Honeywell Microelectronics & Precision Sensors is a leading provider of dedicated integrated circuits for aerospace and military markets, and also manufactures sensors and electronics for a variety of commercial applications. Honeywell magnetoresistive (MR) sensors are the most sensitive low field solid state magnetic sensors on the market and can be used to measure magnetic field directions and sizes from 70 mG (7 nT) to 6 G (0.6 mT). Honeywell's magnetoresistive sensors can determine the changes in the earth's magnetic field due to the presence of ferromagnetic objects, or the position of ferromagnetic objects in the earth's magnetic field. High speed vehicles and other iron objects can be detected by using high bandwidth. These sensors employ non-contact design, and the operating distance depends on the measured ferromagnetic mass.