A large number of European vending machines still accept the 10 thai baht coin as a 2 Euro coin (10 baht are approx. 30 cents). I heard the newer machines use

A large number of European vending machines still accept the 10 thai baht coin as a 2 Euro coin (10 baht are approx. 30 cents). I heard the newer machines use a combination of methods, including weight and electrical resistance to test if a coin is actually the right one.