Description

The Bently Nevada 330180-50-CN operates as a high-performance 3300 XL series proximity sensor for non-contacting shaft displacement, vibration, and phase reference (Keyphasor) monitoring. Specifically, the internal electronics continuously convert high-frequency radio frequency (RF) eddy-current gap modulations into a highly accurate, proportional analog DC voltage. Consequently, the unit transmits static and dynamic machinery data directly to continuous machinery protection racks—such as the Bently Nevada 3500 series—without requiring any on-site field calibration.

Hardware Specifications

Transducer Electronics and RFI Resilience

The Bently Nevada 330180-50-CN relies on advanced internal circuitry that inherently rejects radio frequency interference (RFI) and electromagnetic interference (EMI). Because the sensor blocks this noise, technicians do not need specialized external metal shielding conduits or isolated enclosure grounding plates when retrofitting older machinery racks. Furthermore, the internal oscillator conditions the dynamic signal to an average scale factor (ASF) of 200 mV/mil over a 2.0 mm (80 mils) linear range. As a result, the hardware maintains strict compliance with the API 670 machinery protection standard.

Frequently Asked Questions

Q: What specific hardware variables do the “-50” and “-CN” option codes define?

A: The option code -50 designates a 5.0-meter total system length configured for standard panel mounting. To clarify, because this unit integrates a 5.0-meter calibration curve directly, you must connect the Proximitor to a 5.0-meter proximity probe without an intermediate extension cable. Meanwhile, the suffix -CN marks country-specific regulatory approvals, frequently used to satisfy regional conformity standards such as NEPSI/CCC certifications in China.

Q: Can this Proximitor safely mix with older, non-XL Bently Nevada system hardware components?

A: Yes, absolutely. The 3300 XL Proximitor sensor provides complete backwards-compatibility and component interchangeability. Therefore, you can seamlessly pair the 330180-50-CN sensor with legacy non-XL 3300-series 5mm or 8mm probes without introducing measurement degradation or scaling imbalances.

Field Installation Guidelines

• Shielding and Ground Isolation: First, connect the coaxial probe cable securely using the integrated, gold-plated ClickLoc connectors. Turn them finger-tight until you hear an audible click. Next, connect the overall outer shield of the field wiring to the terminal block. Finally, maintain single-point instrumentation ground isolation exclusively at the monitor rack panel.
• Mounting Requirements: Because the “50” suffix provides integrated panel mount holes, you can screw the unit directly onto a flat surface or instrument plate. Alternatively, secure the housing inside a clean, weather-protected junction box near the machine skid. The built-in mounting base eliminates the need for separate isolator plates by providing complete electrical isolation.
• Linear Gap Calibration: During field commissioning, mechanically gap the proximity probe target surface until the static DC terminal output registers a true center-range voltage measurement of -9.0 VDC. This value correlates to a center mechanical gap of roughly 1.27 mm (50 mils).