For high school and university physics experiments and research beginners, using the "photoelectric effect" or "Kibble equilibrium" principle, accurately measure the Planck constant h within 30-60 minutes, and verify the basic relationship of quantum theory E=h ν. Integrated photoelectric tube dark box: eliminates environmental light interference, one click drawer replacement. Experimental procedure (example of photoelectric effect method): ① Select wavelength → ② Adjust deceleration voltage to zero photocurrent → ③ Software automatically records cut-off voltage V ₀ → ④ Draw V ₀ - ν graph → ⑤ Multiply slope by electron charge e to obtain h. The entire process takes ≤ 30 minutes and supports multiple sets of data averaging.