I've just come across a no-name non-contact, high-precision 80 GHz mmWave radar sensor for liquid level detection with a 40m ...

Here is a tested Arduino project that uses 3 sensor probes as water level indicator with 3 leds and one LCD display + a simple controller that turns on a motor when the water has reached the desired ...

The sensor is an on-off type, switching state when the liquid level passes a fixed point on the sensor body. It is pre-adjusted, but also includes a training mode that needs to be initiated some ...