{"product_id":"bently-nevada-21000-28-05-00-071-03-02-21000-series-proximity-probe-housing-assembly","title":"Bently Nevada 21000-28-05-00-071-03-02 21000 Series Proximity Probe Housing Assembly","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eFor industrial machinery protection architectures requiring external transducer mounting and micro-adjustable insertion depths, the Bently Nevada 21000-28-05-00-071-03-02 provides a ruggedized, field-proven enclosure engineered to protect critical proximity sensors. This housing assembly is configured to host a \u003cstrong\u003e3300 XL 8 mm proximity probe\u003c\/strong\u003e, shielding the sensor from physical impacts, environmental contaminants, and hazardous area conditions. Constructed with a heavy-duty \u003cstrong\u003emachined aluminum body\u003c\/strong\u003e and a corrosion-resistant \u003cstrong\u003e304 stainless steel sleeve\u003c\/strong\u003e, it ensures high mechanical integrity on high-speed rotating assets such as steam turbines, centrifugal compressors, and large industrial pumps.\u003c\/p\u003e\n\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThis model facilitates on-site probe gapping and maintenance without requiring the de-coupling or disassembly of the main machine casing. With a \u003cstrong\u003e7.1-inch probe penetration depth\u003c\/strong\u003e and a 3\/4-14 NPT mounting thread connection, it allows for direct and precise positioning relative to the target shaft.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.5rem; margin-top: 2rem;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eTransducer Compatibility:\u003c\/strong\u003e Factory-configured for the 3300 XL 8 mm proximity probe (Option 28) with multiple global hazardous area approvals.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eOptimized Internal Cable Length:\u003c\/strong\u003e Features a 0.5-meter (20-inch) probe cable length (Option 05) to ensure secure, low-loss routing to local junction boxes.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003ePrecision Penetration:\u003c\/strong\u003e 7.1-inch sleeve length (Option 071) designed for deep machine casing penetration and exact sensor-to-target alignment.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eComprehensive Fittings Kit:\u003c\/strong\u003e Equipped with a 3\/4-14 NPT plug, a 3\/4-14 to 1\/2-14 NPT reducer, and a specialized multi-grommet cable seal grip to accommodate varying field wiring sizes.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eIndustrial Material Configuration:\u003c\/strong\u003e High-grade aluminum housing cover coupled with a rugged 304 stainless steel sleeve for resistance to oil, water, and atmospheric chemical exposure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.5rem; margin-top: 2rem;\"\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eRadial vibration and axial position measurements on high-pressure steam turbines.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eShaft centerline and vibration monitoring in industrial turbo-compressors and gearboxes.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eContinuous thrust position monitoring in hydroelectric generator assemblies.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eHeavy industrial process pumps operating under high mechanical stress or harsh ambient environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.5rem; margin-top: 2rem;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2b6cb0;\"\u003e\n        \u003cth style=\"text-align: left; padding: 8px; font-weight: bold; color: #1a365d;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 8px; font-weight: bold; color: #1a365d;\"\u003eSpecification Values\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eBently Nevada\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eModel Part Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e21000-28-05-00-071-03-02\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eCompatible Probe Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e3300 XL 8 mm Proximity Probe (Option 28)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eProbe Cable Length\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e0.5 meter (20 inches) (Option 05)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eStandoff Adapter Option\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eNo standoff adapter (Option 00)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eProbe Penetration Depth\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e7.1 inches (approx. 180.3 mm) (Option 071)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eMounting Thread Option\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e3\/4-14 NPT (Option 02)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eIncluded Fittings\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eOne 3\/4-14 NPT plug; one 3\/4-14 to 1\/2-14 NPT reducer; one cable seal grip (with grommets for 1\/8 to 3\/16, 1\/4 to 5\/16, and 5\/16 to 3\/8 inch cables)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eHousing Cover Material\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eMachined Aluminum\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eSleeve Material\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e304 Stainless Steel\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eApprovals\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eMultiple hazardous area certifications (when paired with compliant 3300 XL components)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eShipping Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e2.0 kg (approx. 4.4 lbs)\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.5rem; margin-top: 2rem;\"\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThis unit has been legacy-replaced in newer OEM architectures by model code \u003cstrong\u003e21000-16-05-00-071-03-02\u003c\/strong\u003e. When planning a modern field upgrade or replacement, verify if your vibration monitoring system uses standard 3300 XL 8 mm probes (Option 28) or the newer 11 mm setups (Option 16), as changing the sensor model dictates a matching proximitor calibration sweep adjustment.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eIn high-temperature turbine casings, thermal expansion rates differ significantly between the aluminum housing body and the 304 stainless steel sleeve. Ensure that clearance fits around the sleeve account for thermal elongation during startup phases to prevent mechanical binding or sensor drift.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #2b6cb0; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eCommissioning \u0026amp; Installation Advice\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eAlways apply a high-quality thread sealant or anti-seize paste directly to the 3\/4-14 NPT mounting threads to prevent galvanic lock-up over long deployment intervals. To maintain IP integrity, select the exact match grommet size from the included Option 03 pack to ensure the cable seal grip achieves a completely hermetic fit around the probe extension lead.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.5rem; margin-top: 2rem;\"\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem; border-radius: 4px;\"\u003e\n  \u003cstrong style=\"color: #9b2c2c; display: block; margin-bottom: 0.5rem;\"\u003eCRITICAL WARNING: INDUSTRIAL FIELD SAFETY\u003c\/strong\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0;\"\u003ePrior to housing installation or depth calibration adjustments, completely de-energize the monitored machinery and verify that no shaft rotation or high-pressure gas bypass conditions exist. Standard safety lock-out\/tag-out (LOTO) protocols must be actively enforced during proximity system mounting.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin-top: 1rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cdiv style=\"display: flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 50%; background-color: #2b6cb0; color: #ffffff; font-weight: bold; margin-right: 15px; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003e\n      \u003cstrong\u003eMechanical Alignment Check:\u003c\/strong\u003e Inspect the mounting port threads (3\/4-14 NPT) on the machine casing to ensure they are clean, free of debris, and cut perpendicular to the target shaft centerline.\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cdiv style=\"display: flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 50%; background-color: #2b6cb0; color: #ffffff; font-weight: bold; margin-right: 15px; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003e\n      \u003cstrong\u003eSensor Gapping Calibration:\u003c\/strong\u003e Carefully slide the proximity probe into the sleeve and adjust the axial distance relative to the target surface. Verify the target distance using a digital multimeter checking the DC voltage output on the Proximitor sensor before final physical lock-down.\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cdiv style=\"display: flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 50%; background-color: #2b6cb0; color: #ffffff; font-weight: bold; margin-right: 15px; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003e\n      \u003cstrong\u003eEnvironmental Sealing:\u003c\/strong\u003e Tighten the housing cover and route the 0.5-meter probe cable through the selected Option 03 conduit fitting. Ensure the outer cable seal grip is fully compressed to isolate the housing interior from external fluid contamination.\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52668309274987,"sku":"21000-28-05-00-071-03-02","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/21000-28-05-00-071-03-02-m0eq1ntvptw_b8347e80-cf43-4471-b50b-615dd91ab7fb.jpg?v=1765520790","url":"https:\/\/www.plcprotech.com\/ms\/products\/bently-nevada-21000-28-05-00-071-03-02-21000-series-proximity-probe-housing-assembly","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}