Coin sensor system for vending machines

3 Vending Machine You've come across a collection of unusual vending machine money slot Vending Machine Coin Slot Coin Accepted model AH88 New with warranty 6 months vending machine slot demo Type: Vending Machine Snack & Beverage Combo Card Reader or Cash Slot + Card Reader option See full description

vending machine slot Will pouring salt water into the coin slots of vending machines induce them to dispense free product?