Product Introduction
The Bently Nevada 330171-00-12-10-01-CN is a 5mm proximity probe designed for reliable vibration and displacement measurement in industrial rotating machinery. Part of the 3300 series, this probe features a 1/4-28 UNF thread without armor, a 1.0-meter cable, and a miniature coaxial ClickLoc connector with a connector protector. Manufactured in the U.S.A., it offers robust performance in demanding environments.
Technical Specifications
The following specifications are for a proximity transducer system operating between +18°C and +27°C with a -24 Vdc power supply, a 10 kW load, an AISI 4140 steel target, and a probe gapped at 1.27 mm (50 mils).
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Power Supply: Requires -17.5 Vdc to -26 Vdc at 12 mA maximum consumption. Operation at a more positive voltage than -23.5 Vdc can reduce linear range.
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Sensitivity: Less than 2 mV change in output voltage per volt change in input voltage.
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Output Resistance: 50 Ω.
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Probe DC Resistance: For a 1.0-meter probe, resistance from center conductor to outer conductor is 7.59 ± 0.50 Ω.
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Probe Tip Material: Polyphenylene sulfide (PPS).
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Probe Case Material: AISI 304 stainless steel (SST).
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Probe Cable: 75 Ω triaxial, fluoroethylene propylene (FEP) insulated, available in lengths of 0.5, 1, 2, 5, or 9 meters.
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Probe Temperature Range: -35°C to +177°C (-31°F to +351°F).
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Weight: 0.323 kg.
Real-World Applications
This probe is ideal for vibration monitoring in steam turbines, centrifugal compressors, pumps, and fans. The Bently Nevada 330171-00-12-10-01-CN provides precise gap measurements, enabling early detection of shaft orbit changes and bearing wear. In chemical processing plants, its PPS tip and stainless steel case resist corrosion, while the ClickLoc connector ensures secure signal transmission in high-vibration areas.
Installation & Setup Guidance
Mount the probe using a 1/4-28 threaded hole. For a 1/4-28 probe, a #3 or larger tap drill is recommended. The maximum length of thread engagement is 0.375 inches. The probe case torque should be 5.1 N·m (45 in·lb) recommended, with a maximum of 7.3 N·m (65 in·lb). The connector-to-connector torque maximum is 0.565 N·m (0.42 ft·lbf). Ensure the cable bend radius does not exceed 25.4 mm (1.0 in) to prevent damage.
Maintenance & Reliability
Operate within the temperature range -35°C to +177°C. Exposure below -34°C may cause premature failure of the pressure seal. The probe case and lead have a tensile strength of 222 N (50 lbf). Regularly inspect the cable and connector for wear. The gold-plated brass or beryllium copper connectors provide reliable electrical contact over time.
Selection Guide & Purchasing Advice
When ordering, ensure the unthreaded length option (00 = 0 in), overall case length (12 = 1.2 in), total length (10 = 1.0 meter), and connector option (01 = miniature coaxial ClickLoc with standard cable) match your system requirements. The agency approval option CN indicates country-specific approvals. For further assistance, PLC Source PRO offers expert support for this and other Bently Nevada parts.