Out of stock
SKU: CW35201
UPC: 873804002743
MPN: TFT-1.25BSP
The Maretron 1.25" BSM Non-Displacement Hull Focus Tube (model TFT-1.25BSP) is a precision marine transducer housing designed for installation on vessel hulls where minimal displacement and clean integration with existing systems are critical. This non-displacement design eliminates the need for large through-hull modifications, preserving hull integrity while delivering accurate acoustic performance for depth sounding and water column data.
The 1.25-inch BSM (Boat Multiplex) interface standard ensures compatibility with Maretron's ecosystem of networked marine instruments. The focus tube design concentrates the transducer's acoustic beam to reduce noise and interference from hull turbulence, delivering cleaner sonar returns in both shallow and deep water applications. The tube measures 44 inches in length with a compact 4-inch cross-section, allowing installation in tight hull spaces without sacrificing performance. Constructed from marine-grade materials, the assembly resists saltwater corrosion and maintains dimensional stability across temperature ranges typical of freshwater and coastal environments.
This transducer tube serves serious boaters, fishing vessels, and marine survey applications where reliable depth and water column visualization matter. The non-displacement housing appeals to owners of high-performance or lightweight hulls where every ounce counts, as well as to operators managing older vessels where invasive through-hull drilling poses structural risk. Installation requires proper hull preparation and integration with a compatible Maretron network display or sounder unit.
Maretron hull focus tubes are engineered for the demanding conditions of marine service. The 1.25" BSM standard represents a balance between acoustic efficiency and practical installation constraints aboard typical recreational and commercial vessels. Proper mounting orientation and clearance from engine exhaust and hull appendages ensure optimal signal return and system longevity.
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