Bently Nevada 330780-50-CN 3300 XL 11 mm Proximitor Sensor

Description

330780-50-CN: This 3300 XL 11 mm Proximitor Sensor is configured with a 5.0 m (16.4 ft) total system length and panel mount hardware (Option 50), accompanied by a China-specific hazardous area approval package (Suffix -CN) featuring NEPSI and CCC certifications. The sensor processes eddy-current signals from compatible 11 mm proximity probes and extension cables to provide a 3.94 V/mm (100 mV/mil) analog output proportional to target distance.

Unlike the standard 330780-50-00 or multiple approval -05 configurations, the -CN suffix variant satisfies local regulatory requirements for explosion-proof and flameproof environments in China. The 11 mm proximity system offers an extended 4.0 mm (160 mil) linear measurement range compared to standard 8 mm systems, facilitating displacement and vibration monitoring on large fluid-film bearing machines, steam turbines, and reciprocating compressors.

Features

• Option 50 configuration provides a 5.0-meter system length with integrated panel mount hardware.
• Suffix -CN incorporates NEPSI and CCC hazardous area approvals for industrial installations within China.
• Generates a linear output scale factor of 3.94 V/mm (100 mV/mil) over a 4.0 mm (160 mil) measurement range.
• Directly replaces older 7200-series 11 mm and 14 mm transducer components.
• Provides low-impedance 50-ohm output with high supply noise rejection of less than 2 mV output variation per volt input change.

Applications

• Steam turbine ramp differential expansion measurements.
• Reciprocating compressor rod drop and rod position tracking.
• High-amplitude axial thrust position and radial shaft vibration monitoring.
• Fluid-film bearing machinery displacement tracking.
• Keyphasor phase reference and zero-speed tachometer measurements.

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Secure the Proximitor Sensor unit onto a flat metal surface using the built-in panel mount flange holes.
• When using the field wiring terminal strip, recommend using three-conductor shielded triad cable (0.2 to 1.5 mm2 or 16 to 24 AWG).
• Ensure the maximum distance between the Proximitor Sensor and the monitoring system does not exceed 305 meters (1000 feet).
• Keep the coaxial connector clean and dry; do not expose the connection to turbine oil without a connector protector or self-fusing silicone tape insulation.
• Ground the system shielding at the monitor end to avoid ground loop interference in electrical signals.

Compliance and Certifications

• NEPSI Ex ia IIC T4/T5 Ga (Intrinsically Safe for hazardous locations in China)
• CCC (China Compulsory Certificate) for explosion protection
• CE Mark compliant
• RoHS Directive 2011/65/EU and China RoHS (EFUP 15 years)
• SIL 2 (HFT = 0) / SIL 3 (HFT = 1) capability for functional safety