| 摘要 |
A water filter (2) equipped with a memory device (1) that monitors the programmed useful life of that water filter - by length of time in use and/or by the total volume of water filtered. This device has the ability to warn the user of imminent filter expiration and, ultimately, of actual expiration, either by time in use or volume filtered, whichever limit occurs first. This device is further capable of transmitting signals, and/or deactivating or activating other functions dependant upon a properly functioning water filter. The memory device (1) is tamper proof and self destructs if tampering is detected or when the life of the water filter (2) has expired, thereby rendering the water filter (2) permanently useless. |
