Deep Sea Thermometer
With this Deep Sea Thermometer you can measure the temperature of the sea water at any depth you wish.
As you immerse the thermometer in the sea/lake the water enters the special case at the bottom of the device through the holes it has.
Thus leaving the device at the depth where we want to measure the temperature, the container is filled with water of the same temperature as the water of this specific depth.
So when we bring it back to the surface of the sea/lake in the container there is still the water sample from the depth we want to measure.
Our thermometer that is in contact with the water in the container shows its temperature.
The thermometer shows from 0 to 50 °C.