{"product_id":"bently-nevada-991-25-50-02-05-991-thrust-transmitter","title":"Bently Nevada 991-25-50-02-05 991 Transmetteur de poussée","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e991 Thrust Transmitter\u003c\/strong\u003e converts axial shaft displacement signals into a proportional 4 to 20 mA output for machinery control and protection systems. The unit is designed for centrifugal air compressors, pumps, motors, and fans requiring continuous thrust position monitoring through a simple loop-powered interface.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBently Nevada 991-25-50-02-05\u003c\/strong\u003e is a 2-wire loop-powered transmitter compatible with the 3300 NSv proximity probe system using a 5 m extension cable configuration. The transmitter conditions the probe signal into engineering units proportional to shaft axial position and transmits the signal directly to PLC, DCS, or machinery protection systems.\u003c\/p\u003e\n\u003cp\u003eThe transmitter integrates the Proximitor sensor internally and does not require an external signal conditioning module. Diagnostic access is available through non-isolated PROX OUT and COM terminals together with a coaxial connector for vibration and gap voltage monitoring.\u003c\/p\u003e\n\u003cp\u003eThe unit supports bulkhead mounting and includes non-interacting zero and span adjustments for loop calibration. A dedicated test input pin allows verification of loop output using a variable DC voltage source.\u003c\/p\u003e\n\u003cp\u003eThe potted housing design supports installation in high-humidity industrial environments. The transmitter is commonly used in OEM rotating machinery packages where compact thrust monitoring is required.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2-wire loop-powered transmitter\u003c\/li\u003e\n\u003cli\u003e4 to 20 mA proportional thrust output\u003c\/li\u003e\n\u003cli\u003eCompatible with 3300 NSv proximity probes\u003c\/li\u003e\n\u003cli\u003eIntegrated Proximitor sensor design\u003c\/li\u003e\n\u003cli\u003eDynamic vibration and gap voltage output\u003c\/li\u003e\n\u003cli\u003eBulkhead mounting configuration\u003c\/li\u003e\n\u003cli\u003eNon-interacting zero and span adjustments\u003c\/li\u003e\n\u003cli\u003ePower-up inhibit circuit\u003c\/li\u003e\n\u003cli\u003eNOT OK signal defeat protection\u003c\/li\u003e\n\u003cli\u003eSupports diagnostic signal access\u003c\/li\u003e\n\u003cli\u003ePotted construction for humid environments\u003c\/li\u003e\n\u003cli\u003eSuitable for compressors, pumps, motors, and fans\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCentrifugal air compressors\u003c\/li\u003e\n\u003cli\u003eIndustrial pumps\u003c\/li\u003e\n\u003cli\u003eElectric motors\u003c\/li\u003e\n\u003cli\u003eRotating machinery packages\u003c\/li\u003e\n\u003cli\u003eOEM skid systems\u003c\/li\u003e\n\u003cli\u003eTurbomachinery thrust monitoring\u003c\/li\u003e\n\u003cli\u003eMachinery protection systems\u003c\/li\u003e\n\u003cli\u003ePLC and DCS monitoring interfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCode\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e991\u003c\/td\u003e\n\u003ctd\u003eThrust Transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e+\/-25 mils full-scale range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e5.0 m system length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e02\u003c\/td\u003e\n\u003ctd\u003eBulkhead mounting screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e05\u003c\/td\u003e\n\u003ctd\u003eAgency approval option\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCategory\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eThrust Transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e991-25-50-02-05\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003e991\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003e3300 NSv proximity probe and extension cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Length\u003c\/td\u003e\n\u003ctd\u003e5.0 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Output\u003c\/td\u003e\n\u003ctd\u003e4 to 20 mAdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e12 to 35 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoop Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-1.5% full scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Loop Resistance\u003c\/td\u003e\n\u003ctd\u003e1000 Ohm at 35 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003eDC to 10 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Limiting\u003c\/td\u003e\n\u003ctd\u003e23 mA typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;100 us fault response\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-35 degC to +85 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-51 degC to +100 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e100% condensing, non-submerged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitter Weight\u003c\/td\u003e\n\u003ctd\u003e0.43 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal System Weight\u003c\/td\u003e\n\u003ctd\u003e0.82 kg typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e100 x 74 x 53.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Method\u003c\/td\u003e\n\u003ctd\u003eBulkhead mounting screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProbe Cable Type\u003c\/td\u003e\n\u003ctd\u003e75 Ohm coaxial FEP insulated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransducer Case Material\u003c\/td\u003e\n\u003ctd\u003eAISI 303 or 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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eConnections\/Interfaces\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eConnector Pin\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eE1-E2\u003c\/td\u003e\n\u003ctd\u003ePower supply and 4-20 mA output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eE3-E4\u003c\/td\u003e\n\u003ctd\u003eProximitor connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJ2\u003c\/td\u003e\n\u003ctd\u003ePROX OUT diagnostic connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJ3\u003c\/td\u003e\n\u003ctd\u003eProbe connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePROX OUT\u003c\/td\u003e\n\u003ctd\u003eDynamic vibration signal output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOM\u003c\/td\u003e\n\u003ctd\u003eCommon diagnostic terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the transmitter in a dry control enclosure or protected machinery panel area. Maintain proper shielding and grounding practices for all probe and signal cables to reduce EMI and RFI interference.\u003c\/p\u003e\n\u003cp\u003eRoute proximity probe cables separately from high-voltage power wiring. Avoid excessive bending or mechanical stress on coaxial cables during installation.\u003c\/p\u003e\n\u003cp\u003eVerify probe gap adjustment according to the machinery shaft position requirements before commissioning. Incorrect probe positioning may prevent full-scale measurement operation.\u003c\/p\u003e\n\u003cp\u003eUse isolated diagnostic equipment when accessing the PROX OUT signal. The diagnostic output is non-isolated from the 4 to 20 mA loop.\u003c\/p\u003e\n\u003cp\u003eProvide sufficient ventilation around the transmitter when installed in enclosed cabinets with elevated ambient temperatures.\u003c\/p\u003e\n\u003ch3\u003eCompliance and Certifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eStandard\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFCC Part 15\u003c\/td\u003e\n\u003ctd\u003eEMC compliance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEN 61000-6-2\u003c\/td\u003e\n\u003ctd\u003eEMC immunity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEN 61000-6-4\u003c\/td\u003e\n\u003ctd\u003eEMC emissions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEMC Directive 2014\/30\/EU\u003c\/td\u003e\n\u003ctd\u003eEuropean EMC compliance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eATEX Directive 2014\/34\/EU\u003c\/td\u003e\n\u003ctd\u003eHazardous area approval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoHS Directive 2011\/65\/EU\u003c\/td\u003e\n\u003ctd\u003eRoHS compliance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eABS 2009 Steel Vessels Rules\u003c\/td\u003e\n\u003ctd\u003eMaritime approval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCSA\/NRTL\/C Class I Div 2\u003c\/td\u003e\n\u003ctd\u003eHazardous location approval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eATEX\/IECEx Ex ia IIC T4 Ga\u003c\/td\u003e\n\u003ctd\u003eIntrinsically safe approval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the 991 transmitter measure?\u003c\/strong\u003e\u003cbr\u003eIt measures axial shaft displacement and converts the signal into a proportional 4 to 20 mA output.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich probe system is compatible with this transmitter?\u003c\/strong\u003e\u003cbr\u003eThe unit is designed for use with the 3300 NSv proximity probe system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the transmitter loop powered?\u003c\/strong\u003e\u003cbr\u003eYes. It operates as a 2-wire loop-powered device.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the transmitter provide vibration diagnostics?\u003c\/strong\u003e\u003cbr\u003eYes. The PROX OUT connection provides dynamic vibration and gap voltage signals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mounting method does this version use?\u003c\/strong\u003e\u003cbr\u003eThis model uses bulkhead mounting screws.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the transmitter require an external Proximitor module?\u003c\/strong\u003e\u003cbr\u003eNo. The Proximitor sensor is integrated into the transmitter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the output signal type?\u003c\/strong\u003e\u003cbr\u003eThe standard output is 4 to 20 mAdc.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the transmitter connect directly to a PLC or DCS?\u003c\/strong\u003e\u003cbr\u003eYes. The output is suitable for standard industrial control system analog inputs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the supported operating temperature range?\u003c\/strong\u003e\u003cbr\u003eThe operating range is -35 degC to +85 degC.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the housing suitable for humid environments?\u003c\/strong\u003e\u003cbr\u003eYes. The potted construction supports high-humidity environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat happens during a probe fault condition?\u003c\/strong\u003e\u003cbr\u003eThe NOT OK circuit drives the output below 3.6 mA during a fault condition.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the loop output be tested without machinery movement?\u003c\/strong\u003e\u003cbr\u003eYes. A test input pin supports loop verification using a variable DC source.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the transmitter support hazardous area installations?\u003c\/strong\u003e\u003cbr\u003eYes. The unit includes CSA and ATEX\/IECEx approvals depending on configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat industries commonly use this transmitter?\u003c\/strong\u003e\u003cbr\u003eIt is widely used in compressor, pump, motor, and rotating equipment monitoring systems.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52666539508075,"sku":"991-25-50-02-05","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/bently-nevada-991-25-50-02-05-sensor-proximity-0t0frsy3a1c_f409c99a-d085-41f0-8c60-aad1f927cbb1.jpg?v=1765440452","url":"https:\/\/www.plcprotech.com\/fr\/products\/bently-nevada-991-25-50-02-05-991-thrust-transmitter","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}