Soil Moisture Sensor, Vantage Pro2™ and EnviroMonitor® - SKU 6440Watermark soil moisture sensor uses electrical resistance to measure the moisture level of the soil. Does not require periodic maintenance during the growing season. Simply bury at the desired depth, then monitor moisture levels throughout the season. The Soil Moisture Sensor must be connected via a Leaf & Soil Moisture Temperature Station (#6345) (up to four sensors), or an EnviroMonitor Node. Includes 15 (4. 6m) cable. Highlights Click here to learn