Magnetic sensor
Magnetoelectronics is a growing field that is devoted to the development of electronic device structures that incorporate a ferromagnetic element. Magnetic sensors or magnetometers are widely used to sense magnetic fields. Such devices typically operate to transform the sensed magnetomotive force to an electrical signal for processing. Magnetic sensors employ a magnetoresistive effect element as a magnetic field detection element. Semiconductor magnetic sensors which are sensitive to magnetic fields can be quite useful in military, aviation, maritime, and scientific laboratory applications. The magnetic sensor is used primarily as a magnetic head for a hard disk drive serving as a recording device in a computer. One well known type of sensor for reproduction heads is the magneto-resistive (MR) sensor employing the magneto-resistive effect. The magnetoresistive sensor is of two types: an anisotropic magneto-resistive (AMR) film employing an anisotropic magnetoresistive effect, and a giant magnetoresistive (GMR) film which is a multilayered structure. The anisotropic magnetoresistive effect is a phenomena that an electric resistance changes by some percentages corresponding to magnetized states of a magnetic substance. However, anisotropic magneto-resistive (AMR) magnetic heads can have some percentage changes in the reading signals, and magnetic sensors having reading output changes of higher percentages. As such magnetic sensors are proposed giant magnetoresistive (GMR) effect magnetic sensors using giant magnetoresistive effect, ferromagnetic tunnel junction magnetic sensor using ferromagnetic tunnel junction. Magnetic sensors utilizing giant magnetoresistance (GMR) effects have utility as magnetic sensors, especially in magnetoresistive read heads used in magnetic disc storage systems. Magnetic sensors utilizing the GMR effect are frequently referred to as "spin valve" sensors.
Magnetic sensor product listings
A new series of patented ferromagnetic proximity switches that operate in the presence of a ferrous metal, rather than requiring actuating magnets, is being introduced by MEDER electronic. MEDER MK02 Series Ferromagnetic Metal Detection sensors are single component devices, which sense magnetically conductive materials directly without the need for two separate magnet and sensing elements.
MICRO MACHINED SENSOR NEEDS NO POWER A new, ultra-small magnetically actuated reed sensor that requires no power and is designed for switching CMOS gates and other low power devices such as implantable medical pacemakers and insulin pumps is being introduced by MEDER electronic. MEDER MMS Reed Sensors are magnetically actuated on/off sensors that feature no power draw and measure only 2.8mm x 2.Omm sq. (0.110" x 0.08").
MK02 Ferromagnetic Proximity Sensor
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