The betting sensor for determining the value of a bet includes an at least partially transparent cover, the at least partially transparent cover is provided with a surface for placement of the bet, and the surface for placement of the bet is configured to be capable of supporting a pile of game tokens. The bet sensor comprises a mirror device which is arranged on a side, opposite to the surface for placement of the bet, of the at least transparent cover. The mirror device is positioned and configured to provide a 180 degree viewing field greater than a lateral side surface of the pile of game tokens when supported on the surface for the placement of the bet. Another bet sensor may include an at least partially transparent cover plate and an image sensor, the at least partially transparent cover plate has a surface for placement of the bet, the image sensor is generally positioned right below the surface for placement of the bet, and the image sensor is configured to capture images larger than 180 degree images of lateral side surfaces of the pile of game tokens when being supported on the surface for placement of the bet.