| CPC G01F 23/0007 (2013.01) [A01M 1/2022 (2013.01); G01F 23/265 (2013.01)] | 15 Claims |

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1. Removable signaling device of the exhaustion of a dispenser/diffuser of a liquid active substance contained in a container of said dispenser/diffuser, the removable signaling device comprising: a central body from which project two opposite lateral arms, which surround at least part of said dispenser/diffuser, and an appendix which extends alongside said container, in a vertically adjustable position with respect to the central body and the lateral arms, and carries a self-powered liquid sensor facing said container.
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