A clamp-on multimeter for measuring alternating current in an electrical conductor of an electrical circuit, comprising: a first sensor comprising a clamp (142a, 142b) configured to inductively sense the alternating current without breaking the electrical circuit to generate a first signal in a first voltage range, wherein the first sensor has a magnetizable material core, wherein the clamp is movable between an open arrangement and a closed arrangement, wherein the open arrangement is configured to permit the electrical conductor through a gap between the first and second clamp portions, and the closed arrangement is configured to close the gap and thereby surround the electrical conductor with the first and second clamp portions; wherein the multimeter is characterized by: a second sensor comprising a Rogowski coil configured to inductively sense the alternating current without breaking the electrical circuit to generate a second signal in a second voltage range, wherein the second sensor has a non-magnetic core in a loop having a smaller cross-section than the first and second clamp portions (142a, 142b) of the first sensor; an integrator configured to scale a signal from the second sensor in the second voltage range to the first voltage range of a signal from the first sensor, wherein the second voltage range of the signal from the second sensor is different from the first voltage range of the signal from the first sensor; and a selector configured to select the first signal or the second signal as an input signal for measuring the alternating current in the electrical conductor a housing, wherein the integrator is included in the housing. a first sensor comprising a clamp (142a, 142b) configured to inductively sense the alternating current without breaking the electrical circuit to generate a first signal in a first voltage range, wherein the first sensor has a magnetizable material core, wherein the clamp is movable between an open arrangement and a closed arrangement, wherein the open arrangement is configured to permit the electrical conductor through a gap between the first and second clamp portions, and the closed arrangement is configured to close the gap and thereby surround the electrical conductor with the first and second clamp portions; wherein the multimeter is characterized by: a second sensor comprising a Rogowski coil configured to inductively sense the alternating current without breaking the electrical circuit to generate a second signal in a second voltage range, wherein the second sensor has a non-magnetic core in a loop having a smaller cross-section than the first and second clamp portions (142a, 142b) of the first sensor; an integrator configured to scale a signal from the second sensor in the second voltage range to the first voltage range of a signal from the first sensor, wherein the second voltage range of the signal from the second sensor is different from the first voltage range of the signal from the first sensor; and a selector configured to select the first signal or the second signal as an input signal for measuring the alternating current in the electrical conductor a housing, wherein the integrator is included in the housing. a second sensor comprising a Rogowski coil configured to inductively sense the alternating current without breaking the electrical circuit to generate a second signal in a second voltage range, wherein the second sensor has a non-magnetic core in a loop having a smaller cross-section than the first and second clamp portions (142a, 142b) of the first sensor; an integrator configured to scale a signal from the second sensor in the second voltage range to the first voltage range of a signal from the first sensor, wherein the second voltage range of the signal from the second sensor is different from the first voltage range of the signal from the first sensor; and a selector configured to select the first signal or the second signal as an input signal for measuring the alternating current in the electrical conductor a housing, wherein the integrator is included in the housing.