Bently Nevada 330876-01-90-00-00 3300 XL 50 mm Proximity Probe

Description

330876-01-90-00-00 specifies a 3300 XL 50 mm proximity probe configuration with a 1/2-20 threaded case, a 9.0 meter total cable length, an unarmored FluidLoc cable, and no agency approvals.

This non-contact eddy-current displacement probe is designed for large-target applications such as steam turbine differential expansion (DE) measurements. The system has a wide linear range of 27.9 mm (1100 mils) and provides an Average Scale Factor (ASF) of 394 mV/mm (10 mV/mil). This 9.0 meter version connects directly to a 9.0 meter Proximitor Sensor, eliminating the need for a separate extension cable. The integrated High Temperature FluidLoc coaxial cable is PFA-insulated and sealed against moisture at both the front and rear of the probe body.

Features

• 1/2-20 UNF threaded AISI 304 stainless steel case (Option 01)
• 9.0 meter total length unarmored High Temperature FluidLoc PFA-insulated triaxial cable
• PPS (polyphenylene sulfide) probe tip material with front and rear dual-seal design
• High-temperature ClickLoc miniature male coaxial connector with removable routing collar
• Gold-plated brass and gold-plated beryllium copper contacts for electrical signal integrity
• Capable of continuous operation up to 200 degC (392 degF) and short-term survival up to 250 degC (482 degF)
• Average Scale Factor of 394 mV/mm (10 mV/mil) nominal when used with compatible 3300 XL 50 mm Proximitor Sensor

Applications

• Steam turbine differential expansion (DE) measurement
• Large turbine rotor axial position monitoring
• Large shaft vibration and position monitoring in harsh power generation environments
• Industrial rotating machinery protection systems requiring extended linear range

Ordering Information

Technical Specifications

Installation Guidelines

• Maximum Thread Engagement: 0.75 in (19 mm) for 1/2-20 threaded case. Exceeding this may cause binding during installation.
• Torque Limits: Maximum rated torque for threaded probe cases is 45 N-m (400 in-lb).
• Connector-to-Connector Torque: Hand tight, with a recommended torque of 0.565 N-m (5 in-lb). Do not use pliers.
• Routing: Utilize the removable ClickLoc collar to facilitate routing through tight conduit paths or small openings.
• Moisture Protection: Install the provided connector protectors to keep the connection points free of water, oil, and other contaminants.
• Minimum Bend Radius: Maintain a minimum cable bend radius of 25.4 mm (1.0 in) at all points along the run.

Compliance and Certifications