The Maretron TFT-1.25BSP is a 1.25-inch BSM Non-Displacement Hull Focus Tube, giving a sensor mounting point on a non-displacement hull tank where the sensor has to focus its reading through a specific tube geometry to work correctly. Getting that mounting hardware right matters more than it might seem, since a mismatched focus tube can throw off tank level readings even when the sensor itself is working fine.
It’s part of Maretron’s tank sensor mounting hardware line, built to pair with a compatible tank level sensor rather than functioning on its own as a standalone part.
The 1.25-inch BSM thread matches British Standard Pipe fittings, a common tank thread standard outside the US, so it’s worth confirming the boat’s tank fittings use this standard rather than NPT before ordering. Explore more marine networking.
- 1.25-inch BSM (BSP) thread
- For non-displacement hull tanks
- Part of Maretron’s tank sensor mounting hardware
- Pairs with a compatible tank level sensor
