I currently have several Netro Whisperer 2 sensors and receive moisture, temp and solar readings. But i also have other soil sensors - e.g., Ecowitt. The two sensors appear to measure soil moisture on different scales. Can someone - from Netro - explain to me clearly how the Whisperer measures moisture and how I should interpret different readings in the same bed (e.g., Ecowitt measures 28%, Whisperer measures 96%).