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Si-Tex BT70MB300-18 Bronze Low-Profile Thru-Hull CHIRP Transducer

Manufacturer

Si-Tex

<h3>About SI-TEX Marine Electronics</h3><p><strong>SI-TEX Marine Electronics</strong> has been a trusted name on the water for over 50 years, building a reputation among commercial captains, charter operators, sportfishermen, and serious recreational boaters for delivering rugged, reliable, and straightforward marine electronics. Founded in 1975 and headquartered in Riverhead, New York, SI-TEX has remained committed to a single mission throughout its history: provide mariners with the features they actually need, the durability they expect, and the value they appreciate.</p><p>What sets SI-TEX apart from larger, more corporate brands is the depth of experience behind every product. President Ted Bodtmann has been shaping marine electronics since 1967, and the leadership team collectively brings decades of hands-on industry knowledge to product design and customer support. That institutional knowledge translates directly into electronics that work the way seasoned mariners expect them to — straightforwardly, dependably, and without unnecessary complexity.</p><h3>A Full Spectrum of Marine Electronics</h3><p>SI-TEX offers one of the most complete lineups in the marine electronics segment. Their product catalog spans professional-grade <a href="/11288-si-tex-simrad-radars-autopilots-200957">radar systems and autopilots</a>, high-performance echo sounders and CHIRP sonar, precision GPS navigation and chartplotting systems, heading sensors, VHF communications, AIS transponders, and more. Whether you&apos;re outfitting a hardworking commercial vessel, a sportfishing yacht, an inshore skiff, or a long-range cruiser, there is an SI-TEX solution engineered for the task.</p><p>Their SVS Series chartplotter/sounder combos — including the SVS-880 and SVS-760 — are especially popular with commercial fishermen and smaller vessel operators, offering high-resolution color displays, powerful sonar capabilities, and intuitive operation in a compact, rugged package. The NavPro series takes things further, pairing large touchscreen MFDs with built-in Wi-Fi radar compatibility, CHIRP sonar, and Navionics or C-MAP charting integration. For vessel control, the SP-120 autopilot series supports hydraulic, mechanical, and dash-drive steering systems across a range of vessel sizes, and even offers virtual feedback to eliminate the need for a rudder sensor on some installations.</p><p>SI-TEX also offers a comprehensive range of accessories and connectivity hardware — including <a href="/11288-si-tex-diagnostic-scan-tool-cable-18035">cable adapters and interface solutions</a> — designed to keep their electronics integrated and upgradeable as technology evolves. These accessories make it easier to expand an existing SI-TEX system or transition between product generations without starting from scratch.</p><h3>Backed by a 2-Year Warranty and U.S.-Based Support</h3><p>Every SI-TEX product is backed by a <strong>2-Year Warranty</strong> and supported by an experienced service team based in Long Island, New York. For mariners who spend serious time on the water, that combination of product durability and accessible support is not a minor detail — it&apos;s a core reason professionals keep coming back to the brand. SI-TEX also distributes Koden products to the commercial marine market, extending their reach to even more demanding commercial and offshore applications.</p><p>From a single transducer cable to a fully integrated radar, chartplotter, and autopilot system, SI-TEX delivers the tools serious mariners rely on — built tough, priced fairly, and backed by people who know the sea.</p>

Part Number

BT70MB300-18
06/23/2036 4:10 PM
Sale Price

$322.12

In Stock (6)

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Product Details

The Si-Tex BT70MB300-18 is a bronze low-profile thru-hull transducer designed for medium-frequency CHIRP sonar applications. This professional-grade transducer delivers exceptional underwater imaging performance with 300W power output and operates across a broad frequency range of 95-155 kHz, providing enhanced target separation and detail in various water depths.

Key Features:

  • Medium-frequency CHIRP technology (95-155 kHz) for superior fish finding and bottom detail
  • 300W power output for reliable performance in challenging conditions
  • 18-degree tilted element design for optimal installation on deadrise hulls
  • Durable bronze construction with low-profile housing for reduced drag
  • 26-foot cable with 8-pin connector for easy integration
  • Integrated temperature sensor for accurate water temperature readings
  • Compatible with Si-Tex fishfinders and chartplotters

The tilted element design allows for proper installation on boats with significant hull deadrise angles, ensuring the transducer beam projects straight down through the water column. Bronze construction provides excellent corrosion resistance in saltwater environments while maintaining optimal signal transmission properties. Part of Si-Tex Echonautics' comprehensive line of advanced marine electronics, this transducer delivers professional-grade performance at an exceptional value.

Great prices and lighting shipping.

This was the first time I had ordered from Boatplicity, not having come across them in my previous searches for gear. As what I was looking for was a brand name product I selected purely based on price. The purchase process went seamlessly and the two items I bought showed up within a day of each other, both well within the delivery date promised. The items were well packaged and arrived undamaged, and were exactly as I had ordered and expected.

Allays fast\shipping. plus the correct parts

The part came the next day as expected and was put in my vehicle, and so far so good!!!

Quick easy and affordable love the website found what I was looking for and what I wanted

Quick delivery. Order filled accurately.

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