Soil Three-way Tester, 3-in-1 Plant Moisture , Light and PH Meter ( PH not accurate !! )

Product description: https://amzn.to/3gmnFK2
We received today Soil tester from Vivosun three-way meter (Moisture/PH/Light).

PH does not seem to be very accurate. In this video we tested device sensitivity to PH measurements using water/vinegar solution. We mixed 2 table spoons of 5% Vinegar with gallon of water, which resulted in the solution with expected ~5.5 PH. More details about proportions could be found in the link: https://bit.ly/3ee4jW1


As video shows during application of the solution to our blueberry bush, devices showed changes in PH level, however it moved back to initial levels of PH equal to 7, shortly after liquid drained. It is hard to believed that PH will change back to original so fast, so preliminary conclusion PH functionality o the device not very useful