Product Overview
With a probe temperature range from -35°C to +177°C, the Bently Nevada 330171-12-23-10-01-05 5mm proximity probe reliably monitors shaft vibration and position in harsh industrial environments. This 330171 3300 series probe features a 1/4-28 UNF thread, polyphenylene sulfide (PPS) tip, and a 1.0-meter triaxial cable with a miniature coaxial ClickLoc connector. Designed for turbomachinery, compressors, and large rotating equipment, the 330171-12-23-10-01-05 helps prevent catastrophic failures by providing accurate, real-time displacement data.
Technical Specifications
The Bently Nevada 330171-12-23-10-01-05 operates with a -17.5 Vdc to -26 Vdc power supply at 12 mA maximum consumption. It includes a miniature coaxial ClickLoc connector with connector protector and standard cable. Key electrical and mechanical parameters include:
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Power Supply: Requires -17.5 Vdc to -26 Vdc at 12 mA maximum
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Supply Sensitivity: Less than 2 mV change per volt change in input voltage
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Output Resistance: 50 W
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Probe DC Resistance (1.0 m length): 7.59 ± 0.50 Ω
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Probe Case Thread: 1/4-28 UNF – Maximum Length of Thread Engagement: 0.375 in
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Weight: 0.323 kg
All specifications are measured at +18°C to +27°C with -24 Vdc supply, 10 kW load, AISI 4140 steel target, and 1.27 mm gap unless noted.
Application Case Studies
The 330171-12-23-10-01-05 is ideal for monitoring radial vibration and thrust position in steam turbines, centrifugal compressors, and large electric motors. In one typical installation, the probe’s 1.0-meter cable allows flexible positioning near the bearing housing. The PPS tip withstands oil and debris, while the 1/4-28 thread ensures secure mounting in existing tapped holes. A #3 or larger tap drill is recommended when drilling and tapping for a 1/4-28 probe.
Installation & Setup Guidance
Mount the Bently Nevada 330171-12-23-10-01-05 with recommended probe case torque of 5.1 N·m (45 in-lb) and never exceed 7.3 N·m (65 in-lb). The connector-to-connector torque should not exceed 0.565 N·m (0.42 ft·lbf). Ensure the cable bend radius stays above 25.4 mm (1.0 inch) to prevent internal damage. For magnetic environment considerations, refer to the 60 Hz magnetic field effects up to 300 Gauss: at 50 mil gap, the probe contributes only 0.0014 mV pk-pk/Gauss, indicating excellent immunity.
Maintenance & Reliability
The probe’s temperature schedule (probe only) covers classes T1 through T5 and special EPL Dc classifications, ensuring safe operation from -55°C to +232°C. Tensile strength is 222 N (50 lbf) on both probe case-to-lead and lead-to-extension cable connectors. Gold-plated brass or beryllium copper connectors resist corrosion. Regular inspection of the cable and connector for wear is recommended, especially in high-vibration zones. Avoid prolonged exposure below -34°C to preserve the pressure seal.
Selection Guide & Purchasing Advice
When ordering, confirm the unthreaded length (12 = 1.2 in), overall case length (23 = 2.3 in), and total length (10 = 1.0 meter). The connector option 01 (miniature coaxial ClickLoc with protector) is standard. For multiple agency approvals, option 05 is included. PLC Source PRO stocks the authentic Bently Nevada 330171-12-23-10-01-05 and can advise on related extension cables and Proximitor sensors. Ensure your target material and gap correspond to calibration specifications.