What is the real name for the thing that counts the number of people that go into and out of a store called?

Question

It's the thing next to the door that counts how many people go in and out of a store. I need one for my new store, but I don't know where to get one. Could you include any links to one if you know where they can be purchased?

Answer 1

It is a people counter

http://www.peoplecounters.com/