Field Detector (Ion, Electrical Field, Lightning, and Paranormal Disturbance Detector)
Provides a low-cost method of detecting selectable electrical fields. This device detects both positive and negative electrical fields produced by ions, ultralow static fields, lightning, and other associated phenomena.
No real hazards exist, with the exception of using this device during electrical storms or around other high-voltage sources (and this is just the physical hazard of holding a metal object under these conditions). Eye protection should be worn when making and testing this device.
Requires intermediate skills ...