{"product_id":"991-25-70-01-05-bently-nevada-990-991-series-thrust-transmitter","title":"991-25-70-01-05 Bently Nevada 990\/991 Series Thrust Transmitter","description":"\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBently Nevada 991-25-70-01-05\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e991\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThrust Transmitter, operates as a dedicated hardware component for non-contacting axial shaft displacement monitoring within machinery protection networks. The module interfaces with an 8 mm eddy-current proximity probe to linearize raw proximity signals and output a standardized 4-20 mA current loop signal directly to an external control loop or data acquisition interface.\u003c\/p\u003e\n\u003ch3\u003eSuffix Nomenclature breakdown\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e991\u003c\/strong\u003e: Base model for 2-wire axial thrust transmitter.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-25\u003c\/strong\u003e: Full-scale range option designating 25-0-25 mils (50 mils total linear range).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-70\u003c\/strong\u003e: System length option designating 7.0 m (23.0 ft) system length, panel mount.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-01\u003c\/strong\u003e: Mounting option designating standard 35 mm DIN-rail or screw panel installation tabs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-05\u003c\/strong\u003e: Agency approval option specifying multi-agency hazardous area approvals (ATEX, IECEx, CSA).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e991-25-70-01-05\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBently Nevada\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOrigin\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUSA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSignal Output\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4-20 mA DC loop-powered analog signal\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProbe Interface\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCalibrated for 3300 XL 8 mm proximity probe\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eLinear Range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.27 mm (50 mils) nominal total span\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSystem Total Length\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e7.0 m matched network\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSupply Voltage Requirements\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e+12 VDC to +35 VDC loop potential at terminals\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-40 deg C to +80 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Consumption\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.84 W maximum current loop load capacity\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.28 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eShipping Dimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e150 mm x 120 mm x 75 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEddy-Current Probe Scaling and Rotor Dynamics Tracking\u003c\/h3\u003e\n\u003cp\u003eThe internal transmitter micro-circuit acts as an integrated driver to regulate the RF field emitted by the 8 mm tip, establishing a standardized eddy-current probe scaling factor. Real-time calibration verification requires verifying a gap voltage validation target (-10 VDC targets) across the raw coaxial test points prior to standard loop lock-down. This reference mapping tracks structural shifts and rapid thermal expansion anomalies impacting rotor dynamics, while internal filtering circuits ensure cross-talk suppression when multiple 991 modules share adjacent backplane DIN-rail rails.\u003c\/p\u003e\n\u003ch3\u003eProcurement Package Assembly\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eOne (1) Bently Nevada 991-25-70-01-05 thrust transmitter module\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOne (1) Integrated ground isolation installation spacer block\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTwin (2) Coaxial connector terminal safety dust shielding boots\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFactory specification documentation logging targeted linearity plots\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eMount the transmitter housing block onto a grounded 35 mm DIN-rail layout or bolt directly to a control plate surface inside an IP54 rated terminal enclosure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConnect the calibrated 3300 XL 8 mm proximity probe coaxial connector link to the transmitter input jack using a ClickLoc connection matrix.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAttach a digital multimeter across the local BNC raw signal test ports to verify the sensor maintains the specific -10 VDC gap validation voltage baseline.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWire the 4-20 mA loop lines with twisted, shielded pair cable arrays, running the primary structural shields to a single grounding pin on the DCS chassis card.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIsolate power input wires from heavy high-voltage motor switchgear bundles to minimize electromagnetic hum or noise distortion on the signal loop.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLogistics Parameters \u0026amp; Shipping Specification\u003c\/h3\u003e\n\u003cp\u003eDelivery time: 3-5 days when payment finish through regional express flight drop routing handled by DHL, FEDEX, or UPS. Inner hardware items are sealed inside heavy-walled moisture-vapor protection anti-static industrial packaging matrices. The outer transit cartons are lined with high-density impact-absorbent poly foam structures to prevent physical shock impacts or tracking shift during multi-stage container transit.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can this 7.0 m transmitter model (-70) be deployed with a 9.0 m proximity probe system length configuration?\u003c\/p\u003e\n\u003cp\u003eA: No. The internal integration networks inside this specific transmitter model are calibrated for a total 7.0 m electrical length. Coupling a 9.0 m probe or a mismatched cable length disrupts the eddy-current probe scaling, inducing measurement drift and non-linearities across the 4-20 mA output span.\u003c\/p\u003e\n\u003cp\u003eQ: Can this loop-powered module be hot-swapped while the active DCS or PLC tracking loop is energized?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The device supports hot-swap steps on the current loop circuit. Technicians can detach or land terminal block lines without risking damage to internal components or causing cross-talk corruption on adjacent channels.\u003c\/p\u003e\n\u003cp\u003eQ: What output behavior occurs if the field coaxial cable line experiences a clean break or open circuit condition?\u003c\/p\u003e\n\u003cp\u003eA: An open circuit or severed probe line drops the transmitter's loop output current below 3.6 mA. This sub-low current level signals a hardware fault condition to the monitoring system, disabling false trip execution loops.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":45518825291949,"sku":"991-25-70-01-05","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/bently-nevada-991-25-70-01-05-thrust-transmitter-iul15xjmpqu.jpg?v=1766979657","url":"https:\/\/www.maxwellplc.com\/products\/991-25-70-01-05-bently-nevada-990-991-series-thrust-transmitter","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}