Carbon nanotubes based multi-directional strain sensor

•An investigation of the behavior of an aligned CNT strain sensor, when strained at 45° regarding its alignment, is carried out.•Two sensor configurations (D and Sq) are considered and both sensors are sensitive to strain.•Relation between electrical anisotropy behavior and strain direction is stablished.•This small aligned strain sensor is suitable as a strain sensor quantifier and strain direction indicator.