PM-L44

Series:	PM-44
Packaging:	Bulk
Part Status:	Obsolete
Sensing Distance:	0.197" (5mm)
Sensing Method:	Transmissive
Output Configuration:	NPN - Dark-ON/Light-ON - Selectable
Current - DC Forward (If) (Max):	50mA
Current - Collector (Ic) (Max):	15mA
Voltage - Collector Emitter Breakdown (Max):	30V
Response Time:	20µs
Operating Temperature:	-25°C ~ 55°C
Mounting Type:	Chassis Mount
Package / Case:	Module, Wire Leads, Slot Type
Type:	Unamplified

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Optical Sensors

Photointerrupters - Slot Type - Transistor Output

PM-L44 photointerrupters are a type of optical sensors from Panasonic. They are used for detecting the presence of an object and have become popular in consumer and industrial electronics due to their small size, high sensitivity, and convenient use.

Application Field

PM-L44photointerrupters are widely used in industrial automation, including manufacturing, machinery, automotive, and other consumer electronics applications. In industrial control systems, PM-L44 photointerrupters are used for detecting the presence of objects and convey information to the corresponding control module for further processing. Moreover, they are also commonly used as sensors for mechanical or electrical positioning applications.

Working Principle

The PM-L44 type photointerrupters adopt a dual-element detection system that works by receiving a transmitting light beam from an LED, usually red, and then separate them in two different light paths. Then, depending on the small slots that the box contains, the light beam is cut off, and the photointerrupter operates based on the gap between the slots. When there is no object in the range, the LED emits a light beam that is blocked by the slot walls, which stops the current flow and the photointerrupter will maintain in its idle state. When an object passes between the slots, however, the light beam will be interrupted, and the photointerrupter will output an electric signal. This signal is then received by the control module and used for further processing.

Conclusion

PM-L44 photointerrupters are a type of optical sensor used for detecting the presence of objects and provide reliable and accurate results. They are widely used in manufacturing and other industrial fields due to their small size, high sensitivity, and convenience of use. PM-L44 type photointerrupters works by receiving a transmitting light beam from an LED, then separate them into two different light paths, and finally detect the interruption of the light beam by the slots in order to output an electric signal.

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