| 摘要 |
<p>A percolating filter device (l)of the type with a replaceable cartridge (9) includes a device (10) for indicating the service life cycle of the cartridge (9) for the purpose of indicating the exhaustion of the cartridge (9 ) when the cartridge (9) is due to be replaced and an electrical switch device for selecting and/or activating a function of the indicator device (10), the indicator (10) device including a capacitive proximity switch with an operating electrode fitted on the filter device (1).</p> |
