330171-00-28-10-02-05 Bently Nevada 5mm Proximity Probe

Product Overview: 330171-00-28-10-02-05

The Bently Nevada 330171-00-28-10-02-05 is a 5mm proximity probe engineered for exact displacement and vibration measurement in rotating machinery. As part of the 3300 series, it provides engineering-grade precision for condition monitoring systems. This probe features a 1/4-28 UNF thread and a miniature coaxial ClickLoc connector with standard cable. Its PPS tip and AISI 304 stainless steel case ensure durability in harsh industrial environments. By delivering verified, repeatable data, it helps reduce unplanned downtime and maintenance costs.

Key Features & Technical Specifications

• Input Voltage: Requires -17.5 Vdc to -26 Vdc at 12 mA maximum consumption.
• Output Resistance: 50 Ω for stable signal transmission.
• Isolation: Not specified; refer to official datasheet.
• Probe DC Resistance: 7.59 ± 0.50 Ω from center to outer conductor.
• Total Length: 1.0 metre (3.3 feet) with 0.5, 1, 2, 5, or 9 meter cable options.
• Temperature Range: -35°C to +177°C (-31°F to +351°F).
• Weight: 0.323 Kg.

These precise electrical specifications ensure reliable operation and minimize signal errors, directly reducing troubleshooting costs.

Applications and Cost Efficiency

This probe is ideal for monitoring vibration and axial displacement on steam turbines, compressors, and pumps. In power generation, for example, it detects early misalignment, preventing catastrophic failures that cost thousands in repairs. The 5mm probe's high sensitivity and wide temperature range allow accurate measurements in extreme conditions, extending equipment life. Additionally, its low power consumption (12 mA max) reduces energy costs. By providing exact data, it enables predictive maintenance, cutting unnecessary scheduled downtime.

Installation and Setup

Mount the probe using a 1/4-28 UNF threaded hole. A #3 or larger tap drill is recommended for drilling. The maximum thread engagement is 0.375 inches. Apply a recommended torque of 5.1 N·m (45 in·lb) to the probe case, not exceeding 7.3 N·m (65 in·lb). Ensure a minimum cable bend radius of 25.4 mm (1.0 in) to avoid damage. Connect the miniature coaxial ClickLoc connector securely. Verify that the supply voltage stays within -17.5 Vdc to -26 Vdc; operation above -23.5 Vdc may reduce linear range.

Maintenance and Reliability

Periodically inspect the probe tip and cable for wear or contamination. Avoid exposing the probe to temperatures below -34°C (-30°F) to prevent pressure seal failure. The AISI 304 stainless steel case resists corrosion, while the PPS tip withstands harsh chemicals. In high-magnetic-field environments, the probe's output remains stable, as shown by its low sensitivity to 60 Hz fields (e.g., 0.0004 mil pp/gauss at 10 mil gap). This reliability translates to lower lifecycle costs and fewer replacements.