Frost susceptibility of soil is important parameter in construction of buildings in silt (clay) soil and cold regions. Therefore experimental investigation of frost susceptibility has high importance. Definition of frost characteristics soil predicts unsuspectible deformations of soil ground. Also extra measures could be predicted for lowering frost susceptibility. In-situ monitoring of frost depth is measure which also important for designing of soil ground. Frost depth monitoring system gives freezing depth results and moisture content for prediction of frost susceptibility of soil.