{"product_id":"epro-pr9268-203-000-electrodynamic-velocity-sensor","title":"EPRO PR9268\/203-000 Electrodynamic Velocity Sensor","description":"\u003cp\u003eThe \u003cstrong\u003eEPRO PR9268\/203-000\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003ePR9268\u003c\/strong\u003e Electrodynamic Velocity Sensor, operates as a dedicated hardware component for measuring casing vibration velocity within turbomachinery protection systems. Utilizing a seismic spring-suspended coil moving through a permanent magnetic field, the transducer converts surface mechanical vibration directly into a proportional AC voltage output across a 4 to 1000 Hz operating bandwidth.\u003c\/p\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\u003ePR9268\/203-000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eEPRO \/ Emerson\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.75 kg (1.65 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eEstimated Shipping Size: 25 x 22 x 8 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to 100 deg C (-40 to 212 deg F) baseline\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive self-generating electrodynamic coil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003e28.5 mV\/mm\/s (723.9 mV\/in\/s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e4 to 1000 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNatural Frequency\u003c\/td\u003e\n\u003ctd\u003e4.5 Hz +\/- 0.75 Hz at 20 deg C (68 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration Amplitude\u003c\/td\u003e\n\u003ctd\u003e3000 um (4000 um) peak-peak\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplitude Linearity\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoil Resistance\u003c\/td\u003e\n\u003ctd\u003e1875 ohm +\/- 10%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHarmonized Tariff Code\u003c\/td\u003e\n\u003ctd\u003e8537101190\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eRotor Dynamics and Signal Transmission\u003c\/h3\u003e\n\u003cp\u003eThe EPRO PR9268\/203-000 features a low natural frequency of 4.5 Hz (+\/- 0.75 Hz), enabling precise rotor dynamics evaluation and low-speed machinery monitoring down to 4 Hz. Internal mechanical dampening maintains an amplitude linearity error below 2% across dynamic vibration amplitudes up to 3000 um peak-peak. Symmetrical coil geometry provides internal cross-talk suppression against surrounding magnetic fields, preserving raw AC voltage signal fidelity before transmission to receiving monitoring modules.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the PR9268\/203-000 velocity sensor require an external DC power supply to operate?\u003c\/p\u003e\n\u003cp\u003eA: No, the sensor uses a passive electrodynamic moving-coil design that generates its own proportional AC output voltage directly from mechanical motion.\u003c\/p\u003e\n\u003cp\u003eQ: Why is the low natural frequency of 4.5 Hz important for machinery monitoring?\u003c\/p\u003e\n\u003cp\u003eA: A 4.5 Hz natural frequency allows the seismic coil mass to remain stationary relative to housing vibration at operational speeds above 4 Hz, enabling accurate absolute casing vibration velocity measurements.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eInspect the machine casing mounting pad to ensure the surface is flat, smooth, and clear of paint, debris, or metal burrs.\u003c\/li\u003e\n\u003cli\u003eThread the transducer tightly onto the mounting stud, torqueing to standard engineering limits to establish solid mechanical contact without distorting the internal coil guide.\u003c\/li\u003e\n\u003cli\u003eRoute field wiring through grounded protective metal conduit, maintaining spatial isolation from high-voltage AC power cables and variable frequency drives (VFDs).\u003c\/li\u003e\n\u003cli\u003eConnect the signal leads to the monitoring rack input channels, ensuring the twisted-pair cable shield connects to Earth ground at the cabinet busbar only.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Emerson Epro","offers":[{"title":"Default Title","offer_id":45474367701107,"sku":"PR9268\/203-000","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/PR9268301-100_c28db8da-be10-4c64-b057-866202f0c93f.png?v=1789109671","url":"https:\/\/www.dcssupplier.com\/ar\/products\/epro-pr9268-203-000-electrodynamic-velocity-sensor","provider":"DcsSupplier Limited","version":"1.0","type":"link"}