{"product_id":"bps-4-ultrasonic-antifouling-system-12v-4-transducer","title":"BPS Marine BPS-4 4-Transducer Ultrasonic Antifouling System 12V","description":"\u003cp class=\"nvn-hero\"\u003eThe BPS Marine BPS-4 puts four ultrasonic transducers to work keeping your hull clean without leaning on bottom paint to do all the lifting. One control module covers boats up to 50 feet, and protection reaches drives, rudders, and stabilizers too. It runs 24\/7 off your 12V system while you're tied up.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eMarine growth is relentless. Slime first, then weed, then barnacles, and before long you're losing speed and burning extra fuel just to push a dirty bottom through the water. The BPS-4 fights that at the source. It's a four transducer ultrasonic system that sends a multi-frequency sound sweep through your hull, and that constant vibration makes it hard for microorganisms to settle and take hold. Stop the slime layer from forming and you knock out the foundation that the barnacles and weed need to grab onto.\u003c\/p\u003e\n\u003cp\u003eWhat sets a system like this apart is the range it works across. The BPS-4 runs a multi-frequency sweep from 20 kHz up to 42 kHz instead of sitting on one note. Different organisms react to different frequencies, so sweeping the whole band covers more of what's trying to move in. Each transducer puts out up to 60 watts, and the control module cycles them through the sweep automatically once it's powered up. There's nothing to program day to day. You power it and it works.\u003c\/p\u003e\n\u003cp\u003eOne BPS-4 covers a hull up to 50 feet, and you're not limited to just the hull. The four transducers can be spread out to protect drives, rudders, and stabilizers too, so the running gear that's a pain to scrub gets the same treatment as the bottom. Got a bigger boat? You can add more than one system and combine them for full coverage. It's a good fit for solid fiberglass monohulls, which is what most of our cruising and sportfishing customers are running.\u003c\/p\u003e\n\u003cp\u003eThe whole thing runs off 12V DC and sips power, right around 1 amp on average with all four transducers working. That's light enough to leave running around the clock at the dock, and that's exactly how ultrasonic antifouling earns its keep. It works while you sleep. If you're on a sailboat or a boat that sits on the hook without shore power, plan for the draw. A small solar panel or a battery monitor keeps you from waking up to a flat bank. And wire it to a dedicated fuse off a clean 12V supply. Voltage drop is the enemy here, so don't tap it off a crowded accessory bus.\u003c\/p\u003e\n\u003cp\u003eInstall is straightforward for a handy owner. The transducers bond to the inside of the hull with the included epoxy kit, so nothing gets drilled through and nothing sits in the water to foul or corrode on the outside. The trick is prep. The mounting spots have to be clean, dry, solid fiberglass, and the epoxy bond needs to be void-free. Any air gap under a transducer makes a weak spot where the sound doesn't transmit well. Spread the four transducers around the boat, think bow, midships, and stern quadrants, and keep them clear of stringers, tanks, and thick structural areas that soak up the vibration. Each transducer comes with 15 feet of cable, and you get two extra 15 foot extension cables in the box for the longer runs.\u003c\/p\u003e\n\u003cp\u003eHere's the straight talk. Ultrasonic antifouling is a slime and weed fighter, and it's very good at that job. It isn't a magic force field. On high-fouling water and on hard-to-reach spots like the trailing edge of a rudder, you'll still want a coat of ablative bottom paint backing it up. Think of the BPS-4 as the thing that keeps your bottom cleaner for longer between haul-outs and cuts down the scrubbing, not as a total replacement for paint on every boat. The owners who run it that way, ultrasonic plus a good ablative, are the happiest with it.\u003c\/p\u003e\n\u003cp\u003eYou get the BPS-4 control module with an integrated power cable, four submersible transducers with 15 feet of cable each, two additional 15 foot extension cables, the epoxy mounting kit, and a printed installation and operation manual. It's a complete kit out of the box. If you've been tired of hauling out early or diving on your own hull to knock off growth, this is a set-it-and-forget-it way to stay ahead of it. And if you're not sure how many transducers your boat really needs or where to place them, give us a call. We've helped plenty of owners spec these out.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eFour ultrasonic transducers cover a hull up to 50 feet, with capacity to protect drives, rudders, and stabilizers too\u003c\/li\u003e\n  \u003cli\u003eMulti-frequency sweep from 20 kHz to 42 kHz targets a wider range of marine organisms than a single-frequency unit\u003c\/li\u003e\n  \u003cli\u003eUp to 60W of transducer output pushes ultrasonic energy through solid fiberglass hulls\u003c\/li\u003e\n  \u003cli\u003e12V DC power with roughly 1 amp average draw, light enough to run 24\/7 at the dock\u003c\/li\u003e\n  \u003cli\u003eInternal epoxy-bond mounting means no thru-hull penetrations and nothing exposed to foul or corrode outside\u003c\/li\u003e\n  \u003cli\u003e15 feet of cable per transducer plus two extra 15-foot extension cables for flexible placement\u003c\/li\u003e\n  \u003cli\u003eIntegrated power cable on the control module simplifies the 12V hookup\u003c\/li\u003e\n  \u003cli\u003eCombine multiple BPS-4 systems for hulls longer than 50 feet\u003c\/li\u003e\n  \u003cli\u003eComplete kit includes the epoxy mounting supplies and a printed install manual, ready to fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized BPS Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is ultrasonic antifouling and how does it work?\u003c\/summary\u003e\n    \u003cp\u003eIt uses high-frequency sound to keep marine growth off your hull. The BPS-4 sends an ultrasonic sweep through the hull, and that constant vibration stops the slime layer from forming. No slime, no easy foothold for weed and barnacles to build on.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat size boat does the BPS-4 protect?\u003c\/summary\u003e\n    \u003cp\u003eOne system covers a hull up to 50 feet. For a larger boat you can run more than one BPS-4 and combine them for full coverage.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow much power does it draw?\u003c\/summary\u003e\n    \u003cp\u003eIt runs on 12V DC and pulls about 1 amp on average with all four transducers active. That's light enough to leave on around the clock. If you're without shore power, plan for the draw with a solar panel or a battery monitor so you don't flatten the bank overnight.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhere do the transducers mount?\u003c\/summary\u003e\n    \u003cp\u003eOn the inside of the hull, bonded with the included epoxy kit. Nothing gets drilled through and nothing sits outside in the water. Spread the four around the boat, think bow, midships, and stern, and keep them off stringers, tanks, and heavy structure that absorbs the vibration.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it work on a cored or metal hull?\u003c\/summary\u003e\n    \u003cp\u003eIt works best on solid fiberglass monohulls, where the sound transmits cleanly through the laminate. Cored and metal hulls don't carry the ultrasonic energy as well, so results there are less predictable.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I still need bottom paint?\u003c\/summary\u003e\n    \u003cp\u003eOn most boats, yes, as a backup. Ultrasonic is excellent at fighting slime and weed, but on high-fouling water and hard spots like a rudder's trailing edge you'll want an ablative paint alongside it. The two together keep the bottom cleanest between haul-outs.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat comes in the box?\u003c\/summary\u003e\n    \u003cp\u003eThe BPS-4 control module with an integrated power cable, four submersible transducers with 15 feet of cable each, two additional 15 foot extension cables, an epoxy mounting kit, and a printed installation and operation manual.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat frequency does it run at?\u003c\/summary\u003e\n    \u003cp\u003eIt sweeps across a multi-frequency band from 20 kHz to 42 kHz rather than holding one frequency. Different organisms respond to different frequencies, so the sweep covers more of what tries to settle on the hull.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan it protect drives and rudders, not just the hull?\u003c\/summary\u003e\n    \u003cp\u003eYes. The four transducers can be placed to cover drives, rudders, and stabilizers as well as the hull, so the running gear that's hardest to scrub gets the same protection.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow hard is the install?\u003c\/summary\u003e\n    \u003cp\u003eIt's a manageable job for a handy owner. The epoxy kit is included, the transducers bond inside the hull, and there's no thru-hull work. The keys are clean, dry, solid fiberglass mounting spots, a void-free epoxy bond, and a dedicated fuse off a clean 12V supply so voltage drop doesn't rob performance.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eBPS Marine 4 Transducer 12V Ultrasonic Antifouling System\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eBPS Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eBPS 4\/12V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e709401101001\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eBPS-4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eNumber of Transducers\u003c\/th\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAverage Power Draw\u003c\/th\u003e\n\u003ctd\u003e1Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eTransducer Output\u003c\/th\u003e\n\u003ctd\u003eUp to 60W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eTransducer Cable Length\u003c\/th\u003e\n\u003ctd\u003e15 ft per transducer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIncluded Extension Cables\u003c\/th\u003e\n\u003ctd\u003e2 x 15 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOperating Frequency\u003c\/th\u003e\n\u003ctd\u003e20 kHz to 42 kHz multi-frequency sweep\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum Hull Length\u003c\/th\u003e\n\u003ctd\u003eUp to 50 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProtected Surfaces\u003c\/th\u003e\n\u003ctd\u003eHulls, drives, rudders, stabilizers\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is ultrasonic antifouling and how does it work?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It uses high-frequency sound to keep marine growth off your hull. The BPS-4 sends an ultrasonic sweep through the hull, and that constant vibration stops the slime layer from forming. No slime, no easy foothold for weed and barnacles to build on.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What size boat does the BPS-4 protect?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"One system covers a hull up to 50 feet. For a larger boat you can run more than one BPS-4 and combine them for full coverage.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How much power does it draw?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It runs on 12V DC and pulls about 1 amp on average with all four transducers active. That's light enough to leave on around the clock. If you're without shore power, plan for the draw with a solar panel or a battery monitor so you don't flatten the bank overnight.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Where do the transducers mount?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"On the inside of the hull, bonded with the included epoxy kit. Nothing gets drilled through and nothing sits outside in the water. Spread the four around the boat, think bow, midships, and stern, and keep them off stringers, tanks, and heavy structure that absorbs the vibration.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it work on a cored or metal hull?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It works best on solid fiberglass monohulls, where the sound transmits cleanly through the laminate. Cored and metal hulls don't carry the ultrasonic energy as well, so results there are less predictable.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Do I still need bottom paint?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"On most boats, yes, as a backup. Ultrasonic is excellent at fighting slime and weed, but on high-fouling water and hard spots like a rudder's trailing edge you'll want an ablative paint alongside it. The two together keep the bottom cleanest between haul-outs.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What comes in the box?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The BPS-4 control module with an integrated power cable, four submersible transducers with 15 feet of cable each, two additional 15 foot extension cables, an epoxy mounting kit, and a printed installation and operation manual.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What frequency does it run at?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It sweeps across a multi-frequency band from 20 kHz to 42 kHz rather than holding one frequency. Different organisms respond to different frequencies, so the sweep covers more of what tries to settle on the hull.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can it protect drives and rudders, not just the hull?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The four transducers can be placed to cover drives, rudders, and stabilizers as well as the hull, so the running gear that's hardest to scrub gets the same protection.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How hard is the install?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a manageable job for a handy owner. The epoxy kit is included, the transducers bond inside the hull, and there's no thru-hull work. The keys are clean, dry, solid fiberglass mounting spots, a void-free epoxy bond, and a dedicated fuse off a clean 12V supply so voltage drop doesn't rob performance.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"BPS Marine","offers":[{"title":"Default Title","offer_id":44785768300637,"sku":"1004545","price":1899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/BPS412V_001.jpg?v=1784934119","url":"https:\/\/nvnmarine.com\/products\/bps-4-ultrasonic-antifouling-system-12v-4-transducer","provider":"NVN Marine","version":"1.0","type":"link"}