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Firgelli Robots Photoelectric sensor - PS55XX series

Photoelectric Sensor - PS55XX series


Photoelectric sensor - PS55XX series


The cadmium sulfide (CdS) or light dependent resistor (LDR) whose resistance is inversely dependent on the amount of light falling on it, is known by many names including the photo resistor, photoresistor, photoconductor, photoconductive cell, or simply the photocell.

A typical structure for a photoresistor uses an active semiconductor layer that is deposited on an insulating substrate. The semiconductor is normally lightly doped to enable it to have the required level of conductivity. Contacts are then placed either side of the exposed area. The photo-resistor, CdS, or LDR finds many uses as a low cost photo sensitive element and was used for many years in photographic light meters as well as in other applications such as smoke, flame and burglar detectors, card readers and lighting controls for street lamps.

Designated the PGM Series, the photoresistors are available in 5mm, 12mm and 20mm sizes, the conformally epoxy or hermetical package offer high quality performance for applications that require quick response and good characteristic of spectrum.


- Photoswitch
- Photoelectric Control
- Auto Flash for Camera
- Electronic Toys, Industrial Control

Model No. Max. VDC Max.Watt Temperature Peak Value Resistance r Responding Time
Light(K ohm) Dark(M ohm) 100/10 increase decrease
PGM5516 150 90 (-)30 to 70 540 5~10 0.6 0.5 30 30
PGM5528 150 100 (-)30 to 70 540 10~30 2 0.6 30 30
PGM5539 150 100 (-)30 to 70 540 30~50 3 0.7 30 30
PGM5506 150 100 (-)30 to 70 540 4~7 0.5 0.5 30 30

 Click to View Data Sheet

0.2 lb

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