Patent ID: 6578415
Filing Date: 2003-06-17
Classification: G01F

Abstract:
A limit-level sensor for determining whether an intended level of liquid in a container is not reached or is exceeded, the sensor being suitable for use with automotive liquids, the sensor comprising:a resistance element for receiving an electric current, the resistance element changing its electric resistance upon an increase in temperature; a measurement unit for measuring the electric resistance; a housing having a first housing part and a second housing part, said housing parts meeting to form a cage enclosing said resistance element; a bar extending within an transversely of said housing; connecting wires leading from the bar to the resistance element, a first of the connecting wires being disposed alongside a second of the connecting wires; wherein the resistance element is to be located entirely within a liquid of an intended level, the connecting wires are clamped between the first and the second housing parts by means of said bar to hold said resistance element fixed against oscillation and spaced apart from elements of said cage, a spacing between elements of the cage and the resistance element inhibiting dissipation of heat of the resistance element via the elements of the cage, and wherein the electric resistance varies abruptly above a transition temperature of the resistance element, the transition temperature lying above a maximum temperature of the liquid.