DUNE is a next-generation long baseline experiment for neutrino oscillation physics. The SAND detector at the Near Detector complex is designed to perform on-axis beam monitoring, constrain uncertainties in the oscillation analysis and perform precision neutrino physics measurements. SAND exploits a 0.6 T superconductive magnet, an electromagnetic calorimeter made of lead scintillating fibres, a 1-ton novel liquid argon detector (GRAIN) and a modular low-density straw tube target tracker system. In this article, the major components of the SAND detector and their role in the measurements of nu/nu interactions are presented.