This is a demo application of AMI's Nano Tesla Sensor(MI-CB-1DJ USB Type) which can detect ultra-small AC magnetic field like 1nT(=1/50,000 of geomagnetism).
All you have to do is connect the sensor to a USB Mini-B cable and then connect to a USB-OTG(On-The-Go) adapter/cable and plug into your tablet. The application detects the sensor if you already installed it. This application has been designed and tested using Nexus 7(both 2012 and 2013 models). But It could work on any tablet with USB-OTG capability under Android 4.0 or later.
If you are interested in evaluating the sensor or have any questions, please contact to Aichi Micro Intelligent Corporation([email protected]