 0.0 in
• Overall Case Length (26): 2.6 in
• Total Length (50): 5.0 meters (16.4 ft)
• Connector Type (02): Miniature coaxial ClickLoc™
• Agency Approval (00): Not required

Global PLC Spare HUB’s Insight

When your installation environment involves high vibration or potential for physical impact, the 330702-00-26-50-02-00 armored probe is the superior choice over non-armored models. The added armor significantly extends the service life by preventing insulation fatigue caused by high-frequency machine vibration. We emphasize that this 5-meter variant is specifically tuned for the 5-meter Proximitor; substituting mismatched cable lengths will induce signal attenuation and invalidate your calibration data.

Industrial Applications, Diagnostics & Logistics

• Suitable Equipment: Reciprocating machinery, high-speed gearboxes, and industrial blower fans where cable exposure is unavoidable.
• Diagnostic Capability: Enables real-time shaft gap analysis. The stainless steel (SST) case and PPS tip ensure resistance to chemical degradation, allowing for accurate diagnostic readings in harsh, lubricant-rich environments.
• Warranty: 12-month standard factory warranty on all new probes.
• Shipping: Expedited global transit via FedEx, UPS, or DHL; 24–48 hour dispatch window.

Model Comparison & Technical Advice

Technical comparison for your selection process:

• 330702-00-26-50-02-00 (Current Selection): Optimized for standard 5m systems with 1/2-20 UNF threading.
• 330702-00-30-50-11-05: Features a slightly longer 30mm case length for specific depth-critical installations.

Technical Suggestion: When installing the 1/2-20 UNF thread, ensure your mounting bracket is deburred. Even a small metal burr can cause a ground loop, appearing as a 50/60Hz noise spike in your vibration spectrum. Always tighten to the recommended 15.2 N•m (133 in•lb).

Expert Frequently Asked Questions

Why is this probe limited to a 5-meter system?
Proximity systems are impedance-matched at the factory. The capacitance of a 5-meter cable is unique; using it with a 9-meter or 1-meter driver will shift the bias voltage and lead to inaccurate output.

How does the "armored" feature influence the installation bend radius?
Despite the SST armor, the minimum bend radius remains a tight 25.4 mm (1.0 in). However, do not force the armor; it is designed for protection, not for tight-radius routing.

Can I use this probe in hazardous areas if the suffix is "00"?
No. The "00" Agency Approval option indicates the probe is not certified for explosive atmospheres. Always ensure your probe matches your site’s safety certification requirements.

What is the risk of exposing this probe to -34°C?
Below this temperature, the Viton® O-ring internal to the housing can lose its sealing properties. If you operate in cold climates, we suggest utilizing trace heating or an enclosure.

How do I check if the probe has been compromised by mechanical stress?
If the SST armor shows signs of crushing or kinking, the internal triaxial cable geometry may be distorted. This is often detected by a fluctuating "Gap" reading even when the shaft is at rest.

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