330171-00-12-10-02-CN Bently Nevada 5mm Probe 1/4-28

Product Overview: 330171-00-12-10-02-CN

The Bently Nevada 330171-00-12-10-02-CN is a 5 mm proximity probe engineered for precise displacement and vibration measurement in rotating machinery. As part of the 3300 series, this probe features a 1/4-28 UNF thread and is supplied without armor. Its compact 1.2-inch case and 1.0-meter total length suit installations where space is constrained. The probe tip is made from polyphenylene sulfide (PPS), while the case uses AISI 304 stainless steel for durability. With a weight of just 0.323 kg, it integrates easily into existing transducer systems. This probe requires a -17.5 Vdc to -26 Vdc power supply and consumes a maximum of 12 mA, ensuring compatibility with standard Bently Nevada proximitor sensors. The miniature coaxial ClickLoc connector provides a secure, reliable interface. For engineers seeking engineering-grade precision in condition monitoring, this probe delivers verified performance.

Key Specifications of the 330171-00-12-10-02-CN

• Input Voltage: -17.5 Vdc to -26 Vdc
• Maximum Current Consumption: 12 mA
• Probe DC Resistance: 7.59 Ω ± 0.50 Ω
• Output Resistance: 50 Ω
• Probe Temperature Range: -35°C to +177°C
• Total Length: 1.0 metre (3.3 feet)
• Weight: 0.323 kg
• Connector: Miniature coaxial ClickLoc

Notably, the probe's sensitivity to input voltage fluctuations is less than 2 mV per volt, which preserves measurement integrity in electrically noisy environments. The 1/4-28 thread ensures compatibility with standard mounting holes, and the maximum thread engagement is 0.375 inches. For drilling and tapping, a #3 or larger tap drill is recommended.

Failure Mode Analysis: Enhancing Reliability

In harsh industrial settings, proximity probes can fail due to mechanical stress, temperature extremes, or connector issues. The 330171-00-12-10-02-CN addresses these risks with a robust PPS tip and stainless steel case. However, exposing the probe to temperatures below -34°C may cause premature pressure seal failure. Therefore, adhere to the specified operating range of -35°C to +177°C. The miniature coaxial ClickLoc connector resists vibration-induced loosening, but proper torque is critical: the recommended probe case torque is 5.1 N·m, with a maximum of 7.3 N·m. Connector-to-connector torque should follow the manufacturer's table. Additionally, the cable bend radius must not be less than 25.4 mm to prevent conductor damage. By following these guidelines, engineers can avoid common failure modes and extend service life.

Installation and Integration Guidance

When installing the 330171-00-12-10-02-CN, ensure the mounting hole is drilled and tapped to 1/4-28 UNF specifications. Use a #3 or larger tap drill. Apply the recommended torque to the probe case, but do not exceed 7.3 N·m. The probe's unthreaded length is 0 inches, meaning the entire case length is threaded for secure engagement. For electrical connections, the miniature coaxial ClickLoc connector mates with standard extension cables. Verify that the power supply provides -17.5 Vdc to -26 Vdc; operation at voltages more positive than -23.5 Vdc may reduce linear range. The probe is compatible with Bently Nevada 3300 series proximitor sensors. For integration into plant-wide monitoring systems, consult the machinery protection system documentation.