330171-00-20-10-02-00 | Bently Nevada 5mm Probe, 1/4-28 UNF

Product Overview

The Bently Nevada 330171-00-20-10-02-00 is a 5mm proximity probe designed for precise vibration and position measurement in critical rotating machinery. This model features a 1/4-28 UNF thread, a 1.0-meter cable, and a miniature coaxial ClickLoc connector, making it a reliable choice for turbomachinery, pumps, and compressors. As part of the 3300 series, this probe delivers the accuracy and durability that plant engineers trust for continuous monitoring.

With a probe tip made of polyphenylene sulfide (PPS) and a case constructed from AISI 304 stainless steel, the 330171-00-20-10-02-00 withstands harsh industrial environments. The unthreaded length is 0 inches, and the overall case length is 2.0 inches, providing a compact footprint for tight installations. Weighing just 0.323 kg, this probe is lightweight yet robust, ensuring minimal mechanical stress on mounting points.

Technical Specifications

Key specifications for the 330171-00-20-10-02-00 include:

Probe Tip Material: Polyphenylene sulfide (PPS) – offers excellent chemical resistance and thermal stability.

Probe Case Material: AISI 304 stainless steel – provides corrosion resistance and mechanical strength.

Thread Size: 1/4-28 UNF – standard for easy mounting in pre-drilled holes.

Total Length: 1.0 meter (3.3 feet) – suitable for most installation configurations.

Connector: Miniature coaxial ClickLoc – ensures secure, quick connections.

Weight: 0.323 kg – lightweight for easy handling.

Probe Temperature Range: -35°C to +177°C (-31°F to +351°F) – operates reliably in extreme conditions.

Probe Case Torque: 5.1 N·m recommended, 7.3 N·m maximum – prevents over-tightening damage.

These specifications ensure accurate measurements and long service life, reducing total cost of ownership.

Industry Applications

The 330171-00-20-10-02-00 excels in vibration monitoring for rotating equipment. In petrochemical plants, it helps detect shaft vibration in pumps and compressors, preventing unplanned downtime. In power generation, it monitors turbine bearings, enabling predictive maintenance that avoids costly failures. Its robust design also suits paper mills and steel plants where harsh conditions are common.

By integrating this probe into your condition monitoring system, you gain early warning of mechanical issues, allowing scheduled repairs instead of emergency shutdowns. This proactive approach significantly reduces maintenance costs and extends equipment life.

Installation & Setup

Proper installation is critical for accurate readings. When mounting the 330171-00-20-10-02-00, drill and tap a hole using a #3 or larger tap drill for the 1/4-28 thread. Ensure the probe case thread engagement does not exceed 0.375 inches to avoid mechanical interference. Use the recommended torque of 5.1 N·m (45 in·lb) for the probe case, and do not exceed 7.3 N·m (65 in·lb) to prevent damage.

For the connector-to-connector torque, follow the table provided in the manual, with a maximum of 0.565 N·m (0.42 ft·lbf). Maintain a minimum cable bend radius of 25.4 mm (1.0 inch) to protect the cable integrity. Calibrate the system with a target gap of 1.27 mm (50 mils) for optimal linearity.

Maintenance & Reliability

Routine inspection of the probe and cable is essential. Check for physical damage, especially at the connector and cable entry points. Avoid exposing the probe to temperatures below -34°C (-30°F), as this may cause premature failure of the pressure seal. Periodically verify the probe's DC resistance (7.59 ± 0.50 Ω for a 1.0-meter probe) to ensure electrical integrity.

Regular maintenance minimizes downtime and extends probe life, offering a high return on investment. By catching issues early, you avoid costly emergency replacements and maintain production efficiency.

Selection Guide & Purchasing Advice

When selecting a replacement probe, verify the thread type (1/4-28 UNF), total length (1.0 meter), and connector option (ClickLoc). Ensure compatibility with your existing extension cable and proximitor. If you need different lengths (0.5, 1, 2, 5, or 9 meters) or other options, contact BluePLC Industrial for assistance.

BluePLC Industrial offers genuine Bently Nevada parts with competitive pricing and fast delivery. Contact us to confirm availability and lifecycle status before ordering. Our team can help you choose the right probe for your application, ensuring optimal performance and cost-effectiveness.