An apparatus (1) and plurality of sensors where the apparatus (1) comprises: a plurality of coupling elements (7); a plurality of attachment portions (13) configured to enable a plurality of sensors to be removably attached to the apparatus (1); at least one processor (3); and at least one memory (5) including computer program instructions (11); wherein the at least one memory (5) and the computer program instructions (11) are configured to, with the at least one processor (3), enable the apparatus (1) to individually address each of the plurality of coupling elements (7) to obtain a reading from each of the plurality of sensors attached to the apparatus (1).