Bently Nevada 330851-02-000-60-10-00-05 3300 XL 25 mm Proximity Probe

Description

Threaded M30x2 metric steel case (Option 02) with 0.0 mm unthreaded length (Option 000) and 60 mm overall case length (Option 60) defines the configuration of the 330851-02-000-60-10-00-05 3300 XL 25 mm Proximity Probe.

This configuration incorporates a 1.0 m (3.3 feet) unarmored FluidLoc cable (Option 10-00) and includes multiple agency hazardous area approvals (Option 05) such as CSA, ATEX, and IECEx. Unlike variants featuring custom unthreaded sections, a longer case, or stainless steel armor protection, this probe provides a direct-exit unarmored configuration ideal for installation environments with pre-existing protective conduit. It is typically used for large-target non-contact eddy-current measurements such as steam turbine differential expansion, large shaft axial position, and reciprocating compressor rod-drop monitoring.

Features

• M30x2 metric threaded case option for direct installation into threaded machine housings.
• Unarmored 75 ohm triaxial FluidLoc probe cable with a 1.0 m total length.
• Multiple agency approvals including CSA, ATEX, and IECEx for hazardous area installations.
• Viton O-ring and compression seal structure to prevent fluid leakage through the case.
• Polyetheretherketone probe tip material for compatibility with harsh industrial fluids.

Applications

• Steam turbine differential expansion monitoring on mid-size to large machine trains.
• Large-target shaft axial displacement and rotor position measurements.
• Rod-drop monitoring in reciprocating compressor installations.
• Machinery protection systems requiring large-target non-contact eddy-current sensing.

Ordering Information

Technical Specifications

Installation Guidelines

• Maintain a minimum target diameter of 61 mm (2.4 in) of flat steel to preserve the linear calibration range.
• Ensure correct probe gapping of approximately -1.5 Vdc to -11.5 Vdc (0.63 mm to 13.33 mm) within the linear range.
• Tighten the M30x2 metric threaded case to a recommended torque of 68 N-m (50 ft-lb) with a maximum limit of 163 N-m (120 ft-lb).
• Protect the coaxial cable connectors using fluorosilicone connector protectors to prevent moisture and oil ingress.
• Connect the probe to a compatible 3300 XL 25 mm extension cable and Proximitor sensor for a total system length of 5.0 m or 9.0 m as required.

Compliance and Certifications

• CE Mark compliant
• CSA, ATEX, and IECEx approvals for hazardous areas (Option 05)
• Intrinsically Safe (Ex ia IIC T5...T1 Ga) when installed with intrinsically safe barriers or galvanic isolators
• Non-Incendive (Ex nA IIC T5...T1 Gc) and (Ex ec IIC T5...T1 Gc) for Zone 2 hazardous areas