Level sensor for a coffee or tea maker, has a simple optoelectronic detector arrangement that can be used with containers of varying size and liquid or material tea or coffee making products

摘要

Coffee or tea maker has a container (3) with a liquid or material level sensor comprising a transmitter (1) and receiver (2) for detection of radiation transmitted by the transmitter. The wall of the container (8) is at least partially transparent in the area of the transmitted beam. An Independent claim is made for a dosing device for a coffee or tea maker with a liquid or material level sensor that works with both liquid and powder products. If the container for the agent is full above a minimum level then no signal will be received by the detector. Only when the level falls below the minimum will a signal be detected, said signal then being used to trigger a warning light, etc.