Importance

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Abstract

Method for monitoring the amount of liquid of an extinguishing liquid container (1) of a fire-fighting apparatus. The extinguishing liquid container (1) is filled with extinguishing liquid such that a predefined volume (6) remains unfilled, the extinguishing liquid container is pressurized with a gas, e.g. using the filling connector (2), to the standby pressure (P2), which is higher than the switching point (Psw) of the pressure sensor or pressure switch (3), in which case when the amount of extinguishing liquid (5) in the extinguishing liquid container (1) decreases, the pressure (P2) of the extinguishing liquid container (1) decreases from the standby pressure (P2) as the proportion of the volume of the gas expands, in which case as a consequence of the decrease in the amount of extinguishing liquid and when the pressure decreases from the standby pressure to a second, lower value, which is set as the switching limit (Psw) of the pressure sensor or pressure switch (3), the pressure sensor or pressure switch (3) gives a signal, on the basis of which a notification is obtained about the low amount of liquid in the extinguishing medium container. The invention also relates to an apparatus.

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First Claim