Product Overview: Precision 5 mm Proximity Probe
The Bently Nevada 330171-00-20-10-02-00 is a 3300 series 5 mm proximity probe designed for vibration and position monitoring on rotating machinery. Its model code specifies a 1/4-28 UNF thread, no armor, a 2.0 inch overall case length, and a 1.0 metre (3.3 feet) total length. The probe uses a polyphenylene sulfide (PPS) tip and an AISI 304 stainless steel case, with a miniature coaxial ClickLoc connector and standard cable. Built in the U.S.A., this probe provides a rugged sensing solution for machine protection systems.
Key Benefits and Reliability Focus
When installed correctly, the Bently Nevada 330171-00-20-10-02-00 resists many common causes of proximity probe failure: temperature shock, cable fatigue, and loose thread engagement. The 1/4-28 thread and 0.375 in maximum engagement limit simplify mounting. The 25.4 mm minimum cable bend radius reduces strain on the FEP-insulated 75 Ω triaxial cable. These details help maintain stable output and extend service life in harsh industrial environments.
Technical Specifications
Unless otherwise noted, these specifications apply to a proximity transducer system 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).
| Parameter |
Value |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 303 or 304 stainless steel (SST) |
| Probe Cable |
75 Ω triaxial, FEP insulated |
| Probe Case Torque |
5.1 N·m recommended; 7.3 N·m maximum |
| Connector-to-Connector Torque |
0.565 N·m maximum |
| Tensile Strength |
222 N (50 lbf) probe case to probe lead |
- Power Supply: Requires -17.5 Vdc to -26 Vdc at 12 mA maximum consumption.
- Supply Sensitivity: Less than 2 mV change in output voltage per volt change in input voltage.
- Output Resistance: 50 W.
- Probe DC Resistance (1.0 m length): 7.59 ± 0.50 Ω.
- Probe Case Thread: 1/4-28; maximum thread engagement 0.375 in.
- Probe Temperature Range: -35°C to +177°C.
- Minimum Cable Bend Radius: 25.4 mm (1.0 in).
- Weight: 0.323 kg.
The 7.59 Ω probe DC resistance at 1.0 m provides a stable reference for signal conditioning, while the 50 W output resistance is a key electrical parameter for verifying system wiring and load conditions. The PPS tip and stainless steel case offer chemical resistance and mechanical strength, making the Bently Nevada 330171-00-20-10-02-00 a dependable choice for continuous vibration monitoring.
Industry Applications
In turbomachinery, compressors, pumps, and generators, the Bently Nevada 330171-00-20-10-02-00 supplies accurate shaft vibration data that supports predictive maintenance. The PPS tip and stainless steel case withstand process contamination, while the temperature schedule covers typical machine train environments. The 1.0 metre cable length suits installations with short extension runs. Use the 60 Hz magnetic field data to plan sensor placement away from high-flux regions when maximum accuracy is required.
Installation Guidance
Drill and tap the mounting hole for a 1/4-28 probe; use a #3 or larger tap drill. Engage the threads to a maximum depth of 0.375 in. Tighten the probe case to 5.1 N·m recommended, and never exceed 7.3 N·m. For connector-to-connector joints, keep torque at or below 0.565 N·m. Route cables with at least 25.4 mm bend radius to prevent internal damage.
Maintenance, Troubleshooting, and Selection
Inspect the cable for cuts or kinks, especially near the probe head. Verify connector torque after maintenance. Avoid exposing the probe to temperatures below -34°C, as this may cause premature pressure seal failure. Confirm your target material and gap before installation. The Bently Nevada 330171-00-20-10-02-00 is a 1.0 metre probe with a 1/4-28 thread plus ClickLoc connector. For reliable sourcing of industrial automation spares, PLC Source PRO can help you confirm the correct Bently Nevada 330171-00-20-10-02-00 for your system.