Bently Nevada 330876-02-50-01-00 3300 XL 50 mm Proximity Probe Transducer

Description

The Bently Nevada 330876-02-50-01-00 is a 3300 XL 50 mm proximity probe designed for use in the 3300 XL 50 mm Proximity Transducer System. It features an M14 × 1.5 threaded probe case, a 5.0-meter integrated probe cable, and a high-temperature FluidLoc cable with stainless steel armor for increased mechanical protection in demanding industrial environments. The probe is used together with a compatible 3300 XL 50 mm extension cable and 3300 XL 50 mm Proximitor Sensor to provide non-contact measurement of shaft position and vibration. 

Parameter

Model: 330876-02-50-01-00 3300 XL 50 mm Proximity Probe
Probe Case Type Option: 02-M14x1.5 Thread
Total Length Option: 50-5.0 meters (16.4 feet)
ArmorOption: 01-High Temperature FluidLoc Cable with Armor
Agency Approval Option: 00-Not required  

Frequently asked questions

Q:What is the Bently Nevada 330876-02-50-01-00？
A:The Bently Nevada 330876-02-50-01-00 is a heavy-duty 3300 XL 50 mm Proximity Probe designed for measuring very large mechanical displacements on massive rotating machinery, such as industrial steam turbines.

Q:What is the 330876-02-50-01-00 primary purpose and measurement application of a massive 50 mm probe?
A:Smaller 8 mm probes lack the range required for massive machinery. The 330876 probe has a huge internal coil that delivers a maximum linear range of 27.9 mm (1100 mils), making it the longest linear range option in the Bently Nevada eddy-current line. It is primarily applied to measure Differential Expansion (DE) or Rotor Expansion (RX) on large steam turbine generators.

Q:Can I connect 330876-02-50-01-00  probe directly to a standard 3300 XL 8 mm Proximitor sensor?
A:Absolutely not. The huge 50 mm probe head requires specific drive frequencies and impedance matching. It must strictly be matched with a 3300 XL 50 mm Extension Cable and a 3300 XL 50 mm Proximitor Sensor to generate an accurate linear output. Additionally, the combined length of the probe cable (5.0 m) and extension cable must match the total calibration length of the Proximitor sensor.

Application areas

The Bently Nevada 330876-02-50-01-00 is an ultra-long-range (27.9 mm / 1,100 mils) proximity probe designed primarily for the asset protection of massive rotating machinery. Its core application areas include:

• Heavy-Duty Gas Turbines: Monitoring massive axial thermal movements and rotor expansion on F-class or H-class industrial gas turbines.
• Conduit-Free Turbine Casing Routing: The 01 stainless steel armor option enables direct installation around hot turbine casings without separate rigid metal conduits. It fully withstands heavy maintenance foot traffic, dropped heavy tools, and severe physical crushing.
• High Moisture & Oil-Mist Zones: The integrated FluidLoc cable core prevents high-pressure oil mist or steam condensate inside the bearing housing from wicking along the wire strands into external junction boxes, safeguarding the entire loop.
• Thermal & Nuclear Power Generation: Standard deployment on the turbine deck of supercritical, ultra-supercritical fossil-fuel plants (e.g., 300MW to 1000MW units) and utility-scale nuclear power stations for critical turbomachinery asset protection.

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