The Turf Guard Wireless Soil Monitoring System. Get the essential soil information you need, when you need it. Stay up to date on your current soil conditions no matter where you are. Get the information you need to make important decisions in real time. Turf Guard sensors instantly track soil moisture, salinity, and temperature, saving you time. Repeaters mount easily inside all Toro Network VP® , Network LTC® Plus, and E-OSMAC® satellite pedestals.