Level sensor has a simple optoelectronic detector arrangement that can be used with containers of varying size and liquid or material products and is suitable for indicating the presence or absence of a given amount of product

摘要

Level sensor for detecting the presence or absence of a liquid or material within 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 and sloping in the area of the transmitted beam. As the wall of the container is sloping when the transmitted beam is incident on it, the transmitted beam will only reach the detector when the container is empty and the beam is not diffracted away by liquid or absorbed by solid material.