Abstract: A device for preventing foam or air bubbles from accumulating in a measuring zone of a turbidity sensor connected in a wash-water circuit of a dishwasher or washing machine includes a main flow conduit and a bypass conduit connected to the main flow conduit. The bypass conduit includes a first conduit section branching off from the main flow conduit, a second conduit section leading back into the main flow conduit at a junction, and an enlarged region of reduced flow velocity connected upstream of the junction. The enlarged region provides the measuring zone for the turbidity sensor, and includes a curved baffle and a downward-facing bulbous protuberance opposite the baffle so as to form a backflow region. The measuring zone is located within the backflow region in the bulbous protuberance.

Abstract: A method for operating a vacuum cleaner having a fan, an electronic control system for the fan and/or another load, and a dust chamber for receiving an air-permeable dust bag, includes providing the dust bag with an identifier, and providing the vacuum cleaner with an identifying device associated with the electronic control system and configured to identify the identifier. When the identifier fails to be identified, at least one of the fan and the other load is controlled using the electronic control system so as to reduce at least one parameter associated with an intake of dust into the dust bag.

Abstract: A device for preventing foam or air bubbles from accumulating in a measuring zone of a turbidity sensor connected in a wash-water circuit of a dishwasher or washing machine includes a main flow conduit and a bypass conduit connected to the main flow conduit. The bypass conduit includes a first conduit section branching off from the main flow conduit, a second conduit section leading back into the main flow conduit at a junction, and an enlarged region of reduced flow velocity connected upstream of the junction. The enlarged region provides the measuring zone for the turbidity sensor, and includes a curved baffle and a downward-facing bulbous protuberance opposite the baffle so as to form a backflow region. The measuring zone is located within the backflow region in the bulbous protuberance.

Abstract: A circuit arrangement for preventing the discharge of a battery powering a signal evaluation circuit while the circuit is in a stand-by mode, provided with a sensor for generating signals and means responsive to the generation of signals for connecting the battery to the signal evaluation circuit and for disconnecting the battery in the absence of signals. The signal responsive means include an amplifier for triggering a monostable flip flop the output of which controls the conductivity of a transistor between the battery and the signal evaluation circuit.

Abstract: A circuit arrangement for preventing the discharge of a battery powering a signal evaluation circuit while the circuit is in a stand-by mode, provided with a sensor for generating signals and means responsive to the generation of signals for connecting the battery to the signal evaluation circuit and for disconnecting the battery in the absence of signals. The signal responsive means include an amplifier for triggering a monostable flip flop the output of which controls the conductivity of a transistor between the battery and the signal evaluation circuit.