How to detect the photosensitive resistor?

Last Update Time: 2019-01-09 11:00:22

A photoresistor is a type of special resistor that changes resistance with light.


Detection method of the photosensitive resistor:


1). Use a piece of black paper to cover the transmittance window of the photosensitive resistor. At this time, the pointer of the multimeter basically stays unchanged, and the resistance is close to infinity. The greater the value, the better the performance of light resistor. If the value is small or close to zero, it means that the photosensitive resistor has been burned and damaged and can no longer be used.

 

2). When a light source is aligned with the transmittance window of the photosensitive resistor, the pointer of the multimeter should be swung to a greater extent, and the resistance value is obviously reduced. This value is better than the novel photosensitive resistor. If this value is large or even infinite, it indicates that the open circuit damage of the photosensitive resistor can not continue to be used.

 

3). The transmittance window of the photosensitive resistor is directed to the  light, and a small black paper is used to shake the upper part of the shade window of the photosensitive resistor to make it discontinuous. At this time, the multimeter pointer should swing with the sloshing of the black paper. If the pointer of the multimeter stays at a certain position, it does not oscillate with the sloshing of the paper, indicating that the photosensitive material of the photosensitive resistor has been damaged.

 

This article is from Allicdata Electronic.