| 摘要 |
PROBLEM TO BE SOLVED: To provide a method including determining whether a product container of a micro-ingredient is empty.SOLUTION: A flow sensor 308 comprises: a fluid chamber 318 to receive a fluid of a micro-ingredient pumped out by a pump assembly 272; a diaphragm assembly 314 configured to be displaced when the fluid within the fluid chamber 318 is displaced; and a transducer assembly 328 configured to measure the displacement of the diaphragm assembly 314 and generate a signal based at least in part upon the quantity of fluid displacement within the fluid chamber 318. |
