{"product_id":"epro-pr6423-004-000-pr6423-eddy-current-proximity-sensor","title":"EPRO PR6423\/004-000 PR6423 Eddy Current Proximity Sensor","description":"\u003ch2\u003eEPRO PR6423\/004-000 Eddy Current Proximity Sensor\u003c\/h2\u003e\n\u003cp\u003eConfigured for non-contact measurement of shaft displacement and dynamic vibration in machinery protection systems, the \u003cstrong\u003eEPRO PR6423\/004-000\u003c\/strong\u003e (\u003cstrong\u003ePR6423\u003c\/strong\u003e Eddy Current Proximity Sensor) provides direct physical\/electrical execution. The hardware translates mechanical shaft motion relative to the probe tip into a proportional electrical voltage signal via high-frequency electromagnetic field variations. This physical interaction enables continuous real-time diagnostics of axial displacement, radial vibration, and eccentricity on high-speed rotating shafts.\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\u003ePR6423\/004-000\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\u003e100 g (including 1 m cable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e8 mm tip diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eSensor tip: -35 to +180 deg C; Cable: -35 to +150 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive sensor element (powered via external driver, typically -24 VDC input)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLinear Measurement Range\u003c\/td\u003e\n\u003ctd\u003e2 mm (80 mils)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003e8 V\/mm (203.2 mV\/mil) +\/- 5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDeviation from Best Fit Line\u003c\/td\u003e\n\u003ctd\u003e+\/-0.025 mm (+\/-1 mil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003eUp to 10 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTarget Material\u003c\/td\u003e\n\u003ctd\u003eFerromagnetic steel (42CrMo4 \/ AISI 4140)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Class\u003c\/td\u003e\n\u003ctd\u003eIP66 (IEC 60529)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\u003ctd\u003eSensor tip: PEEK; Case: stainless steel; Cable: PTFE; Connector: nickel-plated brass\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 sensor relies on precise eddy-current probe scaling to guarantee a constant sensitivity of 8 V\/mm against standard AISI 4140 steel targets. During system commissioning, technicians must perform gap voltage validation, adjusting the physical position of the probe to target a -10 VDC offset. This precise baseline setting accommodates expected rotor dynamics without risk of signal saturation. Additionally, the integrated coaxial termination and cable design achieve high cross-talk suppression, preventing signal interference when multiple probes are mounted in close proximity on a single turbine bearing housing.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How is the physical measurement affected if the target material is not AISI 4140 steel?\u003c\/p\u003e\n\u003cp\u003eA: The standard eddy-current probe scaling is factory-calibrated for AISI 4140 ferromagnetic steel. Non-standard alloys alter the magnetic permeability and electrical conductivity, requiring re-calibration of the driver\/transmitter unit to prevent measurement errors.\u003c\/p\u003e\n\u003cp\u003eQ: What is the structural significance of the PEEK sensor tip?\u003c\/p\u003e\n\u003cp\u003eA: The PEEK (Polyether ether ketone) tip encapsulates the internal coil, providing chemical resistance and maintaining mechanical integrity under extreme operating temperatures up to +180 deg C.\u003c\/p\u003e\n\u003cp\u003eQ: Can this sensor be connected directly to a standard DCS analog input card?\u003c\/p\u003e\n\u003cp\u003eA: No. The raw sensor output must be processed through an external driver or transmitter (such as the CON series converter) to convert the high-frequency impedance changes into a standard proportional voltage or current signal.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Alignment:\u003c\/strong\u003e Clean the shaft surface of any mechanical runout, scratches, or non-conductive coatings in the target path before mounting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGap Adjustment:\u003c\/strong\u003e Thread the probe slowly into the bracket while monitoring the driver output voltage until the target gap voltage of -10 VDC is reached.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Routing Protection:\u003c\/strong\u003e Route the PTFE-insulated cable through flexible metal conduit to prevent mechanical abrasion or damage from high-temperature environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Grounding:\u003c\/strong\u003e Connect the outer shield of the extension cable to the safety ground at the monitor cabinet end only, ensuring the sensor end remains isolated to prevent ground loops.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Emerson","offers":[{"title":"Default Title","offer_id":44364324143203,"sku":"PR6423\/004-000","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/15_542f5d0f-016e-4a1f-a768-d69f08d41883.jpg?v=1784103823","url":"https:\/\/www.autocontrolglobal.com\/products\/epro-pr6423-004-000-pr6423-eddy-current-proximity-sensor","provider":"AutoControl Global","version":"1.0","type":"link"}