{"product_id":"keyence-cu-21a-inductive-proximity-sensor","title":"Keyence CU-21A Inductive Proximity Sensor","description":"\u003cdiv style=\"max-width:100%;margin:0 auto;font-family:Arial,Helvetica,sans-serif;color:#1a1a1a;font-size:15px;line-height:1.6;overflow-wrap:anywhere;\"\u003e\n\u003ch1 style=\"font-size:22px;line-height:1.3;margin:0 0 12px;color:#1a1a1a;\"\u003eCU-21A Inductive Proximity Sensor | Keyence\u003c\/h1\u003e\n\u003cp style=\"margin:0 0 12px;line-height:1.6;\"\u003eThe \u003cstrong\u003eKeyence CU-21A\u003c\/strong\u003e is an inductive proximity sensor. It is supplied by SHLY-PLC, an independent industrial-automation distributor: every unit is visually inspected and functionally checked before dispatch, held in ready stock and shipped worldwide for maintenance, spares and retrofit use. Share your application or existing part number and our team will confirm fitment and comparable in-stock alternatives.\u003c\/p\u003e\n\u003ch2 style=\"font-size:18px;line-height:1.3;margin:22px 0 10px;padding:0 0 6px;border-bottom:2px solid #005096;color:#1a1a1a;\"\u003eFeatures\u003c\/h2\u003e\n\u003cul style=\"margin:6px 0 14px 20px;padding:0;\"\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eEnvironmental resistance Ambient temperature:\u003c\/strong\u003e -10 to +50 °C 14 to 122 °F (No freezing).\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approx. 105 g.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e CU-21A.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Standard.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eExternal calibration input signal Connection sensor:\u003c\/strong\u003e NPN open-collector output type or type with output with contacts (signal input and synchronization input).\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eInput No. of inputs:\u003c\/strong\u003e 2.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"font-size:18px;line-height:1.3;margin:22px 0 10px;padding:0 0 6px;border-bottom:2px solid #005096;color:#1a1a1a;\"\u003eSpecifications\u003c\/h2\u003e\n\u003cp style=\"font-size:13px;color:#666666;margin:0 0 4px;\"\u003eTechnical parameters compiled from the manufacturer data sheet and reference documentation.\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;margin:6px 0 18px;font-size:14px;\"\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#005096;color:#ffffff;padding:7px 11px;text-align:left;vertical-align:top;word-break:break-word;font-weight:700;\"\u003eTechnical Specifications\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eef1f4;color:#1a1a1a;padding:6px 11px;font-weight:700;text-align:left;vertical-align:top;word-break:break-word;border-bottom:1px solid #e6e8eb;\"\u003eType Designation\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eCU-21A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eef1f4;color:#1a1a1a;padding:6px 11px;font-weight:700;text-align:left;vertical-align:top;word-break:break-word;border-bottom:1px solid #e6e8eb;\"\u003ePower Supply\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eRating Power voltage\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e100 to 240 VAC ±10 %, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003ePower consumption\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e7 VA max.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eef1f4;color:#1a1a1a;padding:6px 11px;font-weight:700;text-align:left;vertical-align:top;word-break:break-word;border-bottom:1px solid #e6e8eb;\"\u003eInputs \u0026amp; Outputs\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eExternal calibration input signal Connection sensor\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eNPN open-collector output type or type with output with contacts (signal input and synchronization input)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eInput No. of inputs\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eMinimum input time\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e5 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eInput system\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eTransistor (via NPN output device), contact (via limit switch\/microswitch, etc.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eControl output\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eRelay output: 1c, 250 VAC, 2 A (resistive load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eTransistor\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e―\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eDC output\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e12 VDC ±10%, 200 mA max.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eef1f4;color:#1a1a1a;padding:6px 11px;font-weight:700;text-align:left;vertical-align:top;word-break:break-word;border-bottom:1px solid #e6e8eb;\"\u003eMechanical\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eApprox. 105 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eef1f4;color:#1a1a1a;padding:6px 11px;font-weight:700;text-align:left;vertical-align:top;word-break:break-word;border-bottom:1px solid #e6e8eb;\"\u003eEnvironmental\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eEnvironmental resistance Ambient temperature\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e-10 to +50 °C 14 to 122 °F (No freezing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eRelative humidity\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e35 to 85 % RH (No condensation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eef1f4;color:#1a1a1a;padding:6px 11px;font-weight:700;text-align:left;vertical-align:top;word-break:break-word;border-bottom:1px solid #e6e8eb;\"\u003eOther\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eTimer\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e―\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eFunctions\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eAND logic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eOperation mode\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eStandard, synchronous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"font-size:15px;line-height:1.4;margin:14px 0 3px;color:#1a1a1a;\"\u003eCompatibility \u0026amp; Cross-References\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;line-height:1.6;\"\u003eModel variants, options and firmware revisions can affect fitment. Before ordering the Keyence CU-21A inductive proximity sensor, share your existing part number or project requirements and our team will cross-reference comparable in-stock Keyence units and verify compatibility. This listing is provided by an independent industrial-automation distributor; brand names and part numbers are used for identification only.\u003c\/p\u003e\n\u003ch2 style=\"font-size:18px;line-height:1.3;margin:22px 0 10px;padding:0 0 6px;border-bottom:2px solid #005096;color:#1a1a1a;\"\u003eApplications\u003c\/h2\u003e\n\u003cul style=\"margin:6px 0 14px 20px;padding:0;\"\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003ePresence, position and distance detection on automated production and packaging lines.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003eObject verification, counting and positioning in material-handling applications.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003eMachine and process monitoring with reliable, repeatable sensing in industrial environments.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003eReplacement sensors for existing detection and measurement installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"font-size:18px;line-height:1.3;margin:22px 0 10px;padding:0 0 6px;border-bottom:2px solid #005096;color:#1a1a1a;\"\u003eWarranty\u003c\/h2\u003e\n\u003cul style=\"margin:6px 0 14px 20px;padding:0;\"\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e CU-21A is stocked for prompt shipment; contact us for current quantity and lead time.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eInspection \u0026amp; testing:\u003c\/strong\u003e each unit is visually inspected and functionally checked before packing.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eDelivery:\u003c\/strong\u003e in-stock orders placed before 14:00 ship the same business day; standard worldwide delivery is about 5-8 business days, express shipping is available, and orders over $500 ship free.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eWarranty \u0026amp; returns:\u003c\/strong\u003e covered by our supplier warranty and standard returns policy; contact our team for full terms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"font-size:13px;line-height:1.5;color:#555555;background:#f7f7f8;border-left:3px solid #005096;padding:9px 12px;margin:12px 0;\"\u003eIndependent supplier: Keyence part CU-21A is supplied by SHLY-PLC, an independent industrial-automation distributor. Brand names and part numbers are used for product identification and remain the property of their respective owners; this listing is not affiliated with, sponsored or endorsed by the manufacturer.\u003c\/div\u003e\n\u003ch2 style=\"font-size:18px;line-height:1.3;margin:22px 0 10px;padding:0 0 6px;border-bottom:2px solid #005096;color:#1a1a1a;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3 style=\"font-size:15px;line-height:1.4;margin:14px 0 3px;color:#1a1a1a;\"\u003eQ: What condition is the CU-21A supplied in?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;line-height:1.6;\"\u003eA: Each CU-21A is inspected and functionally checked before sale. Contact us for the current stock condition and quantity.\u003c\/p\u003e\n\u003ch3 style=\"font-size:15px;line-height:1.4;margin:14px 0 3px;color:#1a1a1a;\"\u003eQ: How quickly can the CU-21A ship?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;line-height:1.6;\"\u003eA: In-stock orders placed before 14:00 ship the same business day. Standard worldwide delivery is about 5-8 business days, express shipping is available and orders over $500 ship free.\u003c\/p\u003e\n\u003ch3 style=\"font-size:15px;line-height:1.4;margin:14px 0 3px;color:#1a1a1a;\"\u003eQ: Can you confirm compatibility or a replacement for the CU-21A?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;line-height:1.6;\"\u003eA: Yes. Share your existing part number or application and our technical team will verify compatibility and provide cross-references to comparable in-stock models.\u003c\/p\u003e\n\u003cp style=\"font-size:12px;color:#888888;text-align:center;margin:18px 0 4px;\"\u003eCU-21A · Technical reference data · Independently supplied by SHLY-PLC\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Keyence","offers":[{"title":"Default Title","offer_id":71130790658301,"sku":"CU-21A","price":1137.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0747\/5665\/3309\/files\/AS_125_L.jpg?v=1787241995","url":"https:\/\/shly-plc.com\/products\/keyence-cu-21a-inductive-proximity-sensor","provider":"SHLY-PLC","version":"1.0","type":"link"}