Main parameters and characteristics 1) According to the spectral characteristics of three photoresistor photoresistor: UV light-sensitive resistors, infrared light-sensitive resistors, Visible photoresistor; 2) the main parameters are as follows: A - Dark Current & Dark Resistance: photoresistor at a certain applied voltage, when no light irradiation, when flowing Current is called dark current. Applied voltage and the dark current ratio is called dark resistance; B - Sensitivity: Sensitivity refers to the resistance value of the photoresistor from light irradiation (dark resistance) when irradiated with light and the Resistance (light resistance) of the relative change value; C - Voltage Characteristic Curve. Volt-ampere characteristic curve used to describe the relationship between the applied voltage and the photoresistor photocurrent, of The photosensitive device, its photocurrent increases with the applied voltage. D - Temperature Coefficient. Photoelectric effect photoresistor influenced by temperature, partial photoresistor optoelectronic at low temperatures Higher sensitivity, whereas the sensitivity at high temperatures are lower. E -Power Rating. Refers to the rated power for a certain line photoresistor allowed power consumed, when the temperature rise High, its power consumption is reduced.
