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 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.

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.

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.

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.

It works perfectly. The most dissatisfaction is it rusted so fast and stopped working! it only lasted for one week and i need to replace!

This product is ok for use in student and hobby projects.For application as a soil moisture sensor for long periods of time, it is recommended to power the electronic module automatically to turn it on only when taking measurements, turning it off immediately when finished and thus minimize electrolytic corrosion. You can also swap the connections of the sensing element periodically so that the two electrodes rotate polarity.

These do not work as a soil moisture sensor longer than a couple of days. The probe corroded within several days rendering it useless for the advertised purpose. Getting it setup with an Arduino Uno was fairly simple and readings were accurate and consistent while the probe lasted.Very cool idea if the probes lasted longer than several days.

it did the job but I bought them before i knew the difference between capacitive and resistive sensors....but overall happy with my purchase