초록 ▼

The present invention provides a probe for measuring the level of a liquid, including a conductor partially immersed in said liquid and whose degree of immersion depends on said variable level to be measured, the resistivity of which conductor depends on the temperature. The conductor is for example

The present invention provides a probe for measuring the level of a liquid, including a conductor partially immersed in said liquid and whose degree of immersion depends on said variable level to be measured, the resistivity of which conductor depends on the temperature. The conductor is for example etched on an insulating support which is a better conductor of heat than air. The result is a very good linearity for rapid measurements, higher accuracy and a great mounting simplicity.

대표청구항 ▼

A probe for measuring the level of a liquid in a reservoir which is at least partially filled with said liquid, said probe comprising: a first insulating support member; a conductor of given length made from a material whose resistance depends on its temperature, said conductor being supported on sa

A probe for measuring the level of a liquid in a reservoir which is at least partially filled with said liquid, said probe comprising: a first insulating support member; a conductor of given length made from a material whose resistance depends on its temperature, said conductor being supported on said first insulating support member; a second insulating support member spaced apart from said first insulating support member; a pair of elongated metal pieces supported on said second insulating support member, said metal pieces having first ends and second ends, said first ends forming output electrodes of said probe, said second ends being electrically connected to said conductor and supporting said conductor, said first ends being adapted to be connected to a constant current source such that said conductor can be heated by said constant current source; means for mounting said metal pieces on said reservoir so that said conductor is in said liquid over a first part of its length and in a gaseous medium over a non-immersed second remaining part of its length; and measuring means connected to said conductor for measuring a voltage drop at said conductor as an indication of said level of said liquid.