An integrated device provides a measure of a quantity dependent on current through an electrical conductor, having: a sensing and processing sub-system; an electrical conductor conducting current; an insulating material encapsulates the sensing and processing sub-system and maintains the electrical conductor in a fixed and spaced relationship to the sensing and processing sub-system. The insulating material insulates the electrical conductor from the sensing and processing sub-system. Sensing and processing sub-system sensing circuitry includes magnetic field sensing elements adjacent the electrical conductor. The sensing circuitry provides a measure of the quantity as a weighted sum and/or difference of magnetic field sensing elements outputs caused by current through the electrical conductor adjacent the magnetic field sensing elements. A voltage sensing input senses a measure of voltage associated with the current conductor. Sensing and processing sub-system output circuitry provides an output measure of the quantity from the sensed measure of current and voltage.

An integrated device provides a measure of a quantity dependent on current through an electrical conductor, having: a sensing and processing sub-system; an electrical conductor conducting current; an insulating material encapsulates the sensing and processing sub-system and maintains the electrical conductor in a fixed and spaced relationship to the sensing and processing sub-system. The insulating material insulates the electrical conductor from the sensing and processing sub-system. Sensing and processing sub-system sensing circuitry includes magnetic field sensing elements adjacent the electrical conductor. The sensing circuitry provides a measure of the quantity as a weighted sum and/or difference of magnetic field sensing elements outputs caused by current through the electrical conductor adjacent the magnetic field sensing elements. A voltage sensing input senses a measure of voltage associated with the current conductor. Sensing and processing sub-system output circuitry provides an output measure of the quantity from the sensed measure of current and voltage.

A measurement circuit is arranged to make several measurements, either at different times or in respect of different frequency components of currents measured by current sensors in respective phases of a multiphase supply system. The measurements are then used to correct for discrepancies in the transfer function of the sensors.

A measurement circuit is arranged to make several measurements, either at different times or in respect of different frequency components of currents measured by current sensors in respective phases of a multiphase supply system. The measurements are then used to correct for discrepancies in the transfer function of the sensors.

An integrated device provides a measure of a quantity dependent on current through an electrical conductor, having: a sensing and processing sub-system; an electrical conductor conducting current; an insulating material encapsulates the sensing and processing sub-system and maintains the electrical conductor in a fixed and spaced relationship to the sensing and processing sub-system. The insulating material insulates the electrical conductor from the sensing and processing sub-system. Sensing and processing sub-system sensing circuitry includes magnetic field sensing elements adjacent the electrical conductor. The sensing circuitry provides a measure of the quantity as a weighted sum and/or difference of magnetic field sensing elements outputs caused by current through the electrical conductor adjacent the magnetic field sensing elements. A voltage sensing input senses a measure of voltage associated with the current conductor. Sensing and processing sub-system output circuitry provides an output measure of the quantity from the sensed measure of current and voltage.

An integrated device provides a measure of a quantity dependent on current through an electrical conductor, having: a sensing and processing sub-system; an electrical conductor conducting current; an insulating material encapsulates the sensing and processing sub-system and maintains the electrical conductor in a fixed and spaced relationship to the sensing and processing sub-system. The insulating material insulates the electrical conductor from the sensing and processing sub-system. Sensing and processing sub-system sensing circuitry includes magnetic field sensing elements adjacent the electrical conductor. The sensing circuitry provides a measure of the quantity as a weighted sum and/or difference of magnetic field sensing elements outputs caused by current through the electrical conductor adjacent the magnetic field sensing elements. A voltage sensing input senses a measure of voltage associated with the current conductor. Sensing and processing sub-system output circuitry provides an output measure of the quantity from the sensed measure of current and voltage.

The invention relates to a method of determining power consumption of an electrical heating system, where the power consumption is defined by a reading of information from a conductor (4, 6) within a thermostat (1). The invention further relates to a thermostat comprising an element for determining the power consumption of an electrical heating system, where the thermostat (1) is provided with a reading element (5) for reading current from a conductor (4, 6) and a reading element (28) reading voltage from a transformer output.

The invention relates to a method of determining power consumption of an electrical heating system, where the power consumption is defined by a reading of information from a conductor (4, 6) within a thermostat (1). The invention further relates to a thermostat comprising an element for determining the power consumption of an electrical heating system, where the thermostat (1) is provided with a reading element (5) for reading current from a conductor (4, 6) and a reading element (28) reading voltage from a transformer output.

A system includes at least one electric field sensor and at least one magnetic field sensor, wherein the at least one electric field sensor and the at least one magnetic field sensor are formed as an integrated sensor unit with a single electrical circuit, and wherein the integrated sensor is configured to measure power of an energized cable.

A system includes at least one electric field sensor and at least one magnetic field sensor, wherein the at least one electric field sensor and the at least one magnetic field sensor are formed as an integrated sensor unit with a single electrical circuit, and wherein the integrated sensor is configured to measure power of an energized cable.