FIELD: food industry.
SUBSTANCE: invention relates to food industry, particularly to seals for closing vessels containing liquid. Seal for vessels includes cover for installation on neck of vessel, power supply unit connected through a control unit to a radiation unit, connected by a radiation propagation channel to output of drain channel of vessel, wherein power supply unit, control unit and radiation unit are installed in a sealed capsule placed in drain channel of vessel. In sealed capsule there is also a vibration sensor, and outside capsule there is a unit for generating a vibration signal, wherein vibration sensor is electrically connected to control unit and is acoustically connected to vibration signal generation unit.
EFFECT: seal according to invention provides reliable illumination of liquid jet only when flowing from vessel.
1 cl, 4 dwg
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