DT800 Plastic Thu Hull Depth and Temp Transducer 

Operates at 235kHz so there is no interference with your 50/200 kHz fishfinder transducer.

Airmar's Smart™ Sensors have embedded microelectronics, meaning the signal is processed from within the transducer itself, eliminating the need for an ST70 transducer pod.

Compatible hull material: aluminum and fiberglass

Hole diameter for installation: 2"