PM-L25-P

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Optical Sensors are used to detect and measure properties such as distance, color, presence, size, or shape of objects, by using light. Photointerrupters are a type of optical sensor consisting of an emitting source and a receiver which are placed either on opposite sides of a gap or slot or at the same side of it in a parallel arrangement in order to detect objects passing through the gap or slot. Slot Type Photointerrupters with Logic Output (PM-L25-P) are used as switching elements for low and medium-speed operations in electronic circuits.

The PM-L25-P consists of an infrared light emitting diode (LED) and a phototransistor in a single unit. The LED is mounted on a stainless steel header which also contains the mounting holes. A slot is created between the LED and the phototransistor which is used for sensing the object which is passing through the slot. The LED emits light which is focused on the slot and any objects entering the slot interrupts the light beam causing the phototransistor to turn off. When the object is removed from the slot, the light beam is restored and the phototransistor turns on.

The PM-L25-P has a number of applications in light detection and switching. It can be used in a variety of applications such as switch controls, distance sensors, temperature sensors, vibration sensors, automatic door openers, and other objects detecting applications. Additionally, the PM-L25-P is commonly used in robotics for sensing the presence of the robotic arm when it reaches its target. It is also used to detect the presence and orientation of objects in conveyor systems.

The working principle of the PM-L25-P is based on the principle of light interruption by an object which passes through the slot created between the LED and the phototransistor. When an object passes through the slot, it interrupts the light beam, causing the phototransistor to turn off. When the object is removed from the slot, the light beam is restored and the phototransistor turns on. The switching operation of the phototransistor is based on this principle.

The PM-L25-P has an integrated logic output which is used to drive the switching elements in the circuit. It works according to the control signals generated by the phototransistor. When the light is blocked by an object, the phototransistor turns off and the logic output goes low. When the light is restored, the phototransistor turns on and the logic output goes high. This output is used to control other components in the circuit such as relay switching elements, signal processors, and other devices.

The PM-L25-P is a reliable and cost effective solution for various light detection and switching applications. It is easy to install and has a long operational life. It is also a robust device that can withstand harsh environmental conditions. Additionally, the PM-L25-P has a wide operating range and is insensitive to vibration, dust, and moisture. Thus, making it ideal for use in various industrial, automotive, and consumer applications.

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