Sensor device for conductivity measurement and method for its operation
First Claim
1. A sensor device for conductivity measurement for an electrical appliance having a water duct with contaminated water, wherein said sensor device has a sensor carrier, said sensor carrier having two electrodes as sensors for said conductivity measurement,wherein said two electrodes are connected directly without further components or further coupling circuits to a transformer configured to be connected to a control unit,wherein said transformer is positioned on said sensor carrier with a spacing from one of said two electrodes wherein said spacing is of the same order of magnitude as the spacing between said two electrodes,wherein said electrodes and said transformer form a common module on a common printed circuit board comprising electrical connections in the form of conducting tracks on said printed circuit board between said electrodes and said transformer, andwherein further sensors are provided on or in a sensor housing and are exposed to outside of said sensor housing.
1 Assignment
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Accused Products
Abstract
A sensor device for insertion into a water channel in a washing machine is provided with two electrodes as sensors on a sensor carrier. These electrodes are in direct contact with the water through apertures. The electrodes are connected to a transformer on the sensor carrier directly and without any further components or couplings being required. The other side of the transformer is connected to an activating and evaluating means, in particular to a microprocessor positioned on the same carrier.
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Citations
13 Claims
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1. A sensor device for conductivity measurement for an electrical appliance having a water duct with contaminated water, wherein said sensor device has a sensor carrier, said sensor carrier having two electrodes as sensors for said conductivity measurement,
wherein said two electrodes are connected directly without further components or further coupling circuits to a transformer configured to be connected to a control unit, wherein said transformer is positioned on said sensor carrier with a spacing from one of said two electrodes wherein said spacing is of the same order of magnitude as the spacing between said two electrodes, wherein said electrodes and said transformer form a common module on a common printed circuit board comprising electrical connections in the form of conducting tracks on said printed circuit board between said electrodes and said transformer, and wherein further sensors are provided on or in a sensor housing and are exposed to outside of said sensor housing.
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10. A sensor device for conductivity measurement for an electrical appliance having a water duct with contaminated water, wherein said sensor device has a sensor carrier, said sensor carrier having two electrodes as sensors for said conductivity measurement,
wherein said two electrodes are connected directly without further components or further coupling circuits to a transformer configured to be connected to a control unit, wherein said electrodes and said transformer are located in an interior of a sensor housing, and an electrical connection is provided at an end projecting from a rear of said sensor housing of a common printed circuit board for an electrical connection to said electrodes and said transformer and wherein further sensors are provided on or in said sensor housing and are exposed to outside of said sensor housing.
Specification