Compass and Magnetic Field Module sensors are devices designed to detect and respond to the presence of a magnetic field. Items in this family are designed for dead reckoning, digital compass, or a digital magnetometer in the X, Y, Z axis. They are used for measuring heading, pitch and roll, and strength or direction with a measuring range of ±0.9 gauss, ±1 gauss, ±180μT, ±2 gauss, or ±700 mgauss.