A few weeks ago, we took our nitrate sensor modules to the garden and tested them for nitrates and now we are pleased to report that they respond very well to varying levels of soil nitrate. The
sensors take about a day or two to stabilise followed by continuous readings. In order to check if they do respond to an increase in the nitrate content of the soil, we spiked the soil with
potassium nitrate (KNO3) solution. All the sensors showed a response to the sudden influx of nitrate, varying in magnitude depending on their location and positioning.
Over time, when the nitrate disperses in the soil, the readings also gradually reduce and stabilise again. These results are evidence of a sensitive and robust sensor module.
Another big step towards a successful product!
Here we have some examples of our sensor data: