초록 ▼

A liquid level meter is provided for measuring a level of a liquid (1) in a container (3), which meter measures acceptably in the case of liquids with low dielectric constants, and the installation and maintenance of which are simple and cost effective. This meter comprises an electronic circuit (13

A liquid level meter is provided for measuring a level of a liquid (1) in a container (3), which meter measures acceptably in the case of liquids with low dielectric constants, and the installation and maintenance of which are simple and cost effective. This meter comprises an electronic circuit (13), which generates electromagnetic signals in operation, a conductor (7), which projects into the container (3), along which a float (11, 11a, 11b, 11c, 11d, 11e) moves along with the level, which has at least one segment reflecting electromagnetic signals, an injector (9), which transmits the signals from the circuit (13) to the conductor (7), which conductor (7) leads the signals into the container (3) and leads out a signal reflected at the float (11) and a receiving and evaluating circuit (15), which receives the reflected signals, which determines a travel time of the signals and which ascertains the level from the travel time.

대표청구항 ▼

[ What is claimed is:] [1.]1. A liquid level meter for measuring a level of a liquid in a container comprising:an electronic circuit to generate electromagnetic signals;an injector coupled at an opening of the container, said injector to transmit said electromagnetic signals from said electronic cir

[ What is claimed is:] [1.]1. A liquid level meter for measuring a level of a liquid in a container comprising:an electronic circuit to generate electromagnetic signals;an injector coupled at an opening of the container, said injector to transmit said electromagnetic signals from said electronic circuit;a conductor that extends from said injector into the container, said conductor to transmit said electromagnetic signals from said injector into the container and lead reflected electromagnetic signals out of the container;a float coupled to said conductor that permits said float to move along said conductor in conjunction with the level of the liquid in the container, said float comprising at least one segment to generate said reflected electromagnetic signals by reflecting said electromagnetic signals led to the float by said conductor; anda receiving and evaluating circuit to receive said reflected electromagnetic signals, determine a travel time based upon said reflected electromagnetic signals, and ascertain the level of the liquid in the container from said travel time.