ECT D052S dual-frequency

200 kHz sound impulses will reflect from the top surface of the bottom, but 50 kHz sound can penetrate through organic or light sediments, measuring the depth till the hard bottom.

That creates the possibility of mapping the depth and measuring the thickness and amount of sediments in the water body.

Note: the dead zone for 50 kHz is 1m, and the minimum practical survey depth will be around 1.2m.

EchoLogger ECT D052S is a dual-frequency echo sounder with tilt and temperature sensor.