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

Product Technical IntroductionThe 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 LogicBase Model: 21000External Proximity Probe Housing AssemblyProbe Option: -28Equipped with 3300 XL 8mm probe with connectorCable Length: -05Probe cable length measures 0.5 meters (20 inches)Standoff Adapter: -00Standard configuration with no standoff adapterProbe Penetration: -077Total penetration depth into machine is 7.7 inchesFitting Option: -03Includes 3/4-14 NPT plug, reducer, and multi-size cable seal gripsMounting Thread: -02Utilizes a 3/4-14 NPT mounting interfaceOiltech Controls Limited’s InsightThe 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 & DiagnosticsCritical 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 SupportShipping 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 GuideHow 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: [email protected] , 86 158 8020 0923Copyright © 2026 Oiltech Controls Limited. All rights reserved. Original Source: https://www.oiltechcontrols.com/ All rights reserved.