Description

The Bently Nevada 330780-90-05 is an advanced eddy current measurement device within the 3300 XL 11 mm Proximitor Sensor series, designed to process signals from a proximity probe and extension cable combination. It delivers a continuous, linear voltage output directly proportional to the static distance (gap) or dynamic vibration between the probe tip and the observed target. This sensor is explicitly engineered for high-performance fluid-film bearing machinery monitoring and vibration analysis within critical machinery protection systems, including the Bently Nevada 3500 System.

The hardware offers reliable input-output capabilities by converting target movement into standard industrial electrical signals, allowing direct interfacing with machinery protection monitors, distributed control systems (DCS), and plant asset management networks. This module features robust physical protection and EMI/RFI immunity, enabling deployment across severe industrial applications such as oil and gas processing, petrochemical production, power generation facilities, and mining installations.

Features

• Linearized Voltage Output: Delivers exceptional accuracy and repeatable calibration for vibration, gap, and speed measurements.
• System Compatibility: Fully compatible with standard 3300 XL 11 mm proximity probes and extension cables, integrating with monitoring architectures.
• Enhanced RFI/EMI Immunity: Provides robust resistance against electromagnetic interference without requiring specialized external conduit housing.
• DIN Rail Mounting Option: Features a flexible physical design supporting convenient standard DIN rail mounting or traditional panel installation.
• Integral Coaxial Connector Protectors: Prevents moisture ingress and external contamination, maintaining signal integrity at the physical interface.

Applications

• Steam and gas turbines
• Centrifugal and axial compressors
• Industrial pumps and electric motors
• Hydroelectric generators
• Cooling tower fans and gearboxes

Technical Specifications

Connections/Interfaces

Installation Guidelines

Grounding and Shielding

• Ensure the sensor housing is insulated from the underlying structure or connected to the designated system ground to eliminate potential ground loop interference.
• Maintain the continuous shield from the probe connection back to the monitor panel, grounding the shield only at the monitor common point.

Probe Gap Adjustment

• Adjust the initial physical gap between the target material and the probe tip until the output voltage reads approximately -10.0 Vdc, corresponding to the midpoint of the linear operating range.

Cable Routing and Physical Protection

• Route all interconnecting coaxial cables away from high-voltage machinery lines or structural paths prone to extreme mechanical vibration.
• Install physical connector protectors over the coaxial junctions to maintain proper signal protection against fluids, grease, and ambient moisture.

Compliance and Certifications

• ATEX / IECEx Zone 0, Zone 2
• CSA Class I, Division 1 and 2
• TR CU (EAC) Hazardous Area Approvals