{"product_id":"bently-nevada-3500-70m-136449-09-recip-velocity-monitor","title":"Bently Nevada 3500\/70M 136449-09 Recip Velocity Monitor","description":"\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eBently Nevada 3500\/70M (P\/N 136449-09)\u003c\/strong\u003e is a dedicated reciprocating compressor monitoring module engineered for the 3500 Machinery Protection System. This 4-channel monitor acquires vibration data from seismic transducers and converts the signals into machinery condition parameters used for protection, diagnostics, and process monitoring.\u003c\/p\u003e\n\u003cp\u003eDesigned for compressor applications, the module continuously evaluates vibration conditions against configurable Alert and Danger thresholds to support early fault detection and machine shutdown protection. It supports multiple monitoring modes for crankcase, frame, and crosshead vibration analysis in reciprocating machinery environments.\u003c\/p\u003e\n\u003cp\u003eThe module integrates signal conditioning, alarm processing, buffered outputs, and recorder outputs within a single rack-based protection platform. Channel pairs can be configured independently for different measurement strategies depending on compressor operating requirements.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFour-channel reciprocating compressor vibration monitor\u003c\/li\u003e\n\u003cli\u003eCompatible with Bently Nevada 3500 protection racks\u003c\/li\u003e\n\u003cli\u003eSupports seismic acceleration and velocity transducers\u003c\/li\u003e\n\u003cli\u003eContinuous machinery protection with configurable alarm logic\u003c\/li\u003e\n\u003cli\u003eBuffered outputs for external analysis equipment\u003c\/li\u003e\n\u003cli\u003eRecorder outputs for DCS and PLC integration\u003c\/li\u003e\n\u003cli\u003eFront-panel diagnostic LED indicators\u003c\/li\u003e\n\u003cli\u003eDesigned for high-reliability industrial compressor systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eMonitoring Functions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eEach channel pair can simultaneously perform one or two monitoring functions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImpulse Acceleration\u003c\/li\u003e\n\u003cli\u003eAcceleration 2\u003c\/li\u003e\n\u003cli\u003eReciprocating Velocity\u003c\/li\u003e\n\u003cli\u003eLow-Frequency Reciprocating Velocity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"1\"\u003eParameterSpecification\u003c\/td\u003e\n\u003ctd data-row=\"1\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"2\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd data-row=\"2\"\u003eRecip Impulse Velocity Monitor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"3\"\u003eModel\u003c\/td\u003e\n\u003ctd data-row=\"3\"\u003e\u003cstrong\u003e3500\/70M\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"4\"\u003ePart Number\u003c\/td\u003e\n\u003ctd data-row=\"4\"\u003e\u003cstrong\u003e136449-09\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"5\"\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd data-row=\"5\"\u003eBently Nevada 3500 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"6\"\u003eInput Channels\u003c\/td\u003e\n\u003ctd data-row=\"6\"\u003e4 seismic transducer inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"7\"\u003ePower Consumption\u003c\/td\u003e\n\u003ctd data-row=\"7\"\u003e7.7 W nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"8\"\u003eAcceleration Input Impedance\u003c\/td\u003e\n\u003ctd data-row=\"8\"\u003e10 kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"9\"\u003eVelocity Input Impedance\u003c\/td\u003e\n\u003ctd data-row=\"9\"\u003e1 MΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"10\"\u003eSpecial Inhibit Input\u003c\/td\u003e\n\u003ctd data-row=\"10\"\u003eContact closure, 5 VDC @ 390 μA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"11\"\u003eRecorder Output Range\u003c\/td\u003e\n\u003ctd data-row=\"11\"\u003e+4 to +20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"12\"\u003eRecorder Load Resistance\u003c\/td\u003e\n\u003ctd data-row=\"12\"\u003e600 Ω maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"13\"\u003eRecorder Update Rate\u003c\/td\u003e\n\u003ctd data-row=\"13\"\u003eLess than 100 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"14\"\u003eRecorder Resolution\u003c\/td\u003e\n\u003ctd data-row=\"14\"\u003e0.3662 μA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"15\"\u003eRecorder Accuracy\u003c\/td\u003e\n\u003ctd data-row=\"15\"\u003e±0.05 mA typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"16\"\u003eBuffered Output\u003c\/td\u003e\n\u003ctd data-row=\"16\"\u003eOne coaxial connector per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"17\"\u003eBuffered Output Impedance\u003c\/td\u003e\n\u003ctd data-row=\"17\"\u003e550 Ω typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"18\"\u003eTransducer Supply Voltage\u003c\/td\u003e\n\u003ctd data-row=\"18\"\u003e–22 VDC minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"19\"\u003eTransducer Supply Current\u003c\/td\u003e\n\u003ctd data-row=\"19\"\u003e40 mA maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"20\"\u003eShort Circuit Protection\u003c\/td\u003e\n\u003ctd data-row=\"20\"\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"21\"\u003eCommunication Indicators\u003c\/td\u003e\n\u003ctd data-row=\"21\"\u003eOK, TX\/RX, Bypass LEDs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eSensitivity Ranges\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"1\"\u003eMeasurement TypeSensitivity\u003c\/td\u003e\n\u003ctd data-row=\"1\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"2\"\u003eImpulse Acceleration\u003c\/td\u003e\n\u003ctd data-row=\"2\"\u003e0.51–11.72 mV\/(m\/s²)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"3\"\u003eAcceleration 2\u003c\/td\u003e\n\u003ctd data-row=\"3\"\u003e0.51–11.72 mV\/(m\/s²)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"4\"\u003eRecip Velocity\u003c\/td\u003e\n\u003ctd data-row=\"4\"\u003e3.54–22.64 mV\/(mm\/s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"5\"\u003eLow-Frequency Recip Velocity\u003c\/td\u003e\n\u003ctd data-row=\"5\"\u003e3.54–22.64 mV\/(mm\/s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003ePhysical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"1\"\u003eItemValue\u003c\/td\u003e\n\u003ctd data-row=\"1\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"2\"\u003eDimensions\u003c\/td\u003e\n\u003ctd data-row=\"2\"\u003e2.6 cm × 25.6 cm × 24.4 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"3\"\u003eWeight\u003c\/td\u003e\n\u003ctd data-row=\"3\"\u003e0.85 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"4\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd data-row=\"4\"\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-row=\"5\"\u003eMounting Style\u003c\/td\u003e\n\u003ctd data-row=\"5\"\u003e3500 Rack Installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eApplication Areas\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eBently Nevada 3500\/70M 136449-09\u003c\/strong\u003e module is commonly installed in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReciprocating compressors\u003c\/li\u003e\n\u003cli\u003ePetrochemical processing units\u003c\/li\u003e\n\u003cli\u003eNatural gas compression stations\u003c\/li\u003e\n\u003cli\u003eRefinery rotating equipment systems\u003c\/li\u003e\n\u003cli\u003eHeavy industrial vibration protection systems\u003c\/li\u003e\n\u003cli\u003eCompressor skid monitoring applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eOperational Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eSome third-party industrial listings reference additional values such as 220 V operating voltage, 50 kHz frequency response, stainless steel construction, and extended temperature ranges. These specifications are not standard published parameters for the rack module itself and should be validated against official Bently Nevada documentation before project implementation.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat machinery is the 3500\/70M designed for?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe module is optimized for reciprocating compressors and associated vibration monitoring applications within the Bently Nevada 3500 protection platform.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCan the module provide analog outputs to external systems?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eYes. The unit includes proportional 4–20 mA recorder outputs for connection to PLC, DCS, or plant monitoring systems.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDoes the module support real-time machinery protection?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eYes. The monitor continuously compares vibration measurements against configured alarm setpoints and can initiate protection responses through the 3500 system.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":44129216004184,"sku":"3500\/70M 136449-09","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/350070M136449-092.jpg?v=1779438166","url":"https:\/\/www.industriaxplc.com\/products\/bently-nevada-3500-70m-136449-09-recip-velocity-monitor","provider":"IndustriaX Limited","version":"1.0","type":"link"}