Adaria’s vending machines feature product delivery sensors, which guarantee that selected items are properly delivered to the customer. An infrared emitter at the bottom of the bin detects product delivery. In the event that a product is not delivered (i.e. gets stuck), the vending machine will try up to 3 times to dispense the product. If the sensor is still unable to detect product, the machine will allow the customer to make another selection or obtain an immediate refund.