The GBSMP is a sensor for monitoring soil moisture levels and soil temperature values in precision farming and environmental monitoring applications. It provides the data required for cost efficient irrigation, crop yield optimisation and protection of natural resources. The GBSMP 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 GBSMP has short measurement time and fast response to any fluctuation in the soil moisture level. It is easy to install and easy to calibrate. The GBSMP is a rugged, hermetically sealed design, equipped with a IP67 connector and customizable cable length. Its advanced soil specific calibration capability gives volumetric readings with high absolute accuracy.