Product Overview
Part of the 3300 series, the Bently Nevada 146055-20-02-05 is a ceramic capped reverse mount proximity probe engineered for precision vibration and position monitoring in rotating machinery. This 5 mm system probe delivers reliable performance in demanding industrial environments, making it a critical component for predictive maintenance programs.
Key Specifications
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Model: 3300 Ceramic Capped Reverse Mount Probes
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Thread Size: 3/8-24 UNF
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Total Length: 2.0 meters (6.6 feet)
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Connector: Miniature ClickLoc coaxial connector, standard cable
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Agency Approval: Multiple Approvals
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Probe Tip Material: Alumina ceramic (Al2O3)
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Probe Case Material: AISI 304 stainless steel
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Probe Cable: 75 Ω coaxial, FEP insulated
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Operating Temperature: -51°C to +177°C (-60°F to +351°F)
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Pressure Rating: Seals 34 Bar (500 psi) nitrogen
Technical Specifications
This table details the performance characteristics of the Bently Nevada 146055-20-02-05 when used with a 3300 5 mm system (Proximitor Sensor, extension cable, and probe) at +18°C to +27°C, with a -24 Vdc power supply, 10 kΩ load, and AISI 4140 steel target.
| Parameter |
Value |
| Linear Range |
1.52 mm (60 mils); begins at ~0.25 mm (10 mils) from target; range from 0.25 to 1.78 mm (10 to 70 mils), approx. -4 to -16 Vdc |
| Incremental Scale Factor (ISF) |
7.87 V/mm (200 mV/mil) ±6.5% including interchangeability error (standard 5-meter or 9-meter system) |
| Probe Nominal DC Resistance (2.0 m length) |
7.88 ± 0.50 ohms (center conductor to outer conductor) |
| Maximum Thread Engagement Length |
0.563 in |
Industry Applications
The Bently Nevada 146055-20-02-05 excels in monitoring shaft vibration and axial position in turbines, compressors, pumps, and generators. Its ceramic tip provides excellent wear resistance, while the reverse mount design simplifies installation in confined spaces. In a typical steam turbine train, this probe helps detect early bearing wear, enabling proactive maintenance and avoiding unplanned downtime.
Installation Guidance
Proper installation is critical for accurate readings. Ensure the target surface is clean and matches the AISI 4140 steel specification for system accuracy. Mount the probe with the 3/8-24 thread, ensuring the tip is positioned within the linear range (0.25 to 1.78 mm from the target). Use the ClickLoc connector to secure the cable, and route the cable away from high-interference sources. Verify the probe resistance (7.88 ± 0.50 ohms) before installation to confirm integrity.
Maintenance & Reliability
The Bently Nevada 146055-20-02-05 is designed for long service life. The alumina ceramic tip resists wear, and the stainless steel case withstands harsh environments. Operating temperature range of -51°C to +177°C ensures reliability in extreme conditions. Periodically inspect the cable and connector for damage, and verify the pressure seal if used in high-pressure applications. Regular calibration checks against a known target help maintain measurement accuracy.
Selection Guide
When selecting a replacement probe, confirm your system requirements: total length (this unit is 2.0 meters), connector type (Miniature ClickLoc), and agency approvals (Multiple Approvals). Ensure compatibility with your existing 3300 XL components. PLC Source PRO supplies new, original Bently Nevada parts with a 12-month factory warranty, ensuring genuine performance and reliability.