{"product_id":"21000-28-05-15-050-03-02-explosion-proof-housing-bently-nevada","title":"21000-28-05-15-050-03-02 Explosion-Proof Housing - Bently Nevada","description":"\u003ch3\u003e\u003cb\u003eProduct Overview\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003e21000-28-05-15-050-03-02\u003c\/strong\u003e is an aluminum-body proximity probe housing assembly engineered by \u003cstrong style=\"color: #0056b3;\"\u003eBently Nevada\u003c\/strong\u003e for externally mounted 3300 XL eddy current transducers. Designed in full compliance with American Petroleum Institute (API) 670 guidelines, this CSA-certified explosion-proof enclosure safeguards internal reverse-mount probe connections against harsh atmospheric contaminants, mechanical impacts, and hazardous gas leaks.\u003c\/p\u003e\n\u003cp\u003eConstructed with an anodized aluminum dome cover, a 304 stainless steel probe sleeve, and Viton O-ring seals, the \u003cstrong style=\"color: #0056b3;\"\u003e21000-28-05-15-050-03-02\u003c\/strong\u003e allows engineers to perform external probe replacement or gap readjustment without dismantling main machine casing covers. The integrated standoff adapter (1.5-inch) and 5.0-inch penetration sleeve accommodate deep-seated bearing ports on heavy industrial turbomachinery.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003ePart Number Configuration Breakdown\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eOrdering Suffix Structure: 21000-AA-BB-CC-DDD-EE-FF\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e21000\u003c\/b\u003e — Base Housing Model (Aluminum Enclosure Body with 304 Stainless Steel Probe Sleeve)\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e-28- [AA: Probe Option]\u003c\/b\u003e — 3300 XL 8 mm Reverse-Mount Probe with Selectable Hazardous Area Approvals\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e-05- [BB: Cable Length]\u003c\/b\u003e — 0.5 Meter (20 Inches) Probe Cable Length\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e-15- [CC: Standoff Adapter]\u003c\/b\u003e — 1.5 Inch (38 mm) Minimum Length Standoff Adapter\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e-050- [DDD: Penetration]\u003c\/b\u003e — 5.0 Inches (127 mm) Probe Sleeve Penetration Depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e-03- [EE: Fitting Assembly]\u003c\/b\u003e — One 3\/4-14 NPT Plug, One 3\/4-to-1\/2 NPT Reducer, One Multi-Grommet Cable Seal Grip\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e-02 [FF: Mounting Thread]\u003c\/b\u003e — 3\/4-14 NPT Process Connection Mounting Thread\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eProduct Number\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong style=\"color: #0056b3;\"\u003e21000-28-05-15-050-03-02\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eBrand \u0026amp; Manufacturer\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong style=\"color: #0056b3;\"\u003eBently Nevada\u003c\/strong\u003e \/ Baker Hughes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSystem Compatibility\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong style=\"color: #0056b3;\"\u003e3300 XL 8 mm\u003c\/strong\u003e Machinery Protection Transducers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eEnclosure Material\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum Housing Body \/ AISI 304 Stainless Steel Sleeve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eEnvironmental Protection\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eCSA Type 4 Enclosure \/ Explosion-Proof Class I Div 1 Rated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eStandards Compliance\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eFully Compliant with API 670 5th Edition Standard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eProcess Connection Thread\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/4-14 NPT External Mounting Threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eStandoff Adapter Length\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e1.5 Inches (38 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSleeve Penetration Depth\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e5.0 Inches (127 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eConduit Fittings Included\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/4 NPT Plug, 3\/4 to 1\/2 Reducer, Cable Seal Grip with 3 Grommet Sizes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eGrommet Sealing Ranges\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/8–3\/16 inch, 1\/4–5\/16 inch, and 5\/16–3\/8 inch Cable Outer Diameters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eNet Assembly Weight\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e1.1 kg (2.4 lbs) typical without auxiliary fittings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eDiagnostic Capabilities \u0026amp; Structural Advantages\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eAPI 670 External Accessibility:\u003c\/b\u003e Enables in-situ inspection and gap voltage verification without opening machine oil seals or exposing technicians to hot internal lubricants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eModular Cable Seal Grip:\u003c\/b\u003e Triple-grommet cable grip prevents moisture ingress and oil migration from entering the field wiring conduit system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExplosion-Proof Enclosure Integrity:\u003c\/b\u003e Certified CSA Type 4 housing isolates electrical sparking risks within hazardous gas or volatile vapor environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThreaded Sleeve Depth Fine-Tuning:\u003c\/b\u003e Precision internal threads on the 304 SST sleeve allow micro-adjustments during static gap calibration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eTarget Machinery Applications\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eTurbine Bearing Housings:\u003c\/b\u003e Ideal for monitoring journal radial vibration and axial thrust position on steam or gas turbines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHeavy Centrifugal Compressors:\u003c\/b\u003e Seals process gas leaks while providing stable transducer mounting on high-pressure compressor frames.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIndustrial Gearboxes \u0026amp; Boiler Feed Pumps:\u003c\/b\u003e Protects critical monitoring probes against high-vibration washdowns, ambient humidity, and outdoor weather exposure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eInstallation \u0026amp; Operational Procedures\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eApply Thread Sealant:\u003c\/b\u003e Wrap 3\/4 NPT mounting threads with PTFE tape or approved pipe compound before torquing into the bearing cap port.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVerify Sleeve Insertion Clearance:\u003c\/b\u003e Ensure the total penetration (5.0 inches) plus standoff (1.5 inches) positions the probe tip within the linear range of the target shaft.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSelect Correct Grommet Size:\u003c\/b\u003e Choose the appropriate rubber grommet matching your field wiring triad outer diameter to preserve moisture barrier integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCheck Max Dimension Rules:\u003c\/b\u003e Confirm the combined sleeve (C) and adapter (D) dimensions remain under the 13.5-inch maximum threshold for 0.5m probe cable limits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSelection Comparison \u0026amp; Technical Trade-Offs\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eHousing Feature\u003c\/th\u003e\n\u003cth\u003e21000-28-05-15-050-03-02 (Current Spec)\u003c\/th\u003e\n\u003cth\u003e\n\u003ca href=\"https:\/\/www.plcsparehub.com\/products\/bently-nevada-21000-28-05-20-051-04-02-proximity-probe-housing-assembly\"\u003e21000-28-05-20-051-04-02\u003c\/a\u003e (Alternative Variant)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eStandoff Adapter Length (CC)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e1.5 Inches (38 mm)\u003c\/td\u003e\n\u003ctd\u003e2.0 Inches (51 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eProbe Penetration Depth (DDD)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e5.0 Inches (127 mm)\u003c\/td\u003e\n\u003ctd\u003e5.1 Inches (130 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFitting Option (EE)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e-03 (Standard Seal Grip + Reducer)\u003c\/td\u003e\n\u003ctd\u003e-04 (Dual Port Conduit Accessories \/ Heavy Seals)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eMounting Thread (FF)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/4-14 NPT\u003c\/td\u003e\n\u003ctd\u003e3\/4-14 NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cb\u003eTechnical Recommendation:\u003c\/b\u003e The \u003cstrong style=\"color: #0056b3;\"\u003e21000-28-05-15-050-03-02\u003c\/strong\u003e assembly is optimal for standard API 670 mounting ports with a 1.5-inch standoff clearance requirement. However, if your bearing housing geometry features thicker insulation jackets or requires an extra 0.1-inch reach along with specialized dual-port conduit fittings, choose the \u003ca href=\"https:\/\/www.plcsparehub.com\/products\/bently-nevada-21000-28-05-20-051-04-02-proximity-probe-housing-assembly\"\u003e21000-28-05-20-051-04-02\u003c\/a\u003e version to ensure proper structural standoff clearance.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003ePackaging, Logistics \u0026amp; Warranty Terms\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eLead Time \u0026amp; Dispatch:\u003c\/b\u003e In-stock units ready for same-day or next-business-day factory dispatch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInternational Logistics:\u003c\/b\u003e Expedited global delivery via DHL Express, FedEx, and UPS Priority.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFactory Condition:\u003c\/b\u003e 100% Brand New and Original in sealed factory packaging with mounting accessories included.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty Guarantee:\u003c\/b\u003e Covered by a comprehensive 12-month factory quality replacement warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eEngineering Procurement Guide\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCalculate Total Insertion Depth:\u003c\/b\u003e Add standoff length (1.5 in) to penetration depth (5.0 in) to determine physical interference with internal bearing structures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eConfirm Cable Length Matching:\u003c\/b\u003e Remember that a 0.5-meter internal probe cable must connect to a 4.5-meter extension cable for proper 5.0-meter system tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVerify Hazardous Approvals:\u003c\/b\u003e Ensure the -28 probe option matches the hazardous area classification required by plant safety standards (e.g., Class I Div 1 \/ Zone 1).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions (FAQ)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: How does the reverse-mount probe design function inside this housing body?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: The reverse-mount probe inserts from the rear of the stainless steel sleeve, allowing engineers to pull the transducer without unscrewing the housing from the process vessel.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: What field symptoms indicate an improper cable seal grommet installation?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Moisture accumulation inside the dome cover or oil leaching into the field conduit system signals an incorrectly sized grommet selection.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Why is aluminum chosen for the housing body instead of 304 stainless steel?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Aluminum reduces overall weight overhead on floating bearing covers while offering excellent corrosion resistance, whereas all wet\/exposed sleeve parts retain 304 stainless steel strength.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Can I adjust the probe target gap while the machinery protection monitor is online?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes, unscrewing the dome cover grants access to the internal probe sleeve locknuts, letting you monitor DC gap voltage live on a multimeter.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: What precautions are necessary for the 3\/4-14 NPT process mounting thread?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Ensure thread engagement is torqued securely to prevent oil mist leakage, but do not over-torque past mechanical limits to avoid cracking cast aluminum bosses.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB's Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eDuring an overhaul of a refinery gas recycling turbine, plant instrument technicians struggled with frequent signal loss caused by oil mist creeping into field junction boxes. The existing non-API probe assemblies lacked dynamic sealing along the transducer lead cables.\u003c\/p\u003e\n\u003cp\u003eOur engineering team specified the \u003cstrong style=\"color: #0056b3;\"\u003e21000-28-05-15-050-03-02\u003c\/strong\u003e housing assembly as a direct drop-in replacement. By utilizing its integrated multi-grommet cable seal grip and 3\/4 NPT explosion-proof body, the plant sealed off oil migration entirely. The 1.5-inch standoff and 5.0-inch sleeve aligned perfectly with the shaft target, stabilizing gap voltage readings and protecting critical turbomachinery assets from unwanted trip shutdowns.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/21000_CA21000_Proximity_Probe_Housing_Assembly_007eb544-fd00-4b41-a22e-c953629fa721.png?v=1784785784\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":45013974024374,"sku":"21000-28-05-15-050-03-02","price":187.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/21000-28-10-30-018-04-02_63cd3c56-a67d-4887-bc48-235b932077b0.jpg?v=1789009336","url":"https:\/\/www.plcsparehub.com\/products\/21000-28-05-15-050-03-02-explosion-proof-housing-bently-nevada","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}