{"product_id":"bently-nevada-21000-28-05-20-050-03-02-proximity-probe-housing","title":"Bently Nevada 21000-28-05-20-050-03-02 Proximity Probe Housing","description":"\u003ch3\u003e\u003cb\u003eProduct Overview\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003eBently Nevada 21000-28-05-20-050-03-02\u003c\/span\u003e\u003c\/b\u003e provides robust, explosion-proof mechanical protection for proximity transducers. Plant engineers deploy this aluminum body housing assembly to protect critical machinery sensors in demanding industrial environments.\u003c\/p\u003e\n\u003cp\u003eThis rugged enclosure fully complies with the \u003cb\u003eAPI 670\u003c\/b\u003e standard for externally mounted probe housings. It houses a \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e3300 XL 8 mm\u003c\/span\u003e\u003c\/b\u003e reverse-mount proximity probe. The assembly seals inner components against harsh weather, dirt, and moisture. Industrial operators rely on the \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000 Series\u003c\/span\u003e\u003c\/b\u003e to ensure continuous vibration monitoring and thrust position measurement on high-speed rotating equipment.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBrand:\u003c\/b\u003e Bently Nevada\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProduct Model:\u003c\/b\u003e \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000-28-05-20-050-03-02\u003c\/span\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProduct Series:\u003c\/b\u003e \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000 Series\u003c\/span\u003e\u003c\/b\u003e Proximity Probe Housing Assemblies\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTransducer Type:\u003c\/b\u003e \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e3300 XL 8 mm\u003c\/span\u003e\u003c\/b\u003e Proximity Probe\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProbe Cable Length:\u003c\/b\u003e 0.5 meters (20 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStandoff Adapter Length:\u003c\/b\u003e 2.0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProbe Penetration Depth:\u003c\/b\u003e 5.0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFitting Option:\u003c\/b\u003e 3\/4-14 NPT plug, 3\/4 to 1\/2 NPT reducer, cable seal grip\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMounting Thread Option:\u003c\/b\u003e 3\/4-14 NPT process connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHousing Material:\u003c\/b\u003e Aluminum body with 304 stainless steel sleeve\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLinearity \u0026amp; Scale Factor:\u003c\/b\u003e 7.87 V\/mm (200 mV\/mil) nominal over standard range\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMeasurement Range:\u003c\/b\u003e 2.0 mm (80 mils) linear range with \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e3300 XL\u003c\/span\u003e\u003c\/b\u003e probe\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFrequency Response:\u003c\/b\u003e 0 Hz to 10 kHz (0 to 600,000 cpm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eResolution:\u003c\/b\u003e Sub-micron capability for micro-inch vibration changes\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTemperature Range:\u003c\/b\u003e -50°C to +80°C (-58°F to +176°F) for T4 rating\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEnvironmental Rating:\u003c\/b\u003e CSA Type 4 \/ NEMA 4 enclosure rating\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInterference Immunity:\u003c\/b\u003e Shielded cable design minimizes RFI\/EMI field noise\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAssembly Weight:\u003c\/b\u003e 1.1 kg (2.4 lb) typical without fittings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSystem Architecture \u0026amp; Mechanical Construction\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eEnclosure Housing:\u003c\/b\u003e Precision machined aluminum body offers maximum durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDome Cover:\u003c\/b\u003e Threaded dome screws securely into the main housing body.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSleeve Assembly:\u003c\/b\u003e Stainless steel 304 sleeve surrounds and shields the probe stem.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProcess Connections:\u003c\/b\u003e Standardized NPT ports facilitate rigid conduit attachment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSealing System:\u003c\/b\u003e Fluorocarbon O-rings block moisture ingress across all joints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInternal Components:\u003c\/b\u003e Holds \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e3300 XL\u003c\/span\u003e\u003c\/b\u003e reverse mount probe securely in position.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eInstallation \u0026amp; Mounting Guidelines\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eProcess Port Preparation:\u003c\/b\u003e Verify 3\/4-14 NPT machine casing threads remain clean.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThread Sealant:\u003c\/b\u003e Apply suitable pipe sealant to process mounting threads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSleeve Alignment:\u003c\/b\u003e Insertion depth matches the 5.0-inch probe penetration spec.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStandoff Mounting:\u003c\/b\u003e Secure the 2.0-inch standoff adapter directly to casing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCable Routing:\u003c\/b\u003e Pass probe cable through cable seal grip grommets carefully.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eConduit Attachment:\u003c\/b\u003e Seal conduit ports to prevent moisture migration inside housing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eCommissioning \u0026amp; Field Maintenance\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eGap Calibration:\u003c\/b\u003e Adjust probe gap using voltmeter readings before locking sleeve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVisual Verification:\u003c\/b\u003e Ensure internal coaxial connector remains clean and dry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRoutine Checks:\u003c\/b\u003e Inspect outer O-rings during regular machinery maintenance turnarounds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eField Troubleshooting:\u003c\/b\u003e Verify resistance values across the \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e3300 XL\u003c\/span\u003e\u003c\/b\u003e probe lead wire.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eSystem Compatibility \u0026amp; Integration\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000-28-05-20-050-03-02\u003c\/span\u003e\u003c\/b\u003e housing pairs seamlessly with \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003eBently Nevada 3500\u003c\/span\u003e\u003c\/b\u003e machinery monitoring systems. It interfaces with standard extension cables and \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e3300 XL\u003c\/span\u003e\u003c\/b\u003e Proximitor Sensors. It fits standard industrial machine casings conforming to API 670 guidelines.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eCompliance \u0026amp; Hazardous Area Certifications\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eAPI Compliance:\u003c\/b\u003e Fully meets API 670 standard for probe housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEnvironmental Standard:\u003c\/b\u003e RoHS Directive 2011\/65\/EU compliant.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProtection Rating:\u003c\/b\u003e CSA Certified Type 4 hazardous area enclosure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExplosion-Proof Class I:\u003c\/b\u003e Divisions 1 and 2, Groups C and D.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExplosion-Proof Class II:\u003c\/b\u003e Divisions 1 and 2, Groups E, F, and G.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExplosion-Proof Class III:\u003c\/b\u003e Approved for classified dusty environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTemperature Classification:\u003c\/b\u003e T5 at Ta = 40°C, T4 at Ta = 80°C.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eModel Selection \u0026amp; Variant Comparison\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eSelecting the correct housing configuration depends on process casing thickness and required penetration depth. Compare these configuration options when engineering your monitoring system:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eTarget Model:\u003c\/b\u003e \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000-28-05-20-050-03-02\u003c\/span\u003e\u003c\/b\u003e\n\u003cul\u003e\n\u003cli\u003eStandoff Adapter: 2.0 inches\u003c\/li\u003e\n\u003cli\u003ePenetration Depth: 5.0 inches\u003c\/li\u003e\n\u003cli\u003eFitting Option: Full cable seal grip kit with reducers\u003c\/li\u003e\n\u003cli\u003eMounting Thread: 3\/4-14 NPT process connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAlternative Variant:\u003c\/b\u003e \u003ca href=\"https:\/\/www.plcsparehub.com\/products\/21000-28-05-00-105-04-02-bently-nevada-proximity-probe-housing\"\u003e\u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000-28-05-00-105-04-02\u003c\/span\u003e\u003c\/b\u003e\u003c\/a\u003e\n\u003cul\u003e\n\u003cli\u003eStandoff Adapter: No standoff adapter (0.0 inches)\u003c\/li\u003e\n\u003cli\u003ePenetration Depth: Extended 10.5 inches reach\u003c\/li\u003e\n\u003cli\u003eFitting Option: Alternative conduit fitting configuration\u003c\/li\u003e\n\u003cli\u003eMounting Thread: 3\/4-14 NPT process connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eEngineering Selection Advice:\u003c\/b\u003e Choose the \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000-28-05-20-050-03-02\u003c\/span\u003e\u003c\/b\u003e when external clearance requires a 2.0-inch standoff. The \u003ca href=\"https:\/\/www.plcsparehub.com\/products\/21000-28-05-00-105-04-02-bently-nevada-proximity-probe-housing\"\u003e\u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000-28-05-00-105-04-02\u003c\/span\u003e\u003c\/b\u003e\u003c\/a\u003e suits deep machine casings requiring a 10.5-inch penetration without external standoff spacing.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003ePackaging \u0026amp; Order Terms\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eProduct Condition:\u003c\/b\u003e New and original in factory packing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFactory Warranty:\u003c\/b\u003e Includes 12 months comprehensive factory warranty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePackage Contents:\u003c\/b\u003e Includes housing body, dome cover, sleeve, \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e3300 XL\u003c\/span\u003e\u003c\/b\u003e probe, standoff adapter, and fitting kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGlobal Express Shipping:\u003c\/b\u003e Expedited delivery via FedEx, UPS, or DHL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDispatch Speed:\u003c\/b\u003e Ships within 24 to 48 hours following order confirmation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eIndustrial Applications \u0026amp; Fault Diagnostics\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eEngineers specify the \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000 Series\u003c\/span\u003e\u003c\/b\u003e housings across diverse heavy industrial applications:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCentrifugal Compressors:\u003c\/b\u003e Tracks shaft radial vibration and axial thrust position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSteam Turbines:\u003c\/b\u003e Measures thermal expansion and rotor dynamic behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLarge Industrial Pumps:\u003c\/b\u003e Detects bearing wear and impeller unbalance early.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eElectric Motors:\u003c\/b\u003e Monitors shaft eccentricity in critical drive trains.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe enclosed \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e3300 XL\u003c\/span\u003e\u003c\/b\u003e probe detects early mechanical faults including rotor unbalance, shaft misalignment, journal bearing wear, and oil whirl instability.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB's Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eOur field engineering team regularly sees installation errors with proximity probe housings on gas turbines and boiler feed pumps. A common mistake involves selecting incorrect penetration lengths, which damages probe tips against internal oil deflectors. The \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000-28-05-20-050-03-02\u003c\/span\u003e\u003c\/b\u003e eliminates insertion guesswork due to its precise 5.0-inch sleeve and 2.0-inch standoff combination.\u003c\/p\u003e\n\u003cp\u003eDuring a recent overhaul at a gulf refinery, maintenance crews replaced worn non-explosion-proof housings with these \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000 Series\u003c\/span\u003e\u003c\/b\u003e units. The rugged aluminum body resisted coastal atmospheric corrosion while maintaining precise probe gap calibration over 18 months of continuous operation. Always ensure installer crews torque process threads properly to maintain the CSA Type 4 seal rating.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions (FAQ)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: What probe model comes pre-installed in this housing assembly?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: This assembly includes a \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003eBently Nevada 3300 XL 8 mm\u003c\/span\u003e\u003c\/b\u003e reverse mount proximity probe with a 0.5-meter cable.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Can I install this housing in hazardous plant areas?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes, this housing holds CSA approvals for Class I, Division 1 and Division 2 hazardous locations.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: What material forms the main body of the 21000 housing?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: The \u003cb\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000 Series\u003c\/span\u003e\u003c\/b\u003e housing uses an aluminum body combined with a 304 stainless steel probe sleeve.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: How do I select the right penetration length for my machine?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Measure the distance from the outer housing boss to the shaft surface, then subtract your required standoff height.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: What field experience tip prevents signal noise in 21000 Series installations?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Always isolate the coaxial connector inside the housing dome using clear teflon tubing to avoid ground loops against the outer casing.\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":45014026158262,"sku":"21000-28-05-20-050-03-02","price":219.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/21000-28-10-20-095-04-02_5ca3ef35-4ace-47d3-a06b-247ab965ba66.jpg?v=1788761994","url":"https:\/\/www.plcsparehub.com\/products\/bently-nevada-21000-28-05-20-050-03-02-proximity-probe-housing","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}