{"product_id":"bently-nevada-991-06-70-01-cn-991-thrust-transmitter","title":"Bently Nevada 991-06-70-01-CN 991 Thrust Transmitter","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eBently Nevada 991-06-70-01-CN\u003c\/strong\u003e is a 2-wire, loop-powered \u003cstrong\u003e991 Thrust Transmitter\u003c\/strong\u003e engineered to measure axial shaft position and thrust displacement on rotating machinery. The transmitter processes raw signals from a compatible proximity probe system and conditions them into a stable 4 to 20 mA DC output directly proportional to mechanical movement. This design allows for direct integration into PLCs, DCS architectures, or SCADA systems without requiring a dedicated machinery protection monitor rack. It provides continuous, cost-effective monitoring for critical industrial assets where axial displacement tracking is required to prevent catastrophic thrust bearing failure.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLoop-powered 2-wire architecture reduces field wiring overhead and installation costs.\u003c\/li\u003e\n\u003cli\u003eStandard 4 to 20 mA DC analog output connects directly to process control systems.\u003c\/li\u003e\n\u003cli\u003eFront-panel BNC jack provides a buffered raw voltage signal for diagnostics and portable data collectors.\u003c\/li\u003e\n\u003cli\u003eNon-contacting eddy current sensing technology ensures long-term wear-free operation.\u003c\/li\u003e\n\u003cli\u003eCompact, space-saving design suitable for direct high-density DIN rail mounting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCentrifugal compressor axial thrust displacement monitoring\u003c\/li\u003e\n\u003cli\u003eSteam and gas turbine rotor position tracking\u003c\/li\u003e\n\u003cli\u003eHigh-pressure boiler feed pump shaft alignment\u003c\/li\u003e\n\u003cli\u003eIndustrial gearbox thrust bearing wear diagnostics\u003c\/li\u003e\n\u003cli\u003eForced draft and induced draft fan shaft positioning\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e991: Thrust Transmitter\u003c\/li\u003e\n\u003cli\u003e06: 3300 XL 8 mm proximity probe compatibility with 1.0 mm linear range\u003c\/li\u003e\n\u003cli\u003e70: 7.0 metres system length option\u003c\/li\u003e\n\u003cli\u003e01: 35 mm DIN rail mounting option\u003c\/li\u003e\n\u003cli\u003eCN: Approvals option certified for specialized regional or country-specific standards (China\/NEPSI\/GB)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"1\" style=\"width: 37.9061%;\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"1\" style=\"width: 61.7329%;\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"2\" style=\"width: 37.9061%;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd data-row=\"2\" style=\"width: 61.7329%;\"\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"3\" style=\"width: 37.9061%;\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd data-row=\"3\" style=\"width: 61.7329%;\"\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"4\" style=\"width: 37.9061%;\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd data-row=\"4\" style=\"width: 61.7329%;\"\u003eThrust Transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"5\" style=\"width: 37.9061%;\"\u003eOutput Signal\u003c\/td\u003e\n\u003ctd data-row=\"5\" style=\"width: 61.7329%;\"\u003e4 to 20 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"6\" style=\"width: 37.9061%;\"\u003ePower Input\u003c\/td\u003e\n\u003ctd data-row=\"6\" style=\"width: 61.7329%;\"\u003e17 to 30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"7\" style=\"width: 37.9061%;\"\u003eLinear Range\u003c\/td\u003e\n\u003ctd data-row=\"7\" style=\"width: 61.7329%;\"\u003e1.0 mm (approx. 40 mils)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"8\" style=\"width: 37.9061%;\"\u003eTransmitter Operating Temperature\u003c\/td\u003e\n\u003ctd data-row=\"8\" style=\"width: 61.7329%;\"\u003e-35 to +85 Celsius (-31 to +185 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"9\" style=\"width: 37.9061%;\"\u003eTransmitter Storage Temperature\u003c\/td\u003e\n\u003ctd data-row=\"9\" style=\"width: 61.7329%;\"\u003e-51 to +100 Celsius (-60 to +212 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"10\" style=\"width: 37.9061%;\"\u003eProbe Operating Temperature\u003c\/td\u003e\n\u003ctd data-row=\"10\" style=\"width: 61.7329%;\"\u003e-52 to +177 Celsius (-62 to +351 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"11\" style=\"width: 37.9061%;\"\u003eEnclosure Material\u003c\/td\u003e\n\u003ctd data-row=\"11\" style=\"width: 61.7329%;\"\u003eZinc-plated steel or structural polymer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"12\" style=\"width: 37.9061%;\"\u003eMounting Base\u003c\/td\u003e\n\u003ctd data-row=\"12\" style=\"width: 61.7329%;\"\u003e35 mm DIN rail mount (or bulkhead mount configuration)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"13\" style=\"width: 37.9061%;\"\u003eTransmitter Weight\u003c\/td\u003e\n\u003ctd data-row=\"13\" style=\"width: 61.7329%;\"\u003e0.43 kg (0.9 lbm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"14\" style=\"width: 37.9061%;\"\u003eTotal System Weight\u003c\/td\u003e\n\u003ctd data-row=\"14\" style=\"width: 61.7329%;\"\u003e0.82 kg (1.8 lbm) typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"15\" style=\"width: 37.9061%;\"\u003eFootprint \/ Base Dimensions\u003c\/td\u003e\n\u003ctd data-row=\"15\" style=\"width: 61.7329%;\"\u003e100.1 mm x 73.9 mm (3.94 in x 2.91 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"16\" style=\"width: 37.9061%;\"\u003eMounting Hole Pattern (Bulkhead)\u003c\/td\u003e\n\u003ctd data-row=\"16\" style=\"width: 61.7329%;\"\u003e69.9 mm x 63.5 mm (2.75 in x 2.50 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"17\" style=\"width: 37.9061%;\"\u003eHeight (Including DIN Clip)\u003c\/td\u003e\n\u003ctd data-row=\"17\" style=\"width: 61.7329%;\"\u003e53.3 mm (2.10 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"18\" style=\"width: 37.9061%;\"\u003eHeight (Body Only)\u003c\/td\u003e\n\u003ctd data-row=\"18\" style=\"width: 61.7329%;\"\u003e42.6 mm (1.68 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"19\" style=\"width: 37.9061%;\"\u003eMounting Hole Diameter\u003c\/td\u003e\n\u003ctd data-row=\"19\" style=\"width: 61.7329%;\"\u003e5.8 mm (0.23 in), 4 places\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eConnections \/ Interfaces\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"1\"\u003e\u003cstrong\u003eConnector Pin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-row=\"1\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"2\"\u003e+4-20mA \/ +VTX\u003c\/td\u003e\n\u003ctd data-row=\"2\"\u003ePositive Power Supply \/ Current Loop Input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"3\"\u003e-4-20mA \/ -VTX\u003c\/td\u003e\n\u003ctd data-row=\"3\"\u003eNegative Power Supply \/ Current Loop Return\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"4\"\u003ePROX\u003c\/td\u003e\n\u003ctd data-row=\"4\"\u003eProximity Probe Center Conductor Input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"5\"\u003eCOM\u003c\/td\u003e\n\u003ctd data-row=\"5\"\u003eCommon Reference \/ Coaxial Shield Terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"6\"\u003eSHLD\u003c\/td\u003e\n\u003ctd data-row=\"6\"\u003eInstrument Shield Ground Terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"7\"\u003eBNC Jack\u003c\/td\u003e\n\u003ctd data-row=\"7\"\u003eDynamic Voltage Signal Output (10.2 mV\/micrometer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIN Rail Attachment:\u003c\/strong\u003e Secure the housing firmly onto a standard 35 mm DIN rail using the integrated DIN mount clips inside a protective industrial enclosure rated IP54 or higher.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulkhead Mounting Option:\u003c\/strong\u003e Alternatively, use the 4 mounting holes ($5.8 \\text{ mm}$ diameter) spaced at $69.9 \\text{ mm} \\times 63.5 \\text{ mm}$ for flat panel\/bulkhead installations with the provided 6-32 x 1.326 screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding Protocol:\u003c\/strong\u003e Connect the input transducer cable shield to the SHLD terminal. The external control loop shield must be grounded at the control system (PLC\/DCS) side only to eliminate ground loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProbe Gapping:\u003c\/strong\u003e Set the physical probe gap using a digital voltmeter across the BNC jack or COM terminals to verify the sensor sits within its linear voltage range before operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparation of Wiring:\u003c\/strong\u003e Route all input sensor cables and output current loop wiring away from high-voltage AC lines or variable frequency drive cables to mitigate EMI\/RFI noise.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompliance and Certifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCN Approval Variant (Certified for regional hazardous area compliance, such as NEPSI \/ GB standards)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the exact enclosure dimensions for cabinet layout planning?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe base footprint measures 100.1 mm in length by 73.9 mm in width, with a maximum profile height of 53.3 mm when the 35 mm DIN rail clip is attached.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size are the alternative bulkhead installation holes?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit features 4 mounting holes with a diameter of 5.8 mm, laid out in a precise 69.9 mm by 63.5 mm rectangular center pattern.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the function of the BNC connector on the faceplate?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt provides an unconditioned, buffered raw voltage output for connecting diagnostic instruments and dynamic signal analyzers without disrupting the 4 to 20 mA current loop.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this device require a separate power supply line?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, it operates entirely on loop power, drawing its operating voltage directly from the 4 to 20 mA signal line.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat happens if the system length option is mismatched with the probe?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eConnecting a probe\/extension cable combination that does not match the specified 7.0-metre calibration will result in severe measurement non-linearity and scale factor errors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this transmitter be mounted in an outdoor environment?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt must be installed within a weatherproof NEMA 4X or IP65\/66 rated field junction box to protect it from moisture, dust, and direct sunlight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the transmitter output compatible with standard analog input cards?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the 4 to 20 mA output directly connects to standard differential or single-ended analog input cards on any PLC or DCS.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the meaning of the CN suffix code?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CN suffix denotes specific regional certification compliance, commonly matching China national safety and hazardous area standards.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the unit be calibrated in the field for different linear ranges?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, the linear range and scale factors are hard-wired and factory-calibrated. Range changes require a different model configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does reverse loop polarity affect the transmitter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe device features internal diode protection against reverse polarity, meaning it will not function when wired backward but will not be damaged.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":52666643317099,"sku":"991-06-70-01-CN","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/bently-nevada-991-06-70-01-cn-991-thrust-transmitter-vzobeoytryv_65189d7a-0c45-4520-9f64-15e9dd9f51fd.jpg?v=1765444581","url":"https:\/\/www.plcprotech.com\/products\/bently-nevada-991-06-70-01-cn-991-thrust-transmitter","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}