The AquaSpy Vector Probe (https://aquaspy.com) measures soil moisture in scaled frequency (%), temperature, and electrical conductivity every 4” down from a depth of 4” to a depth of 48”. High scaled frequency corresponds to wet soil whereas low scaled frequency corresponds to dry soil. For installation, the manufacturer recommends using a 2-1/2” auger bit with slurry application. An installation video can be viewed at the following link (https://www.youtube.com/watch?v=8k2ad5oc_fg).