Classic apparatus to measure the fundamental unit of electric charge (e).

• Transparent chamber for clear observation
• Adjustable electric field strength
• Microscope for precise droplet tracking
• Source of ionized air for charging oil droplets

Make precise measurements of the elementary charge (e) using Millikan's classic apparatus. This compact, portable instrument Is made of three main parts: an oil drop chamber, a microscope, and a power supply. Students can observe the charged droplets as they travel across the microscope's field of view. By adjusting the voltage across the interior plates, the charge/mass ratio may be easily calculated. Discover quantized charge for yourself.