HiLetgo 5pcs LM393 3.3V-5V Soil Moisture Detect Sensor Soil Moisture Sensor Soil Hygrometer Detection for Arduino Automatic Watering System Robot Smart car

I gave this a 5 star review, mostly because it does it's job. It works great if you are wanting it to detect a water leak. However if you want it to detect soil moisture, it will quickly corrode. There are some hacks to make it last longer by turning the power on/off so current isn't always running through it, but really for what you're paying, you cannot expect the same thing as a $100 moisture sensor. It makes a great DIY "hey look what I can do" project for not much money.

These are beautifully cheap and they work great. Just don’t expect it to last more than a week in soil. More repeatable than I expected and dead simple to use with an arduino.

Needed these sensors for a school project. Worked as expected and didn't need to calibrate them. Very happy with my purchase.

I am taking a point off for the wrong indication, you do not want to put this into soil it will corrode. It would also need an AC circuit to make it not corrode which you would need to modify this circuit to support. It is much better as a leak or water detection device. This is what I am using it for, to detect water leaks, in my setup. The device will self destruct if you leave it in water for any length of time. It will plate out you can put some conformal coating on it to help it last a bit longer in water, in the end though it is not the right part for soil moisture detection as advertised. If you are looking for a soil moisture detector you are better off with a capacitive style sensor.

Good product, so far has held up against the application of use, easy to work with the Adriuno, accuracy is dependent upon programing and setup, once complete, it is great for its size.

I purchased the HiLetgo 5pcs LM393 Soil Moisture Sensor for use with my Pico W, and it worked seamlessly. I hooked it up to a small LCD via the breadboard and received accurate moisture output. It was a fun experiment to undertake. However, my wife had different ideas when it came to testing the moisture levels of her plants—she preferred using her finger! Nonetheless, for anyone interested in DIY projects or exploring soil moisture sensing, this sensor is a reliable and affordable option.

Died after about a week of full usage. Would need to use logic to turn off the sensor for x amount of time after a read for it to last longer.

The probe corroded within a day or two of use. There's a very thin metal filament that allows the probe to sense water based on fluctuations in resistance due to the presence of water. Unfortunately, this thin metal filament corrodes fast, which means soon you'll only be picking up a signal that is inaccurate, and can mess up your project if you're not looking for it.