330174-00-03-10-02-CN Bently Nevada 3300 5mm Probe M8

Introduction: The Evolution of Precision Monitoring

In the early days of industrial machinery, maintenance teams relied on their senses—listening for abnormal sounds, feeling for excessive vibration, and visually inspecting for wear. As rotating equipment became faster and more complex, this approach proved inadequate. The industry needed a way to measure vibration and position with engineering-grade precision, in real time, without contact. Eddy current proximity probes emerged as the solution, and Bently Nevada has been at the forefront of this technology for decades. The 330174-00-03-10-02-CN is a direct descendant of that legacy, a 5mm probe designed for exacting measurement in critical turbomachinery applications.

Technical Specifications of the 330174-00-03-10-02-CN

This probe is part of the 3300 series and features a 5mm tip diameter with an M8 x 1 thread. The overall case length is 30 mm, and the total length is 1.0 metre (3.3 feet). It comes with a miniature coaxial ClickLoc connector and standard cable. The probe tip is made of polyphenylene sulfide (PPS), while the case is constructed from AISI 304 stainless steel. The weight is 0.323 Kg. For a complete list of parameters, refer to the table below.

• Product Type: 3300 5mm Probe, M8 x 1 thread, with armor
• Connector: Miniature coaxial ClickLoc connector, standard cable
• Total Length: 1.0 metre (3.3 feet)
• Overall Case Length: 30 mm
• Unthreaded Length: 0 mm
• Probe Tip Material: Polyphenylene sulfide (PPS)
• Probe Case Material: AISI 304 stainless steel (SST)
• Weight: 0.323 Kg
• Agency Approval: CN = Country Specific

Installation and Integration

Proper installation is critical for accurate measurements. The probe case thread is M8 x 1, with a maximum thread engagement of 12 mm. Recommended probe case torque is 5.1 N·m (45 in·lb), and the maximum is 7.3 N·m (65 in·lb). The minimum cable bend radius is 25.4 mm (1.0 in). The probe operates with a -17.5 Vdc to -26 Vdc power supply, drawing a maximum of 12 mA. Note that operation at a more positive voltage than -23.5 Vdc can reduce linear range. The output resistance is 50 Ω, and the probe DC resistance at 1.0 m is 7.59 ± 0.50 Ω. For integration with monitoring systems, the probe connects via the miniature coaxial ClickLoc connector. Ensure the target is AISI 4140 steel and gapped at 1.27 mm (50 mils) for optimal performance.

Reliability and Environmental Considerations

The probe is designed to withstand harsh conditions. Its temperature range is -35°C to +177°C (-31°F to +351°F). However, exposing the probe to temperatures below -34°C (-30°F) may cause premature failure of the pressure seal. The probe exhibits excellent immunity to 60 Hz magnetic fields, with minimal output voltage variation. For detailed temperature classifications, refer to the official datasheet. Regular inspection of the probe tip and cable is recommended to ensure continued engineering-grade precision.