Nothing in the manual gives me an indication that it has a drop sensor. This is a description of how the machine dispenses an item:
The RAM 4000 Vending Machine from AVT, Inc. comes standard with configurable trays and augers, especially designed for the selling of snack goods and beverages with larger packaging. It has an optional feature that can detect errors in the vending machine.; the function of LED display ; It also has a large-scale display window, a user friendly interface, all of which are easy for the operator to use.The computer controller transfers the relative information accordingly. The main-control system will send a signal to the drivers to revolve the motor to release the goods. The goods will be dropped to the delivery port directly. It can give the change automatically or the user can use the give change knob to get the change.