Bently Nevada 330850-50-05 3300 XL 25 mm Proximitor Sensor

Description

330850-50-05 specifies the 3300 XL 25 mm Proximitor Sensor configured with Option 50 for a 5.0-metre system length in a panel-mount design, combined with Option 05 for multiple agency approvals. This non-contacting sensor pairs with a 3300 XL 25 mm proximity probe and extension cable to measure large-target eddy-current displacement on industrial rotating machinery. It outputs a continuous voltage signal proportional to the distance between the probe tip and the target surface, supporting applications like steam turbine thrust position, large-diameter shaft axial measurement, and reciprocating compressor rod-drop monitoring.

Compared to the DIN-mount variant (Option 51) or the longer 9.0-metre system configurations (Option 90 and 91), this panel-mount configuration mounts directly onto flat metal plates or environmental enclosures. The Option 05 agency approval package qualifies the sensor for hazardous area installations under CSA, ATEX, and IECEx directives. The sensor processes the RF signal generated by the probe tip, maintaining a nominal scale factor of 0.787 V/mm (20 mV/mil) over a 12.7 mm (500 mils) linear range.

Features

• Option 50 specifies a 5.0-metre total system length calibrated for panel-mount installations.
• Option 05 provides multiple agency approvals including CSA, ATEX, and IECEx certifications for hazardous environments.
• Accepts input from a 3300 XL 25 mm proximity probe and matching extension cable.
• Linear measurement range of 12.7 mm (500 mils) beginning at approximately 0.63 mm (25 mils) from the target.
• Nominal scale factor of 0.787 V/mm (20 mV/mil) for precise large-target eddy-current displacement monitoring.
• Rugged A380 aluminum housing housing provides environmental protection for demanding industrial locations.
• Terminal blocks accept standard field wiring conductors from 0.2 to 1.5 mm2 (16 to 24 AWG).

Applications

This transducer sensor is used in the following industrial contexts:

• Steam turbine thrust position monitoring
• Large-diameter shaft axial displacement measurement
• Reciprocating compressor rod-drop monitoring
• Industrial rotating machinery protection systems requiring multi-agency certification

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mount the Proximitor Sensor on a clean, flat surface using the integrated panel-mount plate screw holes.
• Ensure the combined length of the proximity probe and extension cable matches the 5.0-metre calibrated system length of the sensor (Option 50).
• Keep the signal output field wiring isolated from high-voltage power conduits to prevent electromagnetic interference.
• Apply finger-tight torque when mating the coaxial connectors, with a maximum torque limit of 0.565 Nm (5 in-lb). Do not use pliers or aggressive tools.
• Ensure the minimum target diameter of 61 mm (2.4 in) is used to achieve the specified linear calibration range.

Compliance and Certifications

• CE Mark: Complies with applicable European Union directives
• CSA/NRTL/C: Class I, Zone 0: AEx/Ex ia IIC T4/T5 Ga; Class I, Groups A, B, C, D, Class II, Groups E, F, G, Class III
• ATEX/IECEx: II 1 G Ex ia IIC T4/T5 Ga; II 3 G Ex ec IIC T4/T5 Gc (under Option 05 Multiple Approvals package)