This inexpensive device detects and estimates charges.

• Ideal for a Variety of Experimental Situations
• Simple System for Teaching and Observing a Complex Phenomenon
• Pyrex Flask
• Nickel-Plated Rod
• Rubber Stopper

The knob on top of the stopper accepts a charge. When the charge enters the flask, the aluminum leaves separate. The size of the charge affects how much the leaves separate.

The electroscope consists of a 250 mL Pyrex flask with a nickel-plated rod, which is attached to a rubber stopper.