{"product_id":"bently-nevada-991-25-70-01-cn-991-thrust-transmitter","title":"Bently Nevada 991-25-70-01-CN 991 Thrust Transmitter","description":"\u003cp\u003eThe \u003cstrong\u003eBently Nevada 991-25-70-01-CN\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e991\u003c\/strong\u003e Thrust Transmitter, operates as a dedicated hardware component for axial position signal conditioning within rotating machinery protection loops.\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 Code\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eOption Description\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eTechnical Definition\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e991\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBase Model\u003c\/td\u003e\n\u003ctd\u003eThrust Transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e-25\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFull-scale Option\u003c\/td\u003e\n\u003ctd\u003e25-0-25 mils (+\/-25 mils) full-scale axial displacement range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e-70\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem Length Option\u003c\/td\u003e\n\u003ctd\u003e7.0 metres (23.0 feet) calibrated total system length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e-01\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMounting Option\u003c\/td\u003e\n\u003ctd\u003e35 mm DIN-rail clips installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e-CN\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAgency Approval Option\u003c\/td\u003e\n\u003ctd\u003eNot required\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\u003e991-25-70-01-CN\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eThrust Transmitters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Type\u003c\/td\u003e\n\u003ctd\u003eAxial shaft displacement (thrust position)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-Scale Range\u003c\/td\u003e\n\u003ctd\u003e25-0-25 mils (+\/-25 mils)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Cable Length\u003c\/td\u003e\n\u003ctd\u003e7.0 metres (23.0 feet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eProportional 4-20 mA loop current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Interface\u003c\/td\u003e\n\u003ctd\u003e35 mm DIN-rail clips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAgency Approvals\u003c\/td\u003e\n\u003ctd\u003eNot required (-CN option)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eLoop-powered via output 4-20 mA current interface\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 \u0026amp; Gap Voltage Validation (-10 VDC Targets)\u003c\/h3\u003e\n\u003cp\u003eThe 991 transmitter accepts non-contacting eddy-current proximity sensor inputs over a factory-tuned 7.0-metre total system length. System commissioning mandates physical gap voltage validation across test terminals to verify the static baseline bias target of -10 VDC when the machine shaft resides at mechanical mid-span. Internal eddy-current probe scaling processes transducer impedance changes into a proportional 4-20 mA current output across the calibrated 25-0-25 mils physical span.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How is primary loop power provided to the 991-25-70-01-CN module terminals?\u003c\/p\u003e\n\u003cp\u003eA: Operating power is drawn directly from the 2-wire 4-20 mA output current loop circuit connected to the host automation system.\u003c\/p\u003e\n\u003cp\u003eQ: Can extension cable lengths be modified in the field without affecting scaling accuracy?\u003c\/p\u003e\n\u003cp\u003eA: No, the 7.0-metre system length is factory-calibrated to specific probe inductance and line capacitance; altering cable lengths compromises output scaling.\u003c\/p\u003e\n\u003cp\u003eQ: What physical mounting mechanism is included with the -01 option?\u003c\/p\u003e\n\u003cp\u003eA: The -01 mounting option includes factory-fitted mounting clips for direct installation onto standard 35 mm DIN rails.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eSnap the module securely onto an industrial 35 mm DIN rail inside a protective field panel.\u003c\/li\u003e\n\u003cli\u003eFasten the 7.0-metre proximity probe extension cable coaxial connector to the transmitter input jack, securing it hand-tight.\u003c\/li\u003e\n\u003cli\u003eValidate static DC gap voltage using a multimeter across raw signal terminals, adjusting probe depth to achieve the -10 VDC target at mechanical center.\u003c\/li\u003e\n\u003cli\u003eRoute 2-wire shielded twisted-pair conductors from the output terminals to the host control panel current loop input.\u003c\/li\u003e\n\u003cli\u003eTerminate the cable drain shield at a single earthing point on the main cabinet bus bar to mitigate ground noise and cross-talk interference.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":43825069916250,"sku":"991-25-70-01-CN","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/990-05-70-01-011_76276e23-dae5-48bf-b229-6eca188e0d87.png?v=1786437916","url":"https:\/\/www.spareoil.com\/products\/bently-nevada-991-25-70-01-cn-991-thrust-transmitter","provider":"SpareOil Automation","version":"1.0","type":"link"}