Carbon film resistance identification

1. Direct marking method: the resistance  is marked on the resistor surface with Numbers and unit symbols. The allowable deviation is directly revealed by percentage.

2. Literal symbol method: the nominal resistance is revealed by a regular combination of Arabic numerals and literal symbols, and the allowable deviation is also revealed by literal symbols. The number before the symbol reveals the integer resistance , and the number after it reveals the first decimal resistance  and the second decimal resistance  in sequence.

3. Color standard method: mark the nominal resistance and allowable deviation on the appearance of the resistor with bands or points of different colors. The color standard method is widely used in foreign countries.