{"product_id":"bently-nevada-991-25-70-01-01-991-thrust-transmitter-module","title":"Bently Nevada 991-25-70-01-01 991 Thrust Transmitter Module","description":"\u003cp\u003eThe \u003cstrong\u003eBently Nevada 991-25-70-01-01\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e991\u003c\/strong\u003e Thrust Transmitter Module, operates as a dedicated hardware component for axial shaft displacement 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 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 Module\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 Range Option\u003c\/td\u003e\n\u003ctd\u003e+\/-25 mils (25-0-25 mils) 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 Cable Length Option\u003c\/td\u003e\n\u003ctd\u003e7.0 m (23.0 ft) total system length calibration\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-01\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAgency Approval Option\u003c\/td\u003e\n\u003ctd\u003eCSA Division 2 approval rating\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\u003e991-25-70-01-01\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\u003eTransmitter Type\u003c\/td\u003e\n\u003ctd\u003e2-wire loop-powered thrust transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-Scale Range\u003c\/td\u003e\n\u003ctd\u003e+\/-25 mils (25-0-25 mils) axial displacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Cable Length\u003c\/td\u003e\n\u003ctd\u003e7.0 m (23.0 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eProportional loop-powered transmitter signal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eLoop-powered via output current loop\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\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eAISI 303\/304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransducer Tip Material\u003c\/td\u003e\n\u003ctd\u003ePolyphenylene sulfide (PPS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Type\u003c\/td\u003e\n\u003ctd\u003e75 ohm coaxial, FEP insulated (Optional AISI 302 stainless steel armor with FEP jacket)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAgency Approval\u003c\/td\u003e\n\u003ctd\u003eCSA Division 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-35 to +85 deg C (-31 to +185 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-51 to +100 deg C (-60 to +212 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.95 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 991 module enclosure profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eGap Voltage Validation (-10 VDC Targets) \u0026amp; Rotor Dynamics\u003c\/h3\u003e\n\u003cp\u003eThe module translates proximity transducer output into a 2-wire current loop signal proportional to rotor position along the axial plane. Correct loop calibration requires physical gap voltage validation across raw signal test terminals, establishing a nominal -10 VDC baseline bias when the machine shaft rests at the mechanical center of its thrust bearing clearance. This setup maintains accurate signal processing of dynamic rotor position variations caused by mechanical thrust load changes.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What power interface drives the transmitter output signal?\u003c\/p\u003e\n\u003cp\u003eA: Operating power is drawn directly from the 2-wire loop current interface connected to the control system or monitoring panel.\u003c\/p\u003e\n\u003cp\u003eQ: What construction materials are used for the transmitter sensor head and housing?\u003c\/p\u003e\n\u003cp\u003eA: The main housing uses AISI 303\/304 stainless steel, while the transducer tip is constructed from high-durability Polyphenylene sulfide (PPS).\u003c\/p\u003e\n\u003cp\u003eQ: Does the extension cable specify particular electrical impedance and jacketing?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the transmitter system utilizes a 75 ohm FEP-insulated coaxial cable, with options for an AISI 302 stainless steel armor sleeve with an outer FEP jacket.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the module securely onto a standard 35 mm DIN rail inside an enclosure, confirming clip lock retention.\u003c\/li\u003e\n\u003cli\u003eInterconnect the 75 ohm FEP coaxial cable assembly between the probe interface and the transmitter input terminal, ensuring tight coaxial seating.\u003c\/li\u003e\n\u003cli\u003eVerify the static DC bias using a calibrated multimeter across raw signal terminals, adjusting physical probe standoff to hit the -10 VDC target.\u003c\/li\u003e\n\u003cli\u003eWire the 2-wire output terminals to the receiving analog input card using shielded twisted-pair cabling.\u003c\/li\u003e\n\u003cli\u003eTerminate the field cable drain wire at a single point to the enclosure instrument earthing bus bar to eliminate noise coupling.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":43825060053082,"sku":"991-25-70-01-01","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/991-05-70-01-01_190b2b1d-4555-453b-ad70-e310be74f519.png?v=1786437466","url":"https:\/\/www.spareoil.com\/products\/bently-nevada-991-25-70-01-01-991-thrust-transmitter-module","provider":"SpareOil Automation","version":"1.0","type":"link"}