The fish finder sensor is one of the core components of a fish finder. It is responsible for transmitting and receiving sound wave signals to detect information such as underwater fish schools and terrain.
There are several types of fish finder sensors, categorized based on detection methods, frequency, and functionality:
1.Single-frequency sensor: Emits sound waves at a single frequency and is suitable for general underwater detection needs.

2.Multi-frequency sensor: Can emit sound waves at multiple frequencies either simultaneously or alternately to adapt to different detection environments and targets. For instance, Lucky fish finders with a "D" model signify dual frequency, such as 60° at 83kHz and 20° at 200kHz. The advantage of this is that low-frequency sound waves are suitable for detecting distant fish schools and terrain, while high-frequency waves provide higher resolution for detecting nearby details.
3.Three-in-one sensor: Combines fish finding, down-scan, and side-scan capabilities, offering high-resolution, clear images of fish schools and structures over a wide area.
4.3D imaging sensor: Creates high-resolution three-dimensional views of underwater topography and fish school structures, providing more intuitive information about the underwater environment.