{"product_id":"21000-28-05-20-035-04-02-bently-nevada-compliant-assembly","title":"21000-28-05-20-035-04-02 Bently Nevada Compliant Assembly","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003eBently Nevada 21000-28-05-20-035-04-02\u003c\/strong\u003e is a robust, explosion-proof Proximity Probe Housing Assembly designed to shield critical dynamic vibration sensors. Constructed with a heavy-duty aluminum body and an integrated 304 stainless steel sleeve, this assembly is fully compliant with the American Petroleum Institute's \u003cstrong\u003eAPI 670 Standard\u003c\/strong\u003e for externally mounted probe housings. It contains a reverse-mount 3300 XL 8mm proximity probe, allowing maintenance teams to easily access, gap, or replace sensors from outside the machine casing without requiring an expensive machinery shutdown.\u003c\/p\u003e\n\n\u003ch2\u003eCore Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAPI 670 Compliant Architecture:\u003c\/strong\u003e Specifically configured to meet stringent petrochemical and power generation criteria for external sensor mounting and safety boundaries.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExplosion-Proof Aluminum Body:\u003c\/strong\u003e High-strength, lightweight aluminum casting equipped with a screw-in dome cover and robust O-ring path sealing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNorth American Hazardous Certifications:\u003c\/strong\u003e Certified by the Canadian Standards Association (CSA) for Class I Div 1 \u0026amp; 2 (Groups C, D) and Class II (Groups E, F, G) hazardous locations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeatherproof Environmental Armor:\u003c\/strong\u003e Earns a certified CSA Type 4 rating, providing excellent protection against driving rain, industrial dust, and localized corrosive elements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #f2f2f2;\"\u003e\n      \u003cth style=\"border: 1px solid #dddddd; text-align: left; padding: 6px;\"\u003eParameter\u003c\/th\u003e\n      \u003cth style=\"border: 1px solid #dddddd; text-align: left; padding: 6px;\"\u003eData\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e\u003cstrong\u003eComplete Assembly Part Number\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e21000-28-05-20-035-04-02 (21000 Series Profile)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e\u003cstrong\u003eInternal Probe Option (Option 28)\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e3300 XL 8 mm probe with selectable hazardous area approvals\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e\u003cstrong\u003eProbe Cable Length (Option 05)\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e0.5 meter (20 inches) short tail lead\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e\u003cstrong\u003eStandoff Adapter Length (Option 20)\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e2.0 inches (51 mm) extended standoff layout\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e\u003cstrong\u003eProbe Penetration Depth (Option 035)\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e3.5 inches total internal process sleeve insertion length\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e\u003cstrong\u003eFittings Configuration (Option 04)\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003eOne 3\/4-14 NPT explosion-proof sealing plug only\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e\u003cstrong\u003eMounting Base Thread (Option 02)\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e3\/4-14 NPT process line thread profile\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e\u003cstrong\u003eModule Net Weight\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e1.10 kg (2.40 lbs) typical baseline weight (without extra fittings)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e\u003cstrong\u003eHazardous Temperature Codes\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\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 style=\"border: 1px solid #dddddd; padding: 6px;\"\u003e\u003cstrong\u003eEnvironmental Standards\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 6px;\"\u003eRoHS Directive 2011\/65\/EU \/ CSA Type 4 Enclosure\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eEngineering \u0026amp; Installation Guide\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMechanical Interface \u0026amp; Weight Limits:\u003c\/strong\u003e Weighing a typical \u003cstrong\u003e1.10 kg (2.40 lbs)\u003c\/strong\u003e, the 21000 assembly utilizes a lightweight yet robust aluminum housing body. Because it integrates a 2.0-inch standoff adapter, the mandatory 3\/4-14 NPT mounting thread option must be systematically inspected for straight alignment. Screw into the machine casing wall tap and compress the thread seal securely to keep a gas-tight fluid barrier.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLoop Extension Matching Limits:\u003c\/strong\u003e Take note of the physical cable limits. Since this variation features a short 0.5-meter internal probe cable option, the internal sensor connectors will not be visible outside the sleeve body. The maximum combined length allowance of the standoff and penetration tube is capped at 13.5 inches (34.3 mm) to ensure the 0.5m lead can comfortably bridge out without strain.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConduit Sealing and Plugging:\u003c\/strong\u003e The Option 04 configuration comes with a single 3\/4-14 NPT metal plug. For explosion-proof installations, ensure the open conduit port is completely sealed using an approved cable gland or conduit sealing compound to prevent explosive gases from tracking down the instrumentation loop lines.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntrinsically Safe Grounding:\u003c\/strong\u003e For intrinsically safe loops inside hazardous processing zones, verify the installation matches Bently Nevada reference drawing 140979. Ensure proper earth bonding is maintained between the aluminum body shell and the structural machinery frame to negate stray static charges.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical FAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: What does compliance with the API 670 standard mean for this proximity probe housing assembly?\u003c\/strong\u003e\u003cbr\u003e\nA1: API 670 is the American Petroleum Institute’s defining standard for machinery protection systems. Compliance guarantees that the housing meets strict global dimensions, structural strength limits, environmental sealing barriers, and external mounting requirements necessary to safely house vibration sensors on critical oil and gas refinery equipment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ2: Why does the 21000 housing require a 2-inch standoff adapter combined with a 3.5-inch penetration depth?\u003c\/strong\u003e\u003cbr\u003e\nA2: The 2.0-inch standoff adapter elevates the main aluminum terminal junction box away from the hot exterior skin of the machine casing. The 3.5-inch penetration depth sleeve then extends down through the insulation and machine wall, positioning the internal 3300 XL 8mm probe tip at the exact proximity gap required to sense shaft movement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ3: What is the benefit of the reverse-mount probe configuration contained within this 21000 assembly?\u003c\/strong\u003e\u003cbr\u003e\nA3: In a standard forward-mount setup, replacing a probe requires unbolting heavy machine covers. The reverse-mount configuration lets you unthread the dome cover and withdraw the probe out through the back of the 304 stainless steel sleeve from outside the machine, cutting asset downtime down to a minimum during routine instrument swaps.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":51050855661700,"sku":"21000-28-05-20-035-04-02","price":154.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/7454\/7844\/files\/21000-28-05-20-035-04-02-1.jpg?v=1781097372","url":"https:\/\/www.etowonauto.com\/products\/21000-28-05-20-035-04-02-bently-nevada-compliant-assembly","provider":"Etowon Auto","version":"1.0","type":"link"}