{"product_id":"bently-nevada-21000-34-10-00-085-04-02-21000-series-proximity-probe-housing-assembly","title":"Bently Nevada 21000-34-10-00-085-04-02 21000 Series Proximity Probe Housing Assembly","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eDesigned for harsh industrial environments, the \u003cstrong\u003eBently Nevada 21000-34-10-00-085-04-02\u003c\/strong\u003e mechanical enclosure provides robust environmental protection and precise positioning for proximity transducer probes within critical machinery monitoring paths. This 21000 series aluminum housing facilitates the external installation and adjustment of proximity probes, allowing engineers to calibrate probe-to-shaft clearance without dismantling the machine casing. Constructed from high-grade, copper-free aluminum, it delivers outstanding structural integrity and defense against corrosive atmospheres in modern industrial plants.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 20px; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobust Enclosure Protection:\u003c\/strong\u003e Epoxy-coated, copper-free aluminum body designed to shield proximity probes from mechanical impact, dust, moisture, and chemical exposure.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExternal Adjustability:\u003c\/strong\u003e Enables precise mechanical gapping and sensor adjustment from outside the machinery case.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExplosion-Proof Certified:\u003c\/strong\u003e Meets strict industrial safety standards for deployment in hazardous areas when installed with approved fittings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Standoff Adapter:\u003c\/strong\u003e Simplifies mounting configurations on curved or insulated machinery casings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 20px; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003eSteam, gas, and hydro turbine shaft vibration monitoring.\u003c\/li\u003e\n  \u003cli\u003eCentrifugal and reciprocating compressor bearing housing protection.\u003c\/li\u003e\n  \u003cli\u003eLarge-scale industrial pumps, gearboxes, and electric motors.\u003c\/li\u003e\n  \u003cli\u003eAxial thrust and radial position measurement systems in petrochemical plants.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications Table\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; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold;\"\u003eSpecification\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: 10px; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eBently Nevada\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e21000-34-10-00-085-04-02\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eHousing Material\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eCopper-free Aluminum (Epoxy-coated)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eProbe Option (-34)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e3300 XL 8 mm proximity probe\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eProbe Cable Length (-10)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e1.0 meter (3.3 feet)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eConnector Option (-00)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eMiniature coaxial connector, not installed\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eStandoff Adapter Length (-085)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e8.5 inches (216 mm)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eThread Option (-04)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eM20 x 1.5\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eAgency Approval Option (-02)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eATEX \/ IECEx \/ CSA Hazardous Area Approvals\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eEnvironmental Protection\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eIP66 \/ NEMA 4X equivalent\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e2.45 kg (5.40 lbs)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003ePackage Dimensions (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e350 mm x 180 mm x 150 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\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; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold;\"\u003eInterface Component\u003c\/th\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold;\"\u003eFunction and Assignment\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: 10px; font-weight: bold;\"\u003eStandoff Mount Thread\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eM20 x 1.5 connection to the machine casing\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eInternal Probe Cable\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eCoaxial transmission line routing signal to the external Proximitor Sensor\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eConduit Entry Port\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eConnection port for protective flex conduit routing the probe cable\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe 21000 series features a copper-free aluminum housing, which represents the standard mechanical protection tier. For applications involving extremely aggressive chemical environments or offshore marine installations, the stainless steel 24000 series housing is typically specified instead. Always ensure that the -34 probe option matches your installed 3300 XL Proximitor system calibration profile (8 mm probe curves) to prevent voltage-to-displacement calculation errors.\u003c\/p\u003e\n\n\u003ch4\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eA common issue during field retrofits is the failure to account for total thermal expansion of the standoff adapter. In high-temperature machinery such as steam turbines, an 8.5-inch standoff adapter (-085 option) can experience minor mechanical elongation. If the probe is gapped when the machine is completely cold, this thermal expansion can shift the probe's static DC voltage offset. Always cross-check the working gap at normal operating temperature.\u003c\/p\u003e\n\n\u003ch4\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1.5rem;\"\u003eWhen pulling the probe's coaxial cable through the conduit entry, verify that the minimum bend radius of the cable (typically 25.4 mm or 1 inch) is not violated. Ensure the internal O-ring seal within the dome is lubricated with a light coat of silicone grease before closing the housing cover. This prevents moisture ingress, which is the primary cause of signal degradation and erratic high-frequency noise spikes in proximity systems.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 15px; margin-bottom: 1.5rem;\"\u003e\n  \u003cstrong style=\"color: #9b2c2c; display: block; margin-bottom: 5px;\"\u003eCRITICAL WARNING\u003c\/strong\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0;\"\u003eIsolate and lock out the machinery before mounting or adjusting the proximity probe housing. Ensure the machine shaft is completely stationary. Failure to de-energize and lock out equipment can result in catastrophic mechanical damage, probe destruction, or severe personal injury if contact occurs with rotating assemblies.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 12px;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; line-height: 24px; text-align: center; font-weight: bold; margin-right: 12px; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eMount the standoff adapter securely to the machine casing using the specified M20 x 1.5 thread. Use high-temperature thread sealant where gas containment is required.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 12px;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; line-height: 24px; text-align: center; font-weight: bold; margin-right: 12px; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eInsert the proximity probe assembly through the housing sleeve until the tip makes light, non-destructive contact with the shaft target area.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 12px;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; line-height: 24px; text-align: center; font-weight: bold; margin-right: 12px; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eBack off the probe to the desired physical gap (typically 1.27 mm to 2.0 mm, corresponding to approximately -10 VDC on a 3300 XL Proximitor).\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; line-height: 24px; text-align: center; font-weight: bold; margin-right: 12px; flex-shrink: 0;\"\u003e4\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eLock the adjustment jam nuts, feed the coaxial cable through the flexible conduit port, and securely tighten the aluminum outer protective dome cover.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52666771800427,"sku":"21000-34-10-00-085-04-02","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/bently-nevada-21000-34-10-00-085-04-02-proximity-probe-housingassemblies-2stwjzf0nfk_be66ca2f-9968-4bdf-bdda-aff81e87770c.jpg?v=1765447308","url":"https:\/\/www.plcprotech.com\/fa\/products\/bently-nevada-21000-34-10-00-085-04-02-21000-series-proximity-probe-housing-assembly","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}