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4mm Dia CdS Photoconductive Photocell Photoresistor Light Sensor 540nm For Camera Exposure

4mm Dia CdS Photoconductive Photocell Photoresistor Light Sensor 540nm For Camera Exposure

Brand Name:Ao littel
Model Number:GM45
Minimum Order Quantity:1000 Pieces
Delivery Time:7-10 Working Days
Payment Terms:T/T, Western Union
Place of Origin:CHINA
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Location: Dongguan Guangdong China
Address: NO.27,Jinlanling Street,Taigongling Village Dongguan 523829,Guangdong,China
Supplier`s last login times: within 35 hours
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Product Details

4mm Dia CdS Photoconductive Photocell Photoresistor Light Sensor 540nm For Camera Exposure


Typical Applications


PhotometryFor Exposure Meters
Programmed electronic shutter
Auto-exposure circuit
General-purpose illuminometer
For Low exposure alarm
Low-light-level detection
Counterlight level detection
White-balance control for video camera

Light Control
For light Dimmers
For Automatic Light switch
Street lamp, doorway lamp, garden lamp
Beacon nighttime automobile
Headlight
DetectionPaper and card reading
For heating systems
Flame monitor for oil burner
Electronic toy such as beam gun
Intruder alarm, security system
AudioNon-contact volume control
For Melody Toys, card, tea cup, etc.
Auto-return system for turntable
Modulation circuit

Description


Cadmium Sulfoselenide (CdS) sensors are low cost photoconductive devices for visible light measurement. Their resistance decreases as the light level increases with efficiency characteristics similar to the human eye.


The GM45 Series are (CdS), Photoconductive photocells designed to sense light from 400 to 700 nm. These light dependent resistors are available in a wide range of resistance values. They’re packaged in a two leaded plastic-coated ceramic header.



Specification


NameModel

Max. Voltage

VDC

Max. Power

mw

Environment Temperature (℃)

Spectrum Peak nm

Light Resistance (10Lux)

KΩ

Dark Resistance

≥MΩ

γ100

10

Response Time

(ms)

IncreaseDecrease

φ4

Series

GM450615050-30~+705402-50.10.53030
GM451615050-30~+705405-100.20.53030
GM452815050-30~+7054010-2010.63030
GM4537-115050-30~+7054020-3020.63030
GM4537-215050-30~+7054030-5030.73030
GM453915050-30~+7054050-10050.83030
GM454915050-30~+70540100-200100.93030

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Features


Visible light response
Sintered construction
Low cost


Application Example


Input Boards LDR:

This is a ORP13, 4mm light dependent resistor
Fully covered resistance of 10kΩ
In normal room conditions it has a resistance of approximately 250Ω.


Design Considerations


Photoresistors are less light-sensitive devices than photodiodes or phototransistors: the two latter components are true semiconductor devices, while a photoresistor is a passive component and does not have a PN-junction. The photoresistivity of any photoresistor may vary widely depending on ambient temperature, making them unsuitable for applications requiring precise measurement of or sensitivity to light photons.

Photoresistors also exhibit a certain degree of latency between exposure to light and the subsequent decrease in resistance, usually around 10 milliseconds. The lag time when going from lit to dark environments is even greater, often as long as one second. This property makes them unsuitable for sensing rapidly flashing lights, but is sometimes used to smooth the response of audio signal compression.

China 4mm Dia CdS Photoconductive Photocell Photoresistor Light Sensor 540nm For Camera Exposure supplier

4mm Dia CdS Photoconductive Photocell Photoresistor Light Sensor 540nm For Camera Exposure

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