Main parameters < p> < / p> < p> 1)
Light resistance (
: the point at which the photoresistor by light irradiation resistance.
< / p> < p> 2)
Dark resistance (
: refers to the photosensitive resistor in the light irradiation,
The dark environment)
At the time of the resistance value.
< / p> < p> 3)
Maximum working voltage (
: refers to the photosensitive resistor under the rated power is allowed to withstand the highest voltage < / p> < p> 4)
Light current: refers to the photosensitive resistor under the provisions of the applied voltage is light through by the current.
< / p> < p> 5)
Dark current (
: refers to the light irradiation, the photosensitive resistor under the provisions of the applied voltage by the current.
< / p> < p> 6)
The time constant (
: refers to the photoresistor light current from the light jump to the stable of 63% when the time required.
< / p> < p> 7)
Temperature coefficient of resistance: refers to the photosensitive resistor in the environmental temperature change 1 ℃, the relative change of electrical resistance.
< / p> < p> 8)
Sensitivity: refers to the photosensitive resistor when light and light irradiation resistance relative changes.
Classification of < / p> < p> < / p> < p> according to the material classification < / p> < p> used in the manufacture of photosensitive resistance material and is mainly metal sulphide selenide and telluride semiconductors.
Usually the methods of coating, spraying, sintering on the insulating substrate made very thin photosensitive resistance body and comb ohmic electrodes, and then pick out lead, encapsulated in a transparent lens of the seal housing, so as not to affect the sensitivity of be affected with damp be affected with damp.
According to the materials of photosensitive resistance can be divided into polycrystalline and single crystal silicon photosensitive resistor, also can be divided into cadmium sulfide (
, cadmium selenide (
, lead sulfide (
, pbse (
, indium antimonide (
Photosensitive resistor, etc.
< / p> < p> according to the spectral characteristics classification < / p> < p> uv photosensitive resistor: are sensitive to uv light, including cadmium sulfide, cadmium selenide photosensitive resistor, etc. , to detect ultraviolet light.
Infrared photosensitive resistor: main lead sulfide, lead telluride, pbse.
Indium antimonide photosensitive resistor, such as widely used in missile guidance, astronomical detection and non-contact measurement, the human body lesion, infrared spectrum, and infrared communication, such as national defense, scientific research and industrial and agricultural production.
Visible light dependent resistor: include selenium, cadmium sulphide selenide cadmium, cadmium telluride, gallium arsenide, silicon, germanium, zinc sulfide photosensitive resistor, etc.
Is mainly used for all kinds of photoelectric control system, such as photoelectric automatic switch portal, will destroy, street lamps and other lighting system of automatic light, automatic feed water and automatic water supply device, the automatic protection device on the machine and position of detector, the thickness of the thin parts detector, automatic camera exposure device, photoelectric counter, smoke alarm, photoelectric tracking system, etc.
< / p> < p> chaozhou li electrical appliance factory specializing in the production of light a night light
, temperature and humidity meter, LED rechargeable small desk lamp.
< / p> < p> < / p> article source: li 3 c electric light a night light ea -
com/ < p> < / p> < p> < / p>
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