330173-00-04-20-02-CN Bently Nevada 3300 5mm Probe M8

Introduction: The Evolution of Precision Monitoring

Since the dawn of industrial automation, engineers have sought ever more precise ways to monitor rotating machinery. Early mechanical dial indicators gave way to eddy current proximity probes, which offered non-contact measurement and greater reliability. The Bently Nevada 3300 series represents a mature, field-proven generation of this technology. The 330173-00-04-20-02-CN is a 5mm probe with M8 x 1 thread, designed for exact displacement and vibration measurement in harsh environments. Its engineering-grade construction ensures consistent performance where lesser sensors fail.

330173-00-04-20-02-CN Technical Specifications

This probe operates as part of a proximity transducer system, typically powered by a -24 Vdc supply. The following table summarizes key electrical and mechanical parameters.

For specifications not listed here, refer to the official Bently Nevada datasheet.

Key Features and Engineering Advantages

• 5mm probe diameter with M8 x 1 mounting thread for secure installation.
• Polyphenylene sulfide (PPS) tip material offers chemical resistance and thermal stability.
• AISI 304 stainless steel case provides durability in corrosive atmospheres.
• Miniature coaxial ClickLoc connector ensures reliable signal transmission.
• 2.0 metre total length with 0 mm unthreaded length for direct mounting.
• Operating temperature range: -35°C to +177°C (-31°F to +351°F).
• Probe case torque: 5.1 N·m (45 in·lb) recommended, 7.3 N·m (65 in·lb) maximum.
• Minimum cable bend radius: 25.4 mm (1.0 in).

Each feature contributes to engineering-grade precision in displacement measurement.

Applications and Use Cases

This probe excels in turbomachinery monitoring, including steam turbines, compressors, and pumps. For instance, in a power plant, it detects shaft vibration to prevent catastrophic failure. Additionally, its stainless steel case suits offshore platforms where corrosion is a concern. Furthermore, the 2.0 metre length allows flexible mounting in tight spaces. Consequently, maintenance teams rely on its exact output for predictive maintenance programs.

Installation and Setup

Install the probe using the M8 x 1 thread, ensuring the target is AISI 4140 steel for calibration. Maintain a gap of approximately 1.27 mm (50 mils) for optimal linear range. Connect the ClickLoc connector to the extension cable, observing the minimum bend radius. Finally, verify the power supply is within -17.5 Vdc to -26 Vdc.

Maintenance and Reliability

Periodically inspect the probe tip for damage or contamination. Since the probe operates in extreme temperatures, avoid exposure below -34°C (-30°F) to prevent seal failure. Also, check cable integrity and connector torque. With proper care, the 330173-00-04-20-02-CN delivers long service life.