I used the SoilWatch 10 sensor and 2 DS18B20 thermometers in a Soil Moisture project. The project involves sending soil moisture and temperature data via a LORA module with the possibility of saving data every 5 minutes on an IOT portal. At first I had used a low-cost capacitive sensor, but I had been disappointed both by how it was made and by the data it gave. Replaced with Pino-Tech's SoilWatch10 it now works fine.
The product works fine for gardening. Due to its high frequency of operation it is resistant to salts.But it is not suitable for any research purpose. The waterproofing is excellent and you can expect a much longer life than the other cheap sensors.
Product is well made and documentation is good. I initially tested by weighing soil in a plastic container, then adding water and weighing again when saturated. I recorded sensor output and weight as water evaporated over several days and came up with a rather non-linear output voltage output vs. average % water. However, I realized I was assuming the water loss was uniform throughout the volume when it really isn't. I repeated the experiment, mixing the soil each day to ensure the moisture was uniformly distributed. This time the sensor output and % water showed a very linear response over the full span. This does bring up the important point that the sensor measures moisture only in its immediate vicinity - the moisture will be very different in pot center vs. edges, so place accordingly. Next I plan to bury one sensor at 1ft deep and another 3ft deep to monitor soil moisture for my orange tree. Definitely recommended.
Great Product. Good sentitivity along a width range of soil moisture. Very well insensitive to other influences than humidity. Will for sure last for long time due to the way it is build.
For Next Version ? : - with I2C interface instead of analog output. (ADC accuracy and stability dépends more on the wires and the CU ship used than on the sensor itself. - use conventionnal colors in wires : black = GND, red = Vcc, other color as Output.
I haven't actually used the products yet, however if the build quality is anything to go by it will perform great. Its a product thats been built to last. Plenty of thought has gone into creating something that is of high quality and can be deployed with confidence. Will update review once I have these things running.
I have only a very short experience with the sensor but here is what I can say after just one week of usage.
First of all, many thanks for having accepted producing a 0->3v output version. This is the one I use. I experimented quite a lot with the sensor before actually using it in real conditions and I noticed that it returns very consistent, repeatable results. It has an excellent precision, returning results that you can follow down to the level of 0.01v
My next good surprise is that it has an excellent isolation to the unwanted influence of its surroundings. Sometimes, in this kind of sensors, just approaching your hand to the cable will deeply influence the reading. Not in this case, well done ! Another very strong point is that as far as I have tested, I have not noticed an influence of the temperature on the reading. Perfect !
All in all, you produced a great little sensor that will find usage in many applications.
There are only two things that would worry me for some time. First is: will these great performances deteriorate in time or not. I was using an other capacitive sensor and roughly after 2 years the readings were not consistent any more. I guess time will say...
Second is: I hope you will be successful enough to keep producing these. I would hate having to go back to the "other" brand :-)
I want to congratulate you for this achievement. I will keep experimenting with the sensors and buy some more in the future.