Hi I have a fish pond, and wants to detect if water is lower than given level A. On level A I can mount a sensor. The environment is outside and a bit harsh, so HW must be high quality, but not super expensive. Function: when water drops under level A, I get an alarm. My idea is to measure if t…

ALarm when water goues under a given level

LarryD March 28, 2024, 4:36pm 2

Suggest you use a float with Magnet.
When the float/magnet lowers (water falls) a Hall Effect switch is triggered, sending a signal to an Arduino.

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