{"product_id":"minelab-21-17","title":"Minelab and Detech 21*17 SEF coil","description":"\u003ch3 data-section-id=\"152n1qe\" data-start=\"442\" data-end=\"488\"\u003eDetech 21x17\" SEF Butterfly DD Search Coil\u003c\/h3\u003e\n\u003cp data-start=\"490\" data-end=\"777\"\u003eThe Detech 21x17\" SEF (Symmetrical Electromagnetic Field) Butterfly DD Search Coil is designed for maximum depth and superior performance in all terrains. This large elliptical coil provides exceptional ground coverage while maintaining excellent stability and accurate target detection.\u003c\/p\u003e\n\u003cp data-start=\"779\" data-end=\"985\"\u003eBuilt with patented SEF (Butterfly) technology, this coil delivers enhanced sensitivity and improved depth compared to standard DD coils, making it ideal for serious detectorists searching for deep targets.\u003c\/p\u003e\n\u003chr data-start=\"987\" data-end=\"990\"\u003e\n\u003ch3 data-section-id=\"oc6kxx\" data-start=\"992\" data-end=\"1015\"\u003eKey Specifications:\u003c\/h3\u003e\n\u003cul data-start=\"1017\" data-end=\"1254\"\u003e\n\u003cli data-section-id=\"d356b\" data-start=\"1017\" data-end=\"1045\"\u003eCoil Type: DD (Double D)\u003c\/li\u003e\n\u003cli data-section-id=\"31vz01\" data-start=\"1046\" data-end=\"1113\"\u003eTechnology: SEF (Symmetrical Electromagnetic Field) – Butterfly\u003c\/li\u003e\n\u003cli data-section-id=\"toe2la\" data-start=\"1114\" data-end=\"1151\"\u003eSize: 21 x 17 inches (elliptical)\u003c\/li\u003e\n\u003cli data-section-id=\"yghych\" data-start=\"1152\" data-end=\"1177\"\u003eWeight: approx. 907 g\u003c\/li\u003e\n\u003cli data-section-id=\"9zdg6c\" data-start=\"1178\" data-end=\"1205\"\u003eWaterproof construction\u003c\/li\u003e\n\u003cli data-section-id=\"1ohe4g\" data-start=\"1206\" data-end=\"1230\"\u003eUV protected housing\u003c\/li\u003e\n\u003cli data-section-id=\"196jbec\" data-start=\"1231\" data-end=\"1254\"\u003eCoil cover included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1256\" data-end=\"1259\"\u003e\n\u003ch3 data-section-id=\"u2ms2\" data-start=\"1261\" data-end=\"1279\"\u003eCompatibility:\u003c\/h3\u003e\n\u003cp data-start=\"1281\" data-end=\"1324\"\u003eThis Detech search coil is compatible with:\u003c\/p\u003e\n\u003cul data-start=\"1326\" data-end=\"1492\"\u003e\n\u003cli data-section-id=\"3d7quw\" data-start=\"1326\" data-end=\"1353\"\u003eMinelab Explorer series\u003c\/li\u003e\n\u003cli data-section-id=\"118mr50\" data-start=\"1354\" data-end=\"1372\"\u003eMinelab E-Trac\u003c\/li\u003e\n\u003cli data-section-id=\"hdojdy\" data-start=\"1373\" data-end=\"1391\"\u003eMinelab Safari\u003c\/li\u003e\n\u003cli data-section-id=\"r7vikw\" data-start=\"1392\" data-end=\"1411\"\u003eMinelab Quattro\u003c\/li\u003e\n\u003cli data-section-id=\"1e1d16b\" data-start=\"1412\" data-end=\"1467\"\u003eMinelab Sovereign XS \/ XS-2 \/ XS-2A \/ XS Elite \/ GT\u003c\/li\u003e\n\u003cli data-section-id=\"46m6si\" data-start=\"1468\" data-end=\"1492\"\u003eDetech Relic Striker\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1494\" data-end=\"1497\"\u003e\n\u003ch3 data-section-id=\"q4c1cr\" data-start=\"1499\" data-end=\"1512\"\u003eFeatures:\u003c\/h3\u003e\n\u003cul data-start=\"1514\" data-end=\"1976\"\u003e\n\u003cli data-section-id=\"1mvhvaw\" data-start=\"1514\" data-end=\"1566\"\u003ePatented SEF technology for improved performance\u003c\/li\u003e\n\u003cli data-section-id=\"1op7op9\" data-start=\"1567\" data-end=\"1619\"\u003eDesigned for increased depth and ground coverage\u003c\/li\u003e\n\u003cli data-section-id=\"w9cwan\" data-start=\"1620\" data-end=\"1661\"\u003eStable operation in mineralized soils\u003c\/li\u003e\n\u003cli data-section-id=\"60kysm\" data-start=\"1662\" data-end=\"1698\"\u003eHigh sensitivity to deep targets\u003c\/li\u003e\n\u003cli data-section-id=\"k7w8ws\" data-start=\"1699\" data-end=\"1749\"\u003eReinforced ribbed housing for shock absorption\u003c\/li\u003e\n\u003cli data-section-id=\"1xeov7g\" data-start=\"1750\" data-end=\"1824\"\u003eManufactured using high-quality polymer with glass fiber reinforcement\u003c\/li\u003e\n\u003cli data-section-id=\"1mb6d90\" data-start=\"1825\" data-end=\"1887\"\u003eAdvanced electromagnetic shielding for minimal signal loss\u003c\/li\u003e\n\u003cli data-section-id=\"14ndn5s\" data-start=\"1888\" data-end=\"1919\"\u003eWaterproof and UV resistant\u003c\/li\u003e\n\u003cli data-section-id=\"ztviqi\" data-start=\"1920\" data-end=\"1976\"\u003eReliable performance across a wide temperature range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1978\" data-end=\"1981\"\u003e\n\u003ch3 data-section-id=\"1570i2o\" data-start=\"1983\" data-end=\"2008\"\u003ePerformance Benefits:\u003c\/h3\u003e\n\u003cul data-start=\"2010\" data-end=\"2318\"\u003e\n\u003cli data-section-id=\"lf8cqb\" data-start=\"2010\" data-end=\"2075\"\u003eUp to 10–15% increased depth (depending on ground conditions)\u003c\/li\u003e\n\u003cli data-section-id=\"103fqut\" data-start=\"2076\" data-end=\"2103\"\u003eImproved ground balance\u003c\/li\u003e\n\u003cli data-section-id=\"faralo\" data-start=\"2104\" data-end=\"2151\"\u003eMore stable operation in difficult terrains\u003c\/li\u003e\n\u003cli data-section-id=\"9xtu7m\" data-start=\"2152\" data-end=\"2196\"\u003eEnhanced sensitivity and target response\u003c\/li\u003e\n\u003cli data-section-id=\"cvhxyo\" data-start=\"2197\" data-end=\"2236\"\u003eMore accurate target identification\u003c\/li\u003e\n\u003cli data-section-id=\"1bxiyut\" data-start=\"2237\" data-end=\"2281\"\u003eExcellent pinpointing despite large size\u003c\/li\u003e\n\u003cli data-section-id=\"1wmws6l\" data-start=\"2282\" data-end=\"2318\"\u003eBetter overall field performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2320\" data-end=\"2323\"\u003e\n\u003ch3 data-section-id=\"1wabczm\" data-start=\"2325\" data-end=\"2342\"\u003eIntended Use:\u003c\/h3\u003e\n\u003cul data-start=\"2344\" data-end=\"2493\"\u003e\n\u003cli data-section-id=\"1mdh7zk\" data-start=\"2344\" data-end=\"2365\"\u003eDeep coin hunting\u003c\/li\u003e\n\u003cli data-section-id=\"qakycr\" data-start=\"2366\" data-end=\"2396\"\u003eRelic and artifact hunting\u003c\/li\u003e\n\u003cli data-section-id=\"imn8zw\" data-start=\"2397\" data-end=\"2420\"\u003eLarge area coverage\u003c\/li\u003e\n\u003cli data-section-id=\"1lmpy49\" data-start=\"2421\" data-end=\"2445\"\u003eOpen field detecting\u003c\/li\u003e\n\u003cli data-section-id=\"1269q7b\" data-start=\"2446\" data-end=\"2493\"\u003eUse in mineralized and challenging terrains\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2495\" data-end=\"2498\"\u003e\n\u003ch3 data-section-id=\"7avop4\" data-start=\"2500\" data-end=\"2513\"\u003eWarranty:\u003c\/h3\u003e\n\u003cul data-start=\"2515\" data-end=\"2547\"\u003e\n\u003cli data-section-id=\"19nyp3v\" data-start=\"2515\" data-end=\"2547\"\u003e2-year manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2549\" data-end=\"2552\"\u003e\n\u003ch3 data-section-id=\"1whgrsd\" data-start=\"2554\" data-end=\"2579\"\u003eWhy Choose This Coil?\u003c\/h3\u003e\n\u003cp data-start=\"2581\" data-end=\"2862\"\u003eThe Detech 21x17\" SEF Butterfly coil is built for maximum depth and efficiency. It is the perfect upgrade for detectorists who want to cover large areas quickly while still achieving deep and accurate target detection. Ideal for open terrains where depth and coverage are critical.\u003c\/p\u003e","brand":"Detech","offers":[{"title":"Default Title","offer_id":54074585252180,"sku":null,"price":165.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1018\/5218\/4916\/files\/21-17-coils_c3a80f29-7644-4cfe-9cf4-17b006c6d631.webp?v=1775025706","url":"https:\/\/detnix.com\/en-at\/products\/minelab-21-17","provider":"Detnix","version":"1.0","type":"link"}