This is a new device for studying electric fields. For
years the gold-leaf electroscope has been used as the
standard in the study of static electricity. For many
reasons, its use is very limited in studying statics.
The ELECTRON-O-SCOPE™ uses a Field Effect
Transistor (FET) which responds to both positively and
negatively charged objects. The intensity of the LED is
proportional to the amount of charge detected by the
instrument. Positively charged objects brought within
one meter of the probe will cause the LED to glow. Not
only does this instrument pick up the static charge
produced on a glass, plastic, or rubber rod, but also on
the material used to produce the charge. The electric
field produced around a computer monitor or TV set is
easily picked up as well.