Bently Nevada 21000-28-05-00-077-03-02 Proximity Housing API 670

Product Technical Introduction

• The 21000-28-05-00-077-03-02 is a professional-grade Bently Nevada 21000 Series proximity probe housing.
• It provides an explosion-proof enclosure for the 3300 XL 8mm proximity transducer system.
• This assembly is fully compliant with API 670 standards for externally mounted vibration sensors.
• The dual-material construction features a robust aluminum body paired with a 304 stainless steel sleeve.
• Engineered for Class I Division 1 & 2 environments, it ensures maximum safety in hazardous industrial zones.

Configuration Breakdown & Suffix Logic

• Base Model: 21000
  • External Proximity Probe Housing Assembly
• Probe Option: -28
  • Equipped with 3300 XL 8mm probe with connector
• Cable Length: -05
  • Probe cable length measures 0.5 meters (20 inches)
• Standoff Adapter: -00
  • Standard configuration with no standoff adapter
• Probe Penetration: -077
  • Total penetration depth into machine is 7.7 inches
• Fitting Option: -03
  • Includes 3/4-14 NPT plug, reducer, and multi-size cable seal grips
• Mounting Thread: -02
  • Utilizes a 3/4-14 NPT mounting interface

Oiltech Controls Limited’s Insight

• The 21000-28-05-00-077-03-02 serves as a critical protective barrier against mechanical and environmental stress.
• By using a reverse mount probe design, technicians can adjust or replace the sensor without opening the machine.
• Our engineering team highlights the IP66/Type 4 rating, which prevents oil ingress into the conduit system.
• The aluminum body offers excellent heat dissipation while keeping the overall assembly weight under 1.1 kg.
• This specific 21000 series build is a preferred choice for retrofitting vibration monitoring on aging turbines.

Applications & Diagnostics

• Critical Machinery: Best suited for steam turbines, centrifugal compressors, and gearbox shaft monitoring.
• Position Sensing: Ideal for tracking axial thrust and radial vibration in high-speed rotating equipment.
• Diagnostic Support: Provides stable gap voltage readings to diagnose bearing wear or shaft misalignment.
• Rugged Use: Designed for oil and gas refineries, power plants, and chemical processing facilities.

Logistics & Warranty Support

• Shipping Methods: Global express delivery via FedEx, UPS, and DHL.
• Condition: Guaranteed New & Original in factory-sealed industrial packaging.
• Warranty: Includes a comprehensive 12-Month Factory Warranty.

Professional FAQ & Selection Guide

• How do I confirm the penetration depth for the 21000-28-05-00-077-03-02?
  Measure the distance from the mounting boss face to the shaft surface. The 077 suffix means 7.7 inches.
• Is the probe included in this specific part number?
  Yes, the -28 suffix confirms a 3300 XL 8mm probe is pre-installed in the housing.
• What conduit sizes are supported by the fitting option 03?
  It includes a reducer for 1/2-14 NPT and grommets for cables from 1/8 to 3/8 inches.
• Can this housing handle extreme outdoor temperatures?
  Yes, it is certified for operation in ambient temperatures ranging from -50°C to +80°C.
• Why use the 21000 series instead of internal mounting?
  External housings like the 21000 allow for “on-the-fly” adjustments without a total machine shutdown.

Contact Information Inquiries: info@oiltechcontrols.com , +86 158 8020 0923

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