{"product_id":"fisher-cz21-8-quicksilver-dual-frequency-scuba-metal-detector-waterproof-upto-250-feet","title":"Fisher CZ21-8 Quicksilver Dual-Frequency Scuba Metal Detector - Waterproof Upto 250 feet","description":"\u003ch2 data-start=\"155\" data-end=\"220\"\u003e\u003cstrong data-start=\"157\" data-end=\"220\"\u003eFisher CZ-21 – Professional Submersible Metal Detector\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"222\" data-end=\"565\"\u003eThe \u003cstrong data-start=\"226\" data-end=\"247\"\u003eFisher CZ-21\u003c\/strong\u003e is a fully submersible, dual-frequency metal detector designed for professionals who require absolute reliability beneath the surface. Engineered for underwater exploration, saltwater environments, and demanding shoreline conditions, the CZ-21 offers a distinguished blend of depth, stability, and elegant simplicity.\u003c\/p\u003e\n\u003cp data-start=\"567\" data-end=\"746\"\u003eWith its proven dual-frequency design, rugged marine-grade construction, and refined audio clarity, the CZ-21 remains one of the most trusted underwater detectors available today.\u003c\/p\u003e\n\u003chr data-start=\"748\" data-end=\"751\"\u003e\n\u003ch3 data-start=\"753\" data-end=\"802\"\u003e\u003cstrong data-start=\"756\" data-end=\"802\"\u003eEngineered for the Water — Built to Endure\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"804\" data-end=\"938\"\u003ePurpose-built for real ocean conditions, the CZ-21 is rated fully submersible to \u003cstrong data-start=\"885\" data-end=\"897\"\u003e250 feet\u003c\/strong\u003e, allowing effortless transition between:\u003c\/p\u003e\n\u003cul data-start=\"940\" data-end=\"1087\"\u003e\n\u003cli data-start=\"940\" data-end=\"971\"\u003e\n\u003cp data-start=\"942\" data-end=\"971\"\u003eSaltwater surf and wet sand\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"972\" data-end=\"990\"\u003e\n\u003cp data-start=\"974\" data-end=\"990\"\u003eShallow diving\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"991\" data-end=\"1018\"\u003e\n\u003cp data-start=\"993\" data-end=\"1018\"\u003eDeep underwater hunting\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1019\" data-end=\"1050\"\u003e\n\u003cp data-start=\"1021\" data-end=\"1050\"\u003eFreshwater lakes and rivers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1051\" data-end=\"1087\"\u003e\n\u003cp data-start=\"1053\" data-end=\"1087\"\u003eRocky shorelines and tidal zones\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1089\" data-end=\"1274\"\u003eEvery detail — from its sealed control pods to its corrosion-resistant hardware — is crafted for long-term durability in environments where only the highest quality equipment will last.\u003c\/p\u003e\n\u003chr data-start=\"1276\" data-end=\"1279\"\u003e\n\u003ch3 data-start=\"1281\" data-end=\"1338\"\u003e\u003cstrong data-start=\"1284\" data-end=\"1338\"\u003eDual Frequency Intelligence for Salt \u0026amp; Fresh Water\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1340\" data-end=\"1567\"\u003eThe CZ-21 operates on \u003cstrong data-start=\"1362\" data-end=\"1414\"\u003esimultaneous dual frequencies (5 kHz and 15 kHz)\u003c\/strong\u003e, allowing it to maintain remarkable stability in saltwater while still offering excellent sensitivity to both small jewelry and deeper, heavier targets.\u003c\/p\u003e\n\u003cp data-start=\"1569\" data-end=\"1603\"\u003eThis balanced performance ensures:\u003c\/p\u003e\n\u003cul data-start=\"1605\" data-end=\"1827\"\u003e\n\u003cli data-start=\"1605\" data-end=\"1655\"\u003e\n\u003cp data-start=\"1607\" data-end=\"1655\"\u003eStrong response to gold rings and fine jewelry\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1656\" data-end=\"1714\"\u003e\n\u003cp data-start=\"1658\" data-end=\"1714\"\u003eImpressive depth on coins and high-conductivity metals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1715\" data-end=\"1771\"\u003e\n\u003cp data-start=\"1717\" data-end=\"1771\"\u003eSmooth, controlled operation in mineralized wet sand\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1772\" data-end=\"1827\"\u003e\n\u003cp data-start=\"1774\" data-end=\"1827\"\u003eAccurate target separation in underwater conditions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1829\" data-end=\"1998\"\u003eThe result is a detector that feels composed, predictable, and highly capable — even in challenging saltwater environments where single-frequency detectors often falter.\u003c\/p\u003e\n\u003chr data-start=\"2000\" data-end=\"2003\"\u003e\n\u003ch3 data-start=\"2005\" data-end=\"2045\"\u003e\u003cstrong data-start=\"2008\" data-end=\"2045\"\u003eRefined Target Audio With Tone ID\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2047\" data-end=\"2201\"\u003eThe CZ-21 uses Fisher’s renowned \u003cstrong data-start=\"2080\" data-end=\"2111\"\u003e3-tone audio identification\u003c\/strong\u003e, delivering unmistakable target tones that remain clear underwater or through headphones:\u003c\/p\u003e\n\u003cul data-start=\"2203\" data-end=\"2302\"\u003e\n\u003cli data-start=\"2203\" data-end=\"2238\"\u003e\n\u003cp data-start=\"2205\" data-end=\"2238\"\u003eHigh tone for coins and jewelry\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2239\" data-end=\"2280\"\u003e\n\u003cp data-start=\"2241\" data-end=\"2280\"\u003eMid tone for pull-tabs and gold items\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2281\" data-end=\"2302\"\u003e\n\u003cp data-start=\"2283\" data-end=\"2302\"\u003eLow tone for iron\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2304\" data-end=\"2448\"\u003eIts audio is deliberately simple, elegant, and precise — a design choice made for underwater environments where visual displays are impractical.\u003c\/p\u003e\n\u003chr data-start=\"2450\" data-end=\"2453\"\u003e\n\u003ch3 data-start=\"2455\" data-end=\"2510\"\u003e\u003cstrong data-start=\"2458\" data-end=\"2510\"\u003eRugged 8” Search Coil for Precision in the Water\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2512\" data-end=\"2579\"\u003eThis model features the \u003cstrong data-start=\"2536\" data-end=\"2562\"\u003e8-inch waterproof coil\u003c\/strong\u003e, chosen for its:\u003c\/p\u003e\n\u003cul data-start=\"2581\" data-end=\"2781\"\u003e\n\u003cli data-start=\"2581\" data-end=\"2621\"\u003e\n\u003cp data-start=\"2583\" data-end=\"2621\"\u003eSuperior maneuverability in currents\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2622\" data-end=\"2674\"\u003e\n\u003cp data-start=\"2624\" data-end=\"2674\"\u003eRefined precision in rocky and cluttered bottoms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2675\" data-end=\"2720\"\u003e\n\u003cp data-start=\"2677\" data-end=\"2720\"\u003eExcellent sensitivity to small gold items\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2721\" data-end=\"2781\"\u003e\n\u003cp data-start=\"2723\" data-end=\"2781\"\u003eStable operation near iron deposits or underwater debris\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2783\" data-end=\"2910\"\u003eThe 8” configuration is ideal for divers, surf hunters, and professionals working areas where control and handling are crucial.\u003c\/p\u003e\n\u003chr data-start=\"2912\" data-end=\"2915\"\u003e\n\u003ch3 data-start=\"2917\" data-end=\"2978\"\u003e\u003cstrong data-start=\"2920\" data-end=\"2978\"\u003eUser-Focused Simplicity, Professional-Level Capability\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2980\" data-end=\"3242\"\u003eDespite its advanced internal engineering, the CZ-21 maintains a clear, intuitive control layout designed for rapid adjustments underwater. Its large knobs, sealed interface, and ergonomic balance make it comfortable for extended hunts, whether wading or diving.\u003c\/p\u003e\n\u003chr data-start=\"3244\" data-end=\"3247\"\u003e\n\u003ch3 data-start=\"3249\" data-end=\"3297\"\u003e\u003cstrong data-start=\"3252\" data-end=\"3297\"\u003eWhy Professionals Choose the Fisher CZ-21\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"3299\" data-end=\"3354\"\u003eDiscerning water detectorists select the CZ-21 for its:\u003c\/p\u003e\n\u003cul data-start=\"3356\" data-end=\"3650\"\u003e\n\u003cli data-start=\"3356\" data-end=\"3397\"\u003e\n\u003cp data-start=\"3358\" data-end=\"3397\"\u003eProven performance in harsh saltwater\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3398\" data-end=\"3435\"\u003e\n\u003cp data-start=\"3400\" data-end=\"3435\"\u003eTrue submersible rating to 250 ft\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3436\" data-end=\"3464\"\u003e\n\u003cp data-start=\"3438\" data-end=\"3464\"\u003eDual-frequency stability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3465\" data-end=\"3495\"\u003e\n\u003cp data-start=\"3467\" data-end=\"3495\"\u003eClear and accurate tone ID\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3496\" data-end=\"3537\"\u003e\n\u003cp data-start=\"3498\" data-end=\"3537\"\u003eRugged construction for long-term use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3538\" data-end=\"3582\"\u003e\n\u003cp data-start=\"3540\" data-end=\"3582\"\u003eProfessional-level depth and sensitivity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3583\" data-end=\"3650\"\u003e\n\u003cp data-start=\"3585\" data-end=\"3650\"\u003eConfidence in Fisher’s decades of underwater detector expertise\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3652\" data-end=\"3745\"\u003eFor those who hunt beneath the waves, the CZ-21 is a benchmark of reliability and capability.\u003c\/p\u003e\n\u003chr data-start=\"3747\" data-end=\"3750\"\u003e\n\u003ch3 data-start=\"3752\" data-end=\"3774\"\u003e\u003cstrong data-start=\"3755\" data-end=\"3774\"\u003eWhat’s Included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"3776\" data-end=\"3962\"\u003e\n\u003cli data-start=\"3776\" data-end=\"3807\"\u003e\n\u003cp data-start=\"3778\" data-end=\"3807\"\u003eFisher CZ-21 metal detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3808\" data-end=\"3844\"\u003e\n\u003cp data-start=\"3810\" data-end=\"3844\"\u003e8\" fully submersible search coil\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3845\" data-end=\"3875\"\u003e\n\u003cp data-start=\"3847\" data-end=\"3875\"\u003eWaterproof control housing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3876\" data-end=\"3902\"\u003e\n\u003cp data-start=\"3878\" data-end=\"3902\"\u003eSubmersible headphones\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3903\" data-end=\"3932\"\u003e\n\u003cp data-start=\"3905\" data-end=\"3932\"\u003eShaft \u0026amp; mounting hardware\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3933\" data-end=\"3948\"\u003e\n\u003cp data-start=\"3935\" data-end=\"3948\"\u003eUser manual\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3949\" data-end=\"3962\"\u003e\n\u003cp data-start=\"3951\" data-end=\"3962\"\u003eBatteries\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3964\" data-end=\"3967\"\u003e\n\u003ch3 data-start=\"3969\" data-end=\"3994\"\u003e\u003cstrong data-start=\"3972\" data-end=\"3994\"\u003eTechnical Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"3996\" data-end=\"4394\"\u003e\n\u003cli data-start=\"3996\" data-end=\"4047\"\u003e\n\u003cp data-start=\"3998\" data-end=\"4047\"\u003e\u003cstrong data-start=\"3998\" data-end=\"4013\"\u003eTechnology:\u003c\/strong\u003e Dual-frequency (5 kHz \u0026amp; 15 kHz)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4048\" data-end=\"4100\"\u003e\n\u003cp data-start=\"4050\" data-end=\"4100\"\u003e\u003cstrong data-start=\"4050\" data-end=\"4070\"\u003eOperating Depth:\u003c\/strong\u003e Fully submersible to 250 ft\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4101\" data-end=\"4140\"\u003e\n\u003cp data-start=\"4103\" data-end=\"4140\"\u003e\u003cstrong data-start=\"4103\" data-end=\"4119\"\u003eSearch Coil:\u003c\/strong\u003e 8\" waterproof coil\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4141\" data-end=\"4172\"\u003e\n\u003cp data-start=\"4143\" data-end=\"4172\"\u003e\u003cstrong data-start=\"4143\" data-end=\"4153\"\u003eAudio:\u003c\/strong\u003e 3-tone target ID\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4173\" data-end=\"4224\"\u003e\n\u003cp data-start=\"4175\" data-end=\"4224\"\u003e\u003cstrong data-start=\"4175\" data-end=\"4184\"\u003eMode:\u003c\/strong\u003e Silent-search discriminate \u0026amp; pinpoint\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4225\" data-end=\"4255\"\u003e\n\u003cp data-start=\"4227\" data-end=\"4255\"\u003e\u003cstrong data-start=\"4227\" data-end=\"4246\"\u003eGround Balance:\u003c\/strong\u003e Manual\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4256\" data-end=\"4287\"\u003e\n\u003cp data-start=\"4258\" data-end=\"4287\"\u003e\u003cstrong data-start=\"4258\" data-end=\"4268\"\u003ePower:\u003c\/strong\u003e 4 × 9V batteries\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4288\" data-end=\"4346\"\u003e\n\u003cp data-start=\"4290\" data-end=\"4346\"\u003e\u003cstrong data-start=\"4290\" data-end=\"4301\"\u003eWeight:\u003c\/strong\u003e Approx. 6.7 lb (varies with configuration)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4347\" data-end=\"4394\"\u003e\n\u003cp data-start=\"4349\" data-end=\"4394\"\u003e\u003cstrong data-start=\"4349\" data-end=\"4362\"\u003eWarranty:\u003c\/strong\u003e 2-Year Limited Warranty\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Foresttrail","offers":[{"title":"Default Title","offer_id":54073940967761,"sku":"CZ21-8","price":1439.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/5647\/5473\/files\/Fisher_CZ-21_Quicksilver_Underwater_Scuba_Detector_-_1.webp?v=1781551136","url":"https:\/\/foresttrail.org\/products\/fisher-cz21-8-quicksilver-dual-frequency-scuba-metal-detector-waterproof-upto-250-feet","provider":"Foresttrail","version":"1.0","type":"link"}