{"product_id":"eh-290-keyence-f90-series-unshielded-proximity-sensor-head","title":"EH-290 Keyence F90 Series Unshielded Proximity Sensor Head","description":"\u003ch3\u003eExecutive Summary \u0026amp; Inductive Sensing Core\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eEH-290\u003c\/strong\u003e\u003c\/span\u003e unshielded sensor head from the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eF90\u003c\/strong\u003e\u003c\/span\u003e series by \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eKeyence\u003c\/strong\u003e\u003c\/span\u003e engineers long-range ferrous metal detection for heavy automated machinery. Built with a robust cylindrical housing design, this non-shielded inductive unit expands target sensing envelopes up to 70 mm. Automation technicians deploy this high-performance component to monitor large structural components and high-speed moving metal targets reliably.\u003c\/p\u003e\n\u003ch3\u003eComprehensive Technical Parameters Matrix\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eEngineering Metric\u003c\/th\u003e\n\u003cth\u003eOperational Specification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKeyence\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel \u0026amp; Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eEH-290\u003c\/strong\u003e\u003c\/span\u003e (F90 Series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDevice Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard Non-Shielded Cylindrical Proximity Sensor Head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDetectable Objects\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFerrous metals (and nonferrous characteristics per calibration charts)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensing Ranges\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStable range 0 mm to 35 mm; Maximum detecting distance 70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrecision Metrics\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHysteresis 0.2 mm; Repeatability 0.075 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThermal Stability\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±10% max detecting distance drift across -10 °C to +60 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnvironmental Sealing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP67 enclosure rating with 3-meter integrated cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePhysical Specifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWeighs approx. 650 g (including mounting nuts and cable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAdvanced Operational Features \u0026amp; Functional Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Unshielded Range:\u003c\/strong\u003e Non-shielded coil geometry projects a wider electromagnetic field to achieve deep 70 mm maximum detection horizons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Repeatability Precision:\u003c\/strong\u003e Maintains a strict 0.075 mm repeatability threshold to ensure exact positioning triggers on repetitive machine cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarsh Environment IP67 Build:\u003c\/strong\u003e Fully sealed against cutting fluids, water jets, and heavy dust accumulation on industrial shop floors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Cabling Design:\u003c\/strong\u003e Ships pre-wired with a durable 3-meter cable harness and heavy-duty metal mounting nuts for secure installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTarget Industrial Equipment \u0026amp; Application Scenarios\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStamping \u0026amp; Press Machines:\u003c\/strong\u003e Detects large steel plate entries and confirms die seating clearances before punch cycles initiate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomotive Transfer Lines:\u003c\/strong\u003e Tracks heavy engine blocks and transmission housings moving along high-speed roller skids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy Material Handling Lifts:\u003c\/strong\u003e Monitors platform limits and pallet positioning stops on automated freight elevators.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBuilt-In Diagnostic \u0026amp; Fault Monitoring Capacities\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Drift Threshold Tracking:\u003c\/strong\u003e Designed to restrict baseline sensitivity shifts within ±10% across extreme -10 °C to +60 °C operational swings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget Size Validation:\u003c\/strong\u003e Requires standard 150 x 150 mm iron plates for baseline calibration to prevent false triggers from surrounding metal frames.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlobal Logistics \u0026amp; Warranty Assurance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFulfillment Window:\u003c\/strong\u003e Guaranteed rapid dispatch within 24 to 48 hours of order confirmation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCourier Partners:\u003c\/strong\u003e Secure international air freight routing via FedEx, UPS, and DHL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Protection:\u003c\/strong\u003e Fully covered by a comprehensive 12-month operational replacement warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlobal PLC Spare HUB's Insight \u0026amp; Field Experience\u003c\/h3\u003e\n\u003cp\u003eBecause unshielded proximity heads project magnetic fields out of their sides as well as their tips, installing them too close to surrounding steel mounting plates will cause perpetual false triggering. During a recent heavy press line overhaul, countersinking the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eEH-290\u003c\/strong\u003e\u003c\/span\u003e with proper metallic clearance zones eliminated erratic input blips entirely. Field engineers must always adhere to unshielded lateral clearance guidelines to preserve the full 35 mm stable sensing window.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhy must unshielded sensor heads like the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eEH-290\u003c\/strong\u003e\u003c\/span\u003e be installed with specific metal clearance gaps?\u003c\/strong\u003e\u003cbr\u003eUnshielded coils radiate magnetic flux laterally; mounting them flush inside surrounding iron brackets will cause the metal wall to act as a permanent target.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does targeting nonferrous metals such as aluminum alter the maximum detection distance?\u003c\/strong\u003e\u003cbr\u003eNonferrous materials reduce effective eddy current induction, which shrinks the maximum sensing threshold compared to standard iron targets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat purchasing criteria should guide my selection when upgrading from a shielded sensor model?\u003c\/strong\u003e\u003cbr\u003eVerify that your mounting bracket layout has sufficient radial clearance to accommodate the unshielded side-sensing field without triggering false alarms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow can maintenance personnel verify if thermal expansion is causing positional signal drift?\u003c\/strong\u003e\u003cbr\u003eCheck the amplifier LED indicator status while the machine is cold versus fully warmed up to ensure target engagement remains well within the 0 to 35 mm stable zone.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat precautions protect the 3-meter integrated cable during high-flex robot arm movements?\u003c\/strong\u003e\u003cbr\u003eRoute the cable through flexible drag chains and use strain-relief fittings to prevent repetitive bending stress from damaging the internal wire conductors.\u003c\/p\u003e","brand":"Keyence","offers":[{"title":"Default Title","offer_id":47534175420598,"sku":"EH-290","price":115.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/EH-290-1.jpg?v=1789895693","url":"https:\/\/www.plcsparehub.com\/products\/eh-290-keyence-f90-series-unshielded-proximity-sensor-head","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}