TaidacentNon-contact Electronic Water Level Sensor Water Tank Fish Tank Water Leak Detector Leakage Sensor Switch Level Gauge Detection Alarm

I like the fact that the simple documentation in the description is all that is needed. I connected the output to an ADC port on a raspberry pi pico, and it worked perfectly. I did have to use a logic level converter (3.3v, 5v), since the pico is a 3.3v device and this is a 5v device. I use mine to control a pump to fill a coffee machine reservoir.

I am using a Raspberry Pi Pico W (ADC inputs), so I can broadcast the level of my boats water tank.As the title says, I had to reverse the polarity (blue +5v, brown gnd) on the two sensors I bought to get anything at all from the black OUT line.Now I don't know if the sensors are just going to break over time because it says don't reverse..I tried the given circuit with an LED, and nothing at all happened.Also, the cables are very short, so I'll have to mount everything really closeI wouldn't buy these again.

Use this to monitor the black water level in a marine holding tank. Used a 12vdc to 5vdc power converter with a 5V One Channel Relay to turn on a led light when the tank is near capacity. Very cost effective.

I purchased 1 and it worked fine. It sinks about 5mA when the sensor is not near water and nearly 0 when it is near water. The instructions gave some nice example circuits for wiring an LED or a microcontroller. I did notice it is possible to have it not quite turn off all the way (it normally conducts until it is near water) if the wall of your water container has some drops on it. From a practical standpoint the implications of that are obviously project specific. For the most part it turns on and off quickly with no time spent in the linear region, straight to saturation.

I used this in a simple circuit to indicate when the Christmas tree needed to be watered. It worked great attached with double sided tape to the water bucket. The included documentation and sample circuits were very helpful.