Abstract: The invention provides a multiple coin detecting apparatus for use in coin-operated machines for discriminating between denominations of coins and genuineness of coins, so as to exclude from operation of the machines any coins which have not been specifically selected for acceptance. Essentially, the apparatus consists of a coin receiving and guiding free-fall chute of insulating material having a hollow core for receiving coins. An instantaneous analysis is made of the material of the coin near the entry of the chute and the apparatus immediately directs predetermined acceptable coins to an acceptance slot, and all other unacceptable coins are directed to the rejection slot. The analysis is made by a coil which surrounds the hollow chute and comprises a primary coil and a secondary coil.