The ST-1 is a sensor for monitoring soil temperature values in precision farming and environmental monitoring applications.tbsmp01a tbsmp01b The ST-1 has been designed to work in any type of soil. It has a low current consumption and an SDI-12 interface. It is ideally suited for battery or solar powered remote applications. The ST-1 has short measurement time and fast response to any changes in the soil temperature. It is easy to install and easy to calibrate. The ST-1 is a rugged, hermetically sealed design, equipped with a polyurethane protected cable.