By using with Micro Current Sensor; Hold high-sensitivity coils and rotate, the induced current produced by cutting geomagnetic field lines can be measured with the micro current Sensor.

llongwill^® data logger, llongwill^® general power supply, solenoid, magnetic induction sensor, wires, etc. 

A.Base; B.Vertical Track; C.The Horizontal magnet field direction from the rectangular magnet; D.Coils; E.Thin wire; F.Build-in voltage Sensor; G.Light Blocking Sheet; H.Photo Gate Sensor; I.Data Logger Circuits ; J.USB Port