SF4-AH8-H

Optical Sensors - Photointerrupters - Slot Type - Logic Output

The SF4-AH8-H is an optical photointerrupter slot type packaged logic output sensor that is used for a wide range of applications. It is designed to detect the presence or absence of objects, and provide a logic output signal with a high signal-to-noise ratio.

Photointerrupters are optical devices, mounted on a printed circuit board, that transmit and receive light through a gap in size ranging from a few millimeters to several mm. When an object passes across the gap, the sensor detects the interruption of the light and produces a signal. There are two variants of Photointerrupters, one referred to as "slot-type" which is enclosed within an opaque case whereas the other type is referred to as "transmissive" which light is transmitted through the photodetector, which has no opaque protection.

The SF4-AH8-H is a slot-type device and its working principle involves the detection of non-contact objects passing within the gap between its two optical parts. It consists of an infrared light-emitting diode (LED) and an NPN silicon photodetector. It is designed to detect objects of very small size, up to a few millimeters, making it ideal for tilt sensing. The LED emits infrared light while the photodetector calibrates this intensity. Both parts are housed in an opaque black case that prevents any outside light from affecting the burst of energy.

When an object passes through the gap between the LED and photodetector, the amount of light received by the photodetector is blocked which leads to a change in the electrical characteristics of the circuit. This change is then detected by the logic output of the SF4-AH8-H providing signal information. The logic output has two distinct states, ON and OFF, and depending on the nature of application, the output can be inverted.

SF4-AH8-H has a wide range of applications in areas such as robotics and automated production processes as it offers reliable and accurate detection of objects and can be used to detect the presence of a switch, safety guard, led, mark reading head, label change, detect conveyor speed, etc. With its capabilities and design, it can accurately detect the target objects even when the intensity and depth of the object changes. Additionally, its slim design makes it suitable for mounting in tight spaces.

In conclusion, the SF4-AH8-H is an example of an optical photointerrupter slot type packaged logic output sensor that can be used for a wide variety of applications ranging from detecting the presence of a switch, sensing safety guards to detecting the conveyor speed. Its slim design and wide range of operating parameters make it suitable for sensor operations in tight spaces. It is able to accurately detect objects even when the intensity and depth of the object changes.