{"product_id":"bently-nevada-21508-02-12-10-02-proximity-sensors","title":"Bently Nevada 21508-02-12-10-02 Proximity Sensors","description":"\u003cp\u003eThe \u003cstrong\u003eBently Nevada 21508-02-12-10-02\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e21508\u003c\/strong\u003e Proximity Sensors, operates as a dedicated hardware component for non-contact dynamic vibration and axial position measurement within machinery protection systems.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eOption Field\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eCode\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eConfiguration Detail\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Option\u003c\/td\u003e\n\u003ctd\u003e02\u003c\/td\u003e\n\u003ctd\u003e3\/8-24 UNF thread format\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnthreaded Length\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e1.2 in unthreaded length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Case Length\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e1.0 in case length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Cable Length\u003c\/td\u003e\n\u003ctd\u003e02\u003c\/td\u003e\n\u003ctd\u003e1.0 m (39 in) integral cable length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e21508-02-12-10-02\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.04 kg (0.09 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e8 mm probe tip diameter, 3\/8-24 UNF reverse mount body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-51 deg C to +177 deg C (-60 deg F to +351 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive transducer powered via Proximitor Sensor loop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eReverse mount 8 mm proximity probe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Type\u003c\/td\u003e\n\u003ctd\u003e1.0 m (39 in) integral cable with miniature male coaxial connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProbe Scaling\u003c\/td\u003e\n\u003ctd\u003eStandard 7.87 V\/mm (200 mV\/mil) with matching Proximitor Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eEddy-Current Probe Scaling and Gap Voltage Validation\u003c\/h3\u003e\n\u003cp\u003eThe 21508-02-12-10-02 reverse-mount probe utilizes high-frequency eddy-current probe scaling to convert target gap distances into linear electrical voltages. When driven by a matched Proximitor Sensor, the output yields a nominal scale factor of 7.87 V\/mm (200 mV\/mil) for ferromagnetic targets such as AISI 4140 steel. Setting the mechanical installation bias to achieve -10 VDC gap voltage validation establishes the sensor at the midpoint of its calibrated linear range, providing symmetric headroom for high-amplitude dynamic vibration analysis and precise rotor dynamics tracking.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How is the miniature male coaxial connector insulated from machine electrical ground?\u003c\/p\u003e\n\u003cp\u003eA: The connector terminal must be fitted with a high-dielectric silicone insulator boot to prevent grounding of the coaxial outer conductor at the machine casing.\u003c\/p\u003e\n\u003cp\u003eQ: What is the primary functional difference of the reverse-mount housing configuration?\u003c\/p\u003e\n\u003cp\u003eA: The reverse-mount body is threaded from the rear, allowing the transducer to be installed through internal bearing housings or mounting brackets where front-access clearance is limited.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eThread the reverse-mount probe body into the tapped mounting bracket or sleeve inside the bearing housing.\u003c\/li\u003e\n\u003cli\u003eAdvance the sensor tip toward the target shaft surface while measuring DC voltage across the Proximitor Sensor output terminals.\u003c\/li\u003e\n\u003cli\u003eLock the mounting jam nut once the multimeter indicates the target gap voltage of -10 VDC.\u003c\/li\u003e\n\u003cli\u003eRoute the integral 1.0 m cable away from sharp edges, hot surfaces, and high-voltage power leads.\u003c\/li\u003e\n\u003cli\u003eConnect the miniature male coaxial connector to the Proximitor extension cable and slide a protective insulating sleeve over the connector junction.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":53209237815605,"sku":"21508-02-12-10-02","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/21508-02-12-10-02.png?v=1784799891","url":"https:\/\/www.5gplc.com\/products\/bently-nevada-21508-02-12-10-02-proximity-sensors","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}