A frequent check of glucose level is necessary for diabetics to control their glycaemia and thus avoid undesirable complications such as kidney failure, lower limb amputation, stroke, heart attack. While most commercially-available devices are based on invasive or minimally invasive methods for glucose monitoring, other methods were also developed using optical techniques. However, these methods are sensitive to physiological changes and are costly to implement. In order to perform non-invasive and affordable measurements of blood glucose level for diabetics, a microstrip sensor operating in the centimeter-wave band (2.3GHz) has been developed. The proposed sensor is based on an array of hexagonal-shaped complementary split ring resonators (CSRRs) in a honey-cell configuration. It was fabricated on a low cost FR4 substrate and first tested in vitro with glucose aqueous solutions placed onto the sensor. To validate its detection capability for sensing glucose level variations and tracking diabetes, a human fingertip model has been developed. This paper presents 3D full-wave electromagnetic field simulations of the sensor loaded by various fingers and primarily experimental results by studying pressure effect on the sensor.