1. Verify the existence of positive and negative electrical charges
2. Verify the quantum nature of electrical charges
3. Measure the elementary charge of an electron
4. Observe and measure Brownian motion (optional)
5. Verify normal distribution of displacement probability (optional)
Specifications| Description | Specifications |
| Operating voltage between upper and lower plates | DC ± 0 ~ 700 V, adjustable, 3-1/2 digit, resolution 1 V |
| Elevation voltage | 200 ~ 300 V |
| Distance between upper and lower plates | 5 ± 0.01 mm |
| Magnification of objective lens | 60X and 120X |
| Electric timer | 0 ~ 99.99 s, resolution 0.01 s |
| Electronic graduation of scale | Type A: 8×3 grid, 0.25 mm/div with 60X objective |
| Type B: 15×15 grid, 0.08 mm/div with 60X objective& 0.04 mm/div with 120X objective |
| Description | Qty |
| Main unit | 1 |
| Oil sprayer | 1 |
| Bottle of oil (30 mL) | 1 |
| LCD monitor (8-inch) | 1 |
| 120X objective lens | 1 |
| Power cord | 1 |