Product Overview
The Bently Nevada 146055-20-02-00 is a 3300 Ceramic Capped Reverse Mount Probe designed for precise vibration and position monitoring in rotating machinery. This industrial automation module delivers reliable performance in harsh environments, featuring an alumina ceramic tip and AISI 304 stainless steel case. With a 2.0-meter standard cable and miniature ClickLoc connector, the 146055-20-02-00 integrates easily into existing 3300 XL systems.
Technical Specifications
Key performance parameters for the 146055-20-02-00 are listed below. All values are from the original Bently Nevada documentation.
| Parameter |
Value |
| Probe Case Thread |
3/8-24 UNF |
| Maximum Length of Thread Engagement |
0.563 in |
| Probe Nominal DC Resistance (Center to Outer Conductor) |
7.88 ± 0.50 ohms (for 2.0 m length) |
| Linear Range |
1.52 mm (60 mils), from 0.25 to 1.78 mm (10 to 70 mils) |
| Incremental Scale Factor (ISF) – Standard 5m/9m system |
7.87 V/mm (200 mV/mil) ±6.5% |
| Probe Tip Material |
Alumina ceramic (Al2O3) |
| Probe Case Material |
AISI 304 stainless steel |
| Cable Type |
75 Ω coaxial, FEP insulated (0.5, 1, 2, 5, or 9 m lengths) |
| Operating & Storage Temperature |
-51°C to +177°C (-60°F to +351°F) |
| Pressure Rating |
34 Bar (500 psi) nitrogen |
Note: Specifications are for a 3300 5 mm system with Proximitor Sensor, extension cable, and probe at +18°C to +27°C, -24 Vdc supply, 10 kW load, AISI 4140 steel target. Performance applies to 3300 XL components only.
Industry Applications
The 146055-20-02-00 excels in critical rotating equipment monitoring. Its ceramic cap resists wear and contamination, making it ideal for:
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Turbo-machinery: Monitor shaft vibration and axial position in turbines and compressors.
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Pumps and motors: Detect early bearing faults and prevent unplanned downtime.
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Generators: Ensure stable operation by tracking rotor dynamics.
Because the 146055-20-02-00 is a reverse mount probe, it suits installations where space is limited or where the probe must be mounted from inside the machine. This design simplifies routing and reduces cable stress.
Installation & Setup Guidance
Proper installation is critical for accurate readings. Follow these guidelines for the 146055-20-02-00:
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Thread engagement: Use the 3/8-24 UNF thread with a maximum engagement of 0.563 inches. Do not over-tighten.
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Target material: The system is calibrated for AISI 4140 steel targets. Using other targets will affect accuracy and interchangeability.
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Cable routing: Keep the 75 Ω coaxial cable away from high-voltage lines and sharp bends. Use the miniature ClickLoc connector for secure attachment.
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Gap setting: Set the initial gap within the linear range (0.25 to 1.78 mm) to ensure the output voltage falls in the –4 to –16 Vdc window.
Maintenance & Reliability
Regular inspection of the probe and cable prevents false readings. Check the ceramic tip for cracks or debris. Verify the cable connector is tight and free of corrosion. The 146055-20-02-00 operates reliably from -51°C to +177°C, but avoid exceeding the pressure rating of 34 Bar. For high-pressure applications, consult the custom design department for sealed modifications. Periodic calibration against a known target ensures long-term accuracy.
Selection Guide & Purchasing Advice
Before ordering, confirm your system requirements. The 146055-20-02-00 includes the probe with a 2.0-meter cable and miniature ClickLoc connector. Verify that your extension cable and Proximitor are compatible with a 5 mm system. If you need a different length, the 3300 series offers 0.5, 1, 5, or 9 meter options. For a reliable supply of Bently Nevada parts, PLC Source PRO provides new and original units with a 12-month factory warranty.