330173-04-08-10-02-00 Bently Nevada 3300 5mm Probe M8

Product Overview: Bently Nevada 330173-04-08-10-02-00

The Bently Nevada 330173-04-08-10-02-00 is a 3300 Series 5 mm proximity probe engineered for precise, non-contact displacement and vibration measurement in rotating machinery. As an engineer, you need a transducer that delivers repeatable data under demanding conditions. This probe meets that requirement with a verified design that includes an M8 x 1 thread, a 40 mm unthreaded length, and an 80 mm overall case length. The 1.0 metre total length provides flexible installation without compromising signal integrity. The miniature coaxial ClickLoc connector ensures a secure, low-noise interface to your extension cable and proximitor system.

Key Specifications and Engineering Details

Every parameter of the 330173-04-08-10-02-00 is specified for exact system integration. The probe requires a -17.5 Vdc to -26 Vdc power supply with 12 mA maximum consumption. Operation at a more positive voltage than -23.5 Vdc can reduce linear range, so precise supply regulation is critical. The output resistance is 50 Ω, and the probe DC resistance from center conductor to outer conductor is 7.59 ± 0.50 Ω at 1.0 m length. The probe tip is made from polyphenylene sulfide (PPS), while the case uses AISI 304 stainless steel for corrosion resistance. The cable is 75 Ω triaxial with FEP insulation. The probe operates from -35°C to +177°C, and exposure below -34°C may cause premature pressure seal failure. The recommended probe case torque is 5.1 N·m (45 in·lb), with a maximum of 7.3 N·m (65 in·lb). The minimum cable bend radius is 25.4 mm (1.0 in).

Performance and Reliability

In 60 Hz magnetic fields up to 300 Gauss, the probe output remains stable: 0.0014 mil pp/gauss at a 50 mil gap. This low sensitivity to magnetic interference ensures accurate readings in electrically noisy industrial environments. The 5 mm probe delivers 222 N (50 lbf) tensile strength between the probe case and lead, as well as between the lead and extension cable connectors. The connector material is gold-plated brass or gold-plated beryllium copper, providing reliable electrical contact over time. The M8 x 1 thread allows a maximum thread engagement of 12 mm, ensuring secure mounting without over-torquing.

Applications and Integration

The 330173-04-08-10-02-00 is suited for steam turbines, compressors, pumps, and other high-speed rotating equipment where precise radial and axial displacement measurement is required. Because the probe uses a miniature coaxial ClickLoc connector, it integrates directly with Bently Nevada 3300 Series extension cables and proximitor sensors. When routing cables, respect the 25.4 mm minimum bend radius to avoid signal degradation. The probe's 1.0 metre length is ideal for installations where the proximitor is mounted nearby. For longer runs, use the appropriate extension cable from the 3300 series. Always verify that the target material is AISI 4140 steel or equivalent, as the factory calibration is based on that target. The probe is not armored, so consider protective conduit in areas with mechanical abrasion.

Installation and Maintenance Guidance

Install the probe using the M8 x 1 thread, applying torque within the recommended range. Ensure the unthreaded length of 40 mm is accounted for in your mounting bracket design. The overall case length of 80 mm must be accommodated to avoid interference. After installation, verify the gap voltage using a calibrated proximitor. Periodically inspect the probe tip for contamination or damage, and check cable integrity near the connector. Because the probe operates near high temperatures, monitor the ambient temperature to stay within the -35°C to +177°C range. For detailed temperature classification and hazardous area approvals, refer to the official Bently Nevada documentation. Please verify current lifecycle status and availability with AutoDCSTech before ordering.