Bently 330708-20-50-10-02-00

Product Overview The 330708-20-50-10-02-00 is a proximity probe from Bently Nevada’s 3300 XL 11mm sensor system. This probe features 5/8-18 UNF thread, 2.0 inch (50.8mm) unthreaded length, 5.0 inch (127mm) overall case length, 1.0 meter integral cable, non-armored construction, and no agency approval. The very long 5.0 inch case length is designed for the deepest mounting applications where the probe must extend significantly beyond the mounting surface.

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Description

Bently 330708-20-50-10-02-00

Technical Specifications

Parameter Category Specific Specification
Manufacturer Bently Nevada (Baker Hughes)
Product Family 3300 XL 11mm Proximity Transducer System
Thread Specification 5/8-18 UNF threads
Unthreaded Length 20 = 2.0 inches (50.8 mm)
Overall Case Length 50 = 5.0 inches (127.0 mm)
Total Cable Length 10 = 1.0 meter (3.3 feet)
Cable Option 02 = Non-armored (standard)
Agency Approval 00 = No agency approval required
Probe Diameter 11.0 mm
Linear Range 4.0 mm (160 mils)
Sensitivity 3.94 V/mm (100 mV/mil) with system
Target Material Calibrated for AISI 4140 steel
Probe Tip Material Polyphenylene Sulfide (PPS)
Probe Case Material AISI 304 stainless steel
Operating Temperature (Probe) -51°C to +177°C (-60°F to +350°F)
Storage Temperature -51°C to +260°C (-60°F to +500°F)
Pressure Sealing Viton O-ring standard
DC Resistance 5.9 ± 0.5 ohms (for 1.0m cable)
Typical Capacitance 69.9 pF/meter
Weight Approximately 0.25 kg

Key Features

  • Very Long 5.0in Case Length: Longest standard case length for very deep mounting applications
  • 2.0in Unthreaded Length: Substantial extension beyond mounting surface
  • 5/8-18 UNF Thread: Common imperial thread for North American machinery
  • 11mm Diameter with 4mm Range: Large linear range
  • TipLoc and CableLoc Technology: Strong mechanical bonds
  • ClickLoc Connector: Reliable connection
  • Full System Interchangeability: Interchangeable within 3300 XL 11mm system

Application Scenarios

  • Very thick-walled bearing housings: Monitors shaft vibration through extremely thick bearing caps
  • Large steam turbine casings: Measures shaft position through thick high-pressure turbine casings
  • Heavy-duty compressor cylinders: Monitors shaft vibration through thick compressor cylinder walls
  • Large hydro turbine housings: Measures shaft vibration through thick concrete and steel housings
  • Nuclear reactor coolant pumps: Monitors shaft vibration through thick pressure boundary walls
  • Large diesel engine blocks: Measures crankshaft vibration through thick engine block castings
  • Heavy forging presses: Monitors ram position through thick press frames
  • Large marine propulsion shafts: Measures shaft vibration through thick stern tube castings

Performance Parameters Identical to other 3300 XL 11mm probes. The very long case provides excellent heat conduction from the probe tip to the mounting structure.

Material Composition Identical to other 3300 XL 11mm probes with additional stainless steel mass for the long case.

Structural Characteristics Cylindrical stainless steel case with 5/8-18 UNF thread and 2.0 inch smooth unthreaded section. The 5.0 inch overall length provides 3.0 inches of threaded section plus 2.0 inches of unthreaded section. This is one of the longest standard case lengths in the 330708 series. The probe tip is at the end of the 2.0 inch extension.

Working Principle Identical to other 3300 XL 11mm probes.