FIELD: physics.;SUBSTANCE: anti-theft system for protecting commodities which can be openly accessed has safety sensors attached to said commodities and which are connected by connection cabled to at least one extended unit which can transmit signals from the connected safety sensors to a central control unit. The central control unit can be switched on by a mechanical switch or chip and security modes can be programmed from the chip, and can also be powered by a built-in standalone power supply when the central power system is switched off. Safety sensors are combined with the function for simultaneous detection of the container of the protected commodity and illumination of the said commodity.;EFFECT: high reliability of anti-theft signalling.;2 cl, 1 dwg
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