An electromagnetic field sensor includes a conductor plate, a signal output terminal to output a potential difference between the conductor plate and the signal output terminal, and a linear conductor including a first end electrically connected to a plate face of the conductor plate and a second end opposite to the first end and provided with a signal output terminal. The electromagnetic field sensor includes a loop plane that is formed by the conductor plate and the linear conductor and orthogonal to a plate face of the conductor plate when viewed from the side.

A first magnetic field generator generates a magnetic field intersecting a detection object being transported along a transport path. A second magnetic field generator opposite to the first magnetic field generator with respect to the transport path generates a magnetic field intersecting the detection object. A first magnetoresistive element between the first magnetic field generator and the transport path outputs, as a change in resistance, a change in magnetic flux density produced by transport of the detection object. The first and second magnetic field generators are different in a magnetic pole facing the transport path and are arranged with a center of the first magnetic field generator in a transport direction of the detection object and a center of the second magnetic field generator in the transport direction are located at mutually different positions. The first magnetoresistive element includes a first resistor and a second resistor arranged with spacing therebetween.

A magnetic sensor includes a magnetic sensor chip that includes a magnetoresistive effect element and a sealed part. The magnetoresistive effect element includes a free layer and a pinned layer. The sealed part has a first surface and a second surface, which is opposite the first surface. The shape of the sealed part in the plan view from the first surface side is substantially quadrilateral. The substantially quadrilateral shape has a first side and a second side, which are substantially parallel to each other. In the plan view, from the first surface side of the sealed part, the magnetization direction of the pinned layer, in a state in which the external magnetic field is not applied on the magnetoresistive effect element, is inclined with respect to an approximately straight line found through the least squares method using a plurality of points arbitrarily set on the first side.

A current sensor includes: plate-shaped bus bars; a magnetic detection portion; and a shell holding the bus bars. The bus bars are arranged in a first direction. At least some of the bus bars have: a first conductor portion extending in the first direction; a second conductor portion connected to one end of the first conductor portion and extending in a second direction crossing the first direction; and a third conductor portion connected to the other end of the first conductor portion and extending in a third direction. The bus bars at least include first and second bus bars adjacent in the first direction, where the width of the first conductor portion is greater than the thickness thereof, and when viewed from the third direction, the first conductor portions of the first and second bus bars are spaced apart from each other by a certain distance in the second direction.

A sensor package including a metal carrier and a sensor chip arranged on the metal carrier and having a first sensor element. In an orthogonal projection of the sensor chip onto a surface of the metal carrier, at least two edge sections of the sensor chip are free of overlap with the surface of the metal carrier. The sensor chip is designed to detect a magnetic field induced by an electric current flowing through a current conductor.

A magnetic sensor includes a magnetoresistive element having a sensitivity axis in a Y direction, a magnetic shield disposed apart in a Z direction from the magnetoresistive element and configured to attenuate the intensity of a magnetic field to be measured, and a magnetic balance coil. The magnetic shield includes a first shield part longitudinally extending in the X direction and second shield parts provided on either side of the first shield part. The first shield part has a portion that overlaps the magnetoresistive element when viewed in the Z direction. Each second shield part has a portion that overlaps the magnetoresistive element when viewed in the X direction. A magnetic path for a magnetic field in the X direction can be formed from one of the second shield parts to the other one of the second shield parts via the first shield part.

A first magnetic member is provided in a region farther inward than an outer peripheral edge of a first magnetoresistance element. A second magnetoresistance element is provided in a region farther inward than an inner peripheral edge of the first magnetoresistance element and is covered by the first magnetic member or is provided in a region farther outward than the outer peripheral edge of the first magnetoresistance element and is covered by a second magnetic member. A first conductor includes a first base section and a first narrow section. The area of the exterior surface of the first narrow section as viewed from a direction perpendicular to an insulating layer is smaller than that of the first base section. In the first conductor, the first base section and the first narrow section are arranged side by side in the direction perpendicular to the insulating layer.

In one aspect, an angle sensor includes a first linear sensor and a second linear sensor. A first magnetic-field direction of a target magnet measured by the first linear sensor is substantially equal to a second magnetic-field direction of the target magnet measured by the second linear sensor. The first linear sensor, the second linear sensor and the target magnet are on an axis. The angle sensor determines an angle of a magnetic field.

A dual-helmet magnetoencephalography measuring apparatus includes: an internal container storing a liquid refrigerant; an external container disposed to surround the internal container and including a first external helmet and a second external helmet disposed to be spaced apart from each other; a first sensor-mounted helmet disposed to surround the first external helmet between the external container and the internal container; a second sensor-mounted helmet disposed to surround the second external helmet between the externa container and the internal container; a plurality of first SQUID sensor module disposed on the first sensor-mounted helmet; and a plurality of second SQUID sensor module disposed on the second sensor-mounted helmet.

A magnetic sensor includes a magnetic field converter, a magnetic field detector, and a plurality of shields aligned in a Y direction. The magnetic field converter includes a plurality of yokes. Each yoke has a shape elongated in the Y direction, and is configured to receive an input magnetic field component in a direction parallel to a Z direction and to output an output magnetic field component in a direction parallel to an X direction. The magnetic field detector includes a plurality of trains of elements. Each train of elements includes a plurality of MR elements that are aligned in the Y direction along one yoke and connected in series. Each shield has such a shape that its maximum dimension in the Y direction is smaller than its maximum dimension in the X direction.