{"product_id":"21000-28-10-20-030-04-02-bently-nevada-explosion-proof-transducer","title":"21000-28-10-20-030-04-02 Bently Nevada Explosion-Proof Transducer","description":"\u003ch3\u003eBently Nevada 21000-28-10-20-030-04-02 Proximity Probe Housing Assembly Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eBently Nevada\u003c\/span\u003e \u003cspan style=\"color: #d9534f;\"\u003e21000-28-10-20-030-04-02\u003c\/span\u003e\u003c\/strong\u003e belongs to the rugged \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000 Series\u003c\/span\u003e\u003c\/strong\u003e externally mounted proximity probe housing assemblies. Fully compliant with API 670 standards, this heavy-duty aluminum body enclosure with a 304 stainless steel sleeve protects internal reverse-mount eddy current sensors against environmental hazards, physical mechanical impacts, and hazardous atmosphere exposure. The \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e21000-28-10-20-030-04-02\u003c\/span\u003e\u003c\/strong\u003e allows external adjustment and replacement of vibration transducers while maintaining process sealing and explosion-proof ratings.\u003c\/p\u003e\n\u003ch3\u003ePart Number Configuration Breakdown\u003c\/h3\u003e\n\u003cpre\u003e21000-28-10-20-030-04-02 Model Structure\n├── 21000 : Aluminum Body Proximity Probe Housing Assembly (CSA Type 4 \/ NEMA 4)\n├── -28-   : Probe Option, with Connector (3300 XL 8 mm Probe, Selectable Hazardous Area Approvals)\n├── -10-   : Probe Cable Length Option (1.0 Meter \/ 39 in)\n├── -20-   : Standoff Adapter Option (2.0 Inches)\n├── -030-  : Probe Penetration Option (3.0 Inches)\n├── -04-   : Fitting Option (One 3\/4-14 NPT Plug Only)\n└── -02    : Mounting Thread Option (3\/4-14 NPT)\n\u003c\/pre\u003e\n\u003ch3\u003eComprehensive Technical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eBently Nevada\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e21000-28-10-20-030-04-02\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e21000 Series\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing Body Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAnodized Cast Aluminum Enclosure Body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSleeve \u0026amp; Hardware Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAISI 304 Stainless Steel (SST) Sleeve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInternal Probe Installed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eReverse Mount 3300 XL 8 mm Proximity Probe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInternal Cable Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0 Meter (39 in) FEP Coaxial Cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandoff Adapter Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.0 Inches (50.8 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProbe Penetration Depth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.0 Inches (76.2 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConduit \u0026amp; Process Threads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/4-14 NPT Mounting \u0026amp; Fitting Connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFitting Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOption 04: One 3\/4-14 NPT Brass\/Steel Plug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure Ingress \u0026amp; Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCSA Type 4 Enclosure \/ API 670 Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHazardous Area Certification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExplosion-Proof Class I, Div 1 \u0026amp; 2, Groups C \u0026amp; D; Class II, Div 1 \u0026amp; 2, Groups E, F, G; Class III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Classification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT5 @ Ta = -50°C to +40°C; T4 @ Ta = -50°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAssembly Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApproximately 1.1 kg (2.4 lb) typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Characteristics \u0026amp; Advantages\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAPI 670 Standardized Construction\u003c\/strong\u003e: Meets strict petroleum and petrochemical industry requirements for external transducer mounting hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExplosion-Proof Environment Sealing\u003c\/strong\u003e: Certified CSA Type 4 enclosure design prevents gas ignition in hazardous processing locations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSleeve Depth Flexibility\u003c\/strong\u003e: Engineered with a 2-inch standoff adapter and 3-inch penetration depth to position the probe tip accurately against internal shafts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Ring Sealed Thread System\u003c\/strong\u003e: Screwed dome cover with internal synthetic O-rings isolates probe electronics from moisture, dirt, and corrosive fumes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReverse Mount Maintenance Architecture\u003c\/strong\u003e: Simplifies sensor replacement by permitting probe removal without dismantling the primary bearing housing cover.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSuitable Machinery \u0026amp; Field Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAPI 612 Steam Turbines\u003c\/strong\u003e: Houses axial position and radial shaft vibration probes on main rotor bearing caps in classified areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy Duty Gas Turbines\u003c\/strong\u003e: Protects key vibration monitoring sensors exposed to outdoor weather conditions and high ambient temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Pressure Process Compressors\u003c\/strong\u003e: Mounts on seal housings to continuously measure shaft eccentricity and thrust displacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Boiler Feed Pumps\u003c\/strong\u003e: Provides liquid-tight protection for proximity sensors operating under continuous thermal cycling and washdown conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eModel Cross-Selection Comparison \u0026amp; Technical Guidance\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter \/ Feature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModel \u003cspan style=\"color: #d9534f;\"\u003e21000-28-10-20-030-04-02\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModel \u003ca href=\"https:\/\/www.plcsparehub.com\/products\/21000-16-05-00-105-03-02-bently-nevada-proximity-probe-housing\"\u003e21000-16-05-00-105-03-02\u003c\/a\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProbe Option\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3300 XL 8 mm Reverse Mount (-28)\u003c\/td\u003e\n\u003ctd\u003e3300 5 mm \/ 8 mm Reverse Mount (-16)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInternal Cable Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0 Meter (39 in)\u003c\/td\u003e\n\u003ctd\u003e0.5 Meter (19.7 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandoff Adapter Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.0 Inches (-20)\u003c\/td\u003e\n\u003ctd\u003eNone \/ 0.0 Inches (-00)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProbe Penetration Depth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.0 Inches (-030)\u003c\/td\u003e\n\u003ctd\u003e10.5 Inches (-105)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFittings Supplied\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOne 3\/4-14 NPT Plug (-04)\u003c\/td\u003e\n\u003ctd\u003eOne 3\/4-14 NPT Conduit Fitting (-03)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Thread\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/4-14 NPT Thread (-02)\u003c\/td\u003e\n\u003ctd\u003e3\/4-14 NPT Thread (-02)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eEngineering Selection Advice:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSelect the \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e21000-28-10-20-030-04-02\u003c\/span\u003e\u003c\/strong\u003e when your machinery housing outer wall requires a 2-inch standoff clearance combined with a shallow 3.0-inch sleeve penetration for standard bearing caps using 1.0-meter internal cables.\u003c\/li\u003e\n\u003cli\u003eChoose the \u003ca href=\"https:\/\/www.plcsparehub.com\/products\/21000-16-05-00-105-03-02-bently-nevada-proximity-probe-housing\"\u003e21000-16-05-00-105-03-02\u003c\/a\u003e variant when your machine requires deep sleeve reach (10.5 inches penetration) directly flush against the housing without standoff elevation, utilizing shorter 0.5-meter internal cabling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation \u0026amp; Physical Mounting Protocols\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eApply thread seal compound or approved PTFE tape to the 3\/4-14 NPT process mounting threads before screwing the housing body into the bearing port.\u003c\/li\u003e\n\u003cli\u003eTighten the sleeve body firmly to ensure process isolation and check that internal O-rings are seated cleanly inside the main dome assembly.\u003c\/li\u003e\n\u003cli\u003eInsert the reverse-mount probe through the internal sleeve, locking it at the designated physical gap setting (typically -9 Vdc to -10 Vdc baseline) prior to securing locknuts.\u003c\/li\u003e\n\u003cli\u003eEnsure the 1.0-meter internal probe cable maintains smooth bends inside the aluminum body dome, avoiding sharp pinches against the threaded cap.\u003c\/li\u003e\n\u003cli\u003eTorque the dome cover down completely to maintain certified explosion-proof flame paths and CSA Type 4 weatherproofing seals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDiagnostic Capabilities \u0026amp; Onsite Troubleshooting\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure Seal Leak Verification\u003c\/strong\u003e: Inspect dome cover thread seals and cable entrance fittings for moisture accumulation if raw signal noise appears.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProbe Sleeve Alignment Check\u003c\/strong\u003e: Verify the internal stainless steel sleeve remains concentric with the mounting hole to prevent sleeve binding against the probe body.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExplosion-Proof Integrity Auditing\u003c\/strong\u003e: Check aluminum housing body threads and flame paths for scoring or corrosion during routinely scheduled maintenance overhauls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Grounding Verification\u003c\/strong\u003e: Verify housing body grounding continuity to machine casing ground to eliminate stray high-frequency ground loop noise.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlobal PLC Spare HUB's Insight\u003c\/h3\u003e\n\u003cp\u003eIn offshore oil platform environments, housing assemblies often suffer severe atmospheric corrosion. The \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eBently Nevada\u003c\/span\u003e \u003cspan style=\"color: #d9534f;\"\u003e21000-28-10-20-030-04-02\u003c\/span\u003e\u003c\/strong\u003e solves this challenge by combining a lightweight, anodized aluminum dome with a heavy 304 stainless steel sleeve extension. During a recent offshore turbomachinery overhaul, replacing worn legacy enclosures with the \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e21000-28-10-20-030-04-02\u003c\/span\u003e\u003c\/strong\u003e eliminated water ingress failures on exposed thrust bearing probes while maintaining full explosion-proof hazardous site compliance.\u003c\/p\u003e\n\u003ch3\u003ePackaging, Express Fulfillment \u0026amp; Warranty Terms\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition\u003c\/strong\u003e: Brand New \u0026amp; Original in Sealed Factory Packing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrder Fulfillment\u003c\/strong\u003e: Fast warehouse processing and dispatch within 24 to 48 hours.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Express Shipping\u003c\/strong\u003e: Fast international transit via FedEx, UPS, and DHL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Terms\u003c\/strong\u003e: Covered by a comprehensive 12-Month Factory Warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch3\u003eWhat is the advantage of using a standoff adapter option on the housing assembly?\u003c\/h3\u003e\n\u003cp\u003eThe standoff adapter elevates the housing main body away from hot machine casings, preventing thermal degradation of internal wiring and allowing clearance around bearing obstruction flanges.\u003c\/p\u003e\n\u003ch3\u003eHow do I troubleshoot intermittent signal drops inside the aluminum enclosure?\u003c\/h3\u003e\n\u003cp\u003eUnscrew the dome cover and check the internal ClickLoc coaxial connector to ensure it has not loosened due to continuous machine vibration.\u003c\/p\u003e\n\u003ch3\u003eCan I field-adjust the penetration depth of this probe housing assembly?\u003c\/h3\u003e\n\u003cp\u003ePenetration depth is fixed by the sleeve length option (-030 = 3.0 inches); small fine-tuning is performed by adjusting the internal reverse-mount probe locknut position.\u003c\/p\u003e\n\u003ch3\u003eWhat maintenance precautions should be taken with the dome cover threads?\u003c\/h3\u003e\n\u003cp\u003eInspect synthetic O-rings for cracking and apply a light coat of petroleum-based lubricant to body threads to prevent galling while maintaining CSA Type 4 sealing.\u003c\/p\u003e\n\u003ch3\u003eHow do I verify if the assembly meets API 670 requirements for my installation?\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #d9534f;\"\u003e21000-28-10-20-030-04-02\u003c\/span\u003e\u003c\/strong\u003e natively complies with API 670 guidelines for external transducer mounting housings when installed using approved NPT conduit seals.\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":45014027108534,"sku":"21000-28-10-20-030-04-02","price":207.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/21000-16-05-00-105-03-02_df3e92ad-40b7-43ee-83ee-b37e81d7c0d9.jpg?v=1785227692","url":"https:\/\/www.plcsparehub.com\/products\/21000-28-10-20-030-04-02-bently-nevada-explosion-proof-transducer","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}