| 摘要 |
An arrangement for indicating the calcification status of flow heaters, particularly in espresso machines, with the flow heater having a cold-water inlet line and a hot-water outflow line, and which is intended to precisely indicate the calcification status, yet have an uncomplicated design. For this purpose, a differential-pressure fluid gauge (9) is provided, with the gauge having two pressure chambers (11, 12) separated by a diaphragm, with one of the pressure chambers (11) being in a fluid-conducting connection with the cold-water inlet line (4) and the other pressure chamber (12) being in a fluid-conducting connection with the hot-water outflow (5). The diaphragm acted upon by the pressure difference between the two chambers (11, 12) is coupled to indicator elements.
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