{"product_id":"vibration-transmitter-bently-nevada-990-04-70-02-00","title":"Vibration Transmitter | Bently Nevada 990-04-70-02-00","description":"\u003ch2\u003eBently Nevada 990-04-70-02-00 Vibration Transmitter\u003c\/h2\u003e\n\u003cp\u003eConfigured for continuous vibration monitoring and signal conditioning in Turbine Supervisory Instrumentation (TSI) applications, the \u003cstrong\u003eBently Nevada 990-04-70-02-00\u003c\/strong\u003e (\u003cstrong\u003e990\u003c\/strong\u003e Vibration Transmitter) provides direct physical\/electrical execution by processing eddy-current proximity probe inputs into analog current loop outputs. The hardware functions as a standalone, loop-powered device that transforms dynamic displacement data into a linear 4-20 mA signal proportional to overall shaft vibration, interfaces directly with programmable logic controllers (PLCs) or distributed control systems (DCSs), and operates without requiring a separate monitor rack.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe specific alphanumeric configuration of the \u003cstrong\u003e990-04-70-02-00\u003c\/strong\u003e defines its calibrated scale, physical system length compatibility, and mounting hardware as itemized below:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e04\u003c\/strong\u003e: Full-scale option designated for 0-4 mils pp (0-100 μm pp) linear displacement range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e70\u003c\/strong\u003e: Calibrated system length configured for 7.0 meters (23.0 feet) total proximity probe and extension cable matching.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e02\u003c\/strong\u003e: Bulkhead mounting option utilizing dedicated integrated screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e00\u003c\/strong\u003e: Agency approval option indicating no hazardous area certifications are required for this specific assembly.\u003c\/li\u003e\n\u003c\/ul\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\u003e990-04-70-02-00\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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.44 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e10 x 7.3 x 6 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Performance Indicator\u003c\/td\u003e\n\u003ctd\u003e0-4 mils pp (0-100 μm pp) full-scale displacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Length Option\u003c\/td\u003e\n\u003ctd\u003e7.0 meters (23.0 feet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eBulkhead screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eLoop-powered, 4-20 mA interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAgency Approval\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\u003eEddy-Current Probe Scaling and Gap Voltage Validation\u003c\/h3\u003e\n\u003cp\u003eThe transmitter circuitry is precisely engineered for eddy-current probe scaling to match standard 3300 XL 5 mm and 8 mm proximity transducer networks. During commissioning and baseline calibration validation, the direct-current (DC) voltage across the coaxial probe terminal measures the proximity sensor gap voltage. A target gap voltage baseline of -10 VDC corresponds to the center of the linear range, ensuring optimal rotor dynamic measurements and cross-talk suppression. Incorrect system length matching or probe mismatch shifts this voltage, compromising the 4-20 mA loop scaling accuracy.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Can the 990-04-70-02-00 operate with a 5.0-meter probe and extension cable system?\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e No. This model is hardware-calibrated specifically for a 7.0-meter system length. Interfacing it with 5.0-meter proximity components induces significant impedance mismatch, shifting the gap voltage baseline and rendering the linear voltage-to-current conversion inaccurate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Does this device support hot-swap replacement under power?\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e Yes, because the transmitter operates as a loop-powered current device. Disconnecting or reconnecting the 4-20 mA circuit does not damage the internal circuitry, provided the external power supply does not exceed the maximum rated voltage specifications of the loop loop terminal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Mounting:\u003c\/strong\u003e Secure the housing onto a rigid flat surface using the integrated bulkhead screws to mitigate localized housing vibrations that could couple into the internal electronic components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding and Grounding:\u003c\/strong\u003e Terminate the outer shield of the proximity probe extension cable cleanly at the transmitter terminal block. Ensure that field wiring shields follow a single-point grounding philosophy—typically grounded at the control system end—to prevent ground loops from injecting electrical noise into the vibration readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConduit and Wiring:\u003c\/strong\u003e Run all proximity probe cables and analog output wiring in dedicated, grounded metal conduits. Separate these low-voltage signal lines from heavy AC power distribution routing to prevent inductive cross-talk.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":44273142399064,"sku":"990-04-70-02-00","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/990-04-70-02-00-3.jpg?v=1782285943","url":"https:\/\/www.industriaxplc.com\/ar\/products\/vibration-transmitter-bently-nevada-990-04-70-02-00","provider":"IndustriaX Limited","version":"1.0","type":"link"}