Bently Nevada 330851-05-000-040-50-01-05 3300 XL 25 mm Proximity Probe

Description

330851-05-000-040-50-01-05: This 3300 XL 25 mm proximity probe configuration is specified by its non-standard 1-1/2-12 UNF English thread, 0.0 inches of unthreaded length, 4.0 inches of overall case length, 5.0-meter system length, stainless steel armor, and multiple hazardous area approvals. Operating as an eddy-current non-contact displacement measurement transducer within the 3300 XL 25 mm proximity transducer system, it is optimized for mid-to-large machinery thrust position, rod drop, and differential expansion monitoring.

Unlike standard configurations that rely on smaller-diameter probes, this 25 mm probe offers an extended 12.7 mm (500 mils) linear range. Robust protection against mechanical wear and fluid bypass is achieved through Option 01 flexible AISI 302 stainless steel armor coated in a perfluoroalkoxyethylene (PFA) outer jacket, standard front/rear tip sealing, and triaxial FluidLoc cabling.

Features

• Option 05 Case Type: Constructed of durable AISI 304 stainless steel with a non-standard 1-1/2-12 UNF English thread.
• Option 01 Protective Armor: Flexible AISI 302 stainless steel armor with a standard outer PFA jacket provides mechanical safety.
• FluidLoc Triaxial Cable: Standard 75 Ohm triaxial cable featuring integrated front and rear seals to isolate the probe tip from moisture ingress.
• Zero Unthreaded Length: The 0.0-inch unthreaded case profile (Option 000) maximizes thread engagement and physical mounting stability.
• 5.0-Meter System Length: Option 50 designates a 5.0-meter system length calibrated for direct connection to a 3300 XL 25 mm Proximitor sensor.
• Option 05 Approvals: Certified for hazardous environments with multiple global agency approvals, including ATEX, IECEx, and CSA.

Applications

• Steam turbine differential expansion (DE) tracking and axial growth monitoring
• Thrust position measurement on large industrial turbomachinery shafts
• Reciprocating compressor piston rod-drop style tracking
• Eddy-current dynamic displacement profiling for large mechanical targets

Ordering Information

Technical Specifications

Installation Guidelines

• Torque Limits: When securing the 1-1/2-12 threaded case, do not exceed the maximum rated torque of 163 N-m (120 ft-lb). The recommended mounting torque is 68 N-m (50 ft-lb).
• Shielding Integrity: Maintain continuous coaxial shielding from the probe lead through to the Proximitor terminal strip. Ensure the shield is isolated from ground loops.
• Moisture Protection: Fully engage the Viton O-ring and compression seal during installation. Ensure the supplied fluorosilicone connector protectors are deployed and hand-tightened.
• Wrench Flat Clearance: Utilize the integrated 1-5/16 in wrench flats to adjust probe depth. Secure the locking nut using standard predrilled safety wire holes.

Compliance and Certifications

• ATEX/IECEx: Ex ia IIC T5...T1 Ga, Ex ia IIIC T90 degC...T280 degC Dc (for EPL Ga and Gc); Ex nA/ec IIC T5...T1 Gc
• cNRTLus: Class I, Zone 0: AEx/Ex ia IIC T5...T1 Ga; Class I, Division 1, Groups A, B, C, D; Class II, Division 1, Groups E, F, G; Class III
• CE Mark: Compliant with European RFI/EMI requirements
• RoHS: Fully compliant with restriction of hazardous substances standards