LTH-301A

Series:	--
Packaging:	Bulk
Part Status:	Active
Sensing Distance:	0.205" (5.2mm)
Sensing Method:	Transmissive
Output Configuration:	--
Current - DC Forward (If) (Max):	20mA
Current - Collector (Ic) (Max):	500µA
Voltage - Collector Emitter Breakdown (Max):	30V
Response Time:	3µs, 4µs
Operating Temperature:	-25°C ~ 85°C
Mounting Type:	Through Hole
Package / Case:	Module, PC Pins, Slot Type
Type:	Unamplified

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LTH-301A Application Field and Working Principle Overview

The LTH-301A is an Optical Sensor - Photointerrupter - Slot Type – Transistor Output designed for use in demanding industrial and commercial environments. It is an optocoupler-based photointerrupter designed to detect the presence of an object in an enclosed space, such as a parcel. It consists of a set of picturesensitive components, which, when strategically placed in a dark, closed space, will set off an optocoupler alarm if something is detected.

Design & Construction

The LTH-301A is designed around a high-quality optocoupler. The top layer of the unit is composed of a plastic housing with a few external contacts that allows the user to adjust its sensitivity and set the output type. Atop this housing is an infrared LED and a photo diode. The LED generates an infrared light beam which is directed at the photo diode and shines through the slot or opening in the housing. When an object is placed in the slot, it interrupts the beam of light, and the photo diode senses this interruption. The electrical signal generated from this interruption is processed by the optocoupler and triggers the alarm.The optocoupler uses a light-emitting diode (LED) and a photodiode as its two main components. The LED emits a light beam which is detected by the photodiode. When the light beam is disrupted, the photodiode receives a signal and sends it to the opto-coupler’s control circuit. The control circuit then interprets the signal and determines whether the alarm should be triggered.

Working Principle

The working principle of a LTH-301A is that when an object is placed in the slot, the interrupt the LED-photodiode circuit where the signal is sent to a control circuit. This control circuit then interprets the signal and decides to trigger the alarm.The optocoupler’s LED-photodiode circuit converts the light into an electrical current which is further amplified before being sent to the control circuit. Upon receiving the signal, the control circuit processes the amplified signal and generates a high-voltage output to trigger the alarm.

Advantages

The LTH-301A offers a variety of advantages for commercial and industrial use. First, it is constructed using a plastic housing with external contacts, allowing users to adjust the sensitivity and set the output type. This allows the LTH-301A to be adapted to different types of applications.Second, the device is designed to be extremely sensitive, meaning it can detect a very small interruption in the light beam. It is sensitive enough to differentiate between an object and a reflection or a shadow, ensuring reliable operation even in low-light environments.Third, the device is highly reliable and can last for many years. The LED and photo diode used in the design are long lasting and require minimal maintenance.Finally, the LTH-301A is relatively inexpensive and easy to install. Due to its low cost, it can be used in many applications without a significant financial outlay.

Conclusion

The LTH-301A is an Optical Sensor - Photointerrupter - Slot Type – Transistor Output designed for commercial and industrial use. It is composed of a plastic housing with a few external contacts that allows the user to adjust the sensitivity and set the output type. It consists of a set of picturesensitive components, which when strategically placed in a dark, closed space, will set off an optocoupler alarm if something is detected. The device is designed to be highly sensitive, reliable, and long lasting, making it a great choice for a variety of applications.

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