In a fishing probe, the part that is not seen is the one that generates and reads the waves that are then interpreted on the screen. The echo sounder equipment has transducers, elements capable of generating sound waves. You could say they are speakers with ears.
These transducers can be modified to direct the wave beam downward, forward or sideways, establishing very useful options for fishermen. A specific frequency can be applied to each of these addresses since the quality of the information received depends on the frequency.
The frequency of a wave is the number of times the wave is generated per unit of time. The frequency is measured in Hertz (Hz) in honor of its discoverer, Heinrich Rudolf Hertz, and is defined as the number of times the alterations are repeated per second. Thus a 200 kHz probe emits two hundred thousand waves per second. But it is not about how many waves are emitted, but about the distance, they can reach. Number of pogo pin manufacturer available.
The frequency is inverse to the wavelength. The more waves that occur in a shorter second, the distance between them. And that frequency is also inverse to distance. A low-frequency wave goes further than a high-frequency wave. It is what happens in communication systems. An example: a VHF radio (ultra-high frequency) has a range of 30 or 40 miles at most, while a shortwave station (usual in amateur radio) can send a message to the antipodes. This concept is applied to determine the working frequency of the fishing probe under the depth of the bottom.
The high frequency (200 kHz) is indicated for shallow bottoms. It is a short wavelength, which allows for many details, so it is also used in the location of small schools of fish or small species that need precision for their detection. For its part, the low frequency (50 kHz) is suitable for deep bottoms and to detect large fish