incorporate 3 SmartSens magneto-inductive sensors and PNI's 11096 ASIC controller on a single PCB.

Features 

Complete 3-axis magnetometer draws < 500 µA at 3 VDC. Operation :3 VDC. Part size: 25.4 x 25.4 x 19 mm. Field measurement range ±1100 µT (±11 Gauss) Resolution as low as 0.015 µT (0.00015 Gauss) All digital solution, no additional circuitry is required. SPI protocol for interfacing to a processor. Optional CarrierBoard available for easy prototyping and evaluation. 

Applications 

Handheld battery-powered devices with built-in compass feature. High-performance magnetic field sensing. High-performance solid state navigation equipment for automotive, marine, and aeronautic applications. Direction-finding features for any device where bearing or attitude indicators have value.

PNI MicroMag3 triaxial magnetometer