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HOA6971-N55 Application Field and Working Principle

Optical Sensors are devices that detect light in order to monitor the environment, measure temperature, adjust speed, detect position, and other physiological parameters for automation control, safety, and security. The Photointerrupters are small and economical sensors used to detect the presence or absence of an object. The Slot Type Photointerrupters detect objects passing through a slot. The most common type of Photointerrupter is the Logic Output which produces a logic-level signal indicating either “no object” or “object present”.

The HOA6971-N55 slot type photointerrupter belongs to the Logic Output Photointerrupters. It features a vertical slot, an active switch, and a logic output, all in one package. The device has an active switch, LED, and a phototransistor in a through-hole package 4mm in height. The slot is 0.2mm wide and is 8mm in length. The LED and the phototransistor are separated by a shielding plate which increases the switching distance and provides a efficient optical barrier.

The HOA6971-N55 has a range of applications in access control, motion sensing, home automation, industrial automation, medical, and automotive industry, etc. Its working principle is straightforward; the presence of any object in the slot between the LED and the phototransistor will cause a change in the state of the logic output. When the object is present, the logic output will be ON, indicating an object present status; an absence of the object will cause the logic output to be OFF, indicating an object absent status.

The HOA6971-N55 features a wide operating voltage range of 4.5V to 24V, with a wide operating temperature range of -25°C to +85°C. It is also RoHS compliant and offered in through-hole mounting for optimal heat transfer and ease of use. The high coupling efficiency of the LED and the phototransistor, together with the low power LED operation and low power phototransistor operation, makes it the perfect choice for various consumer and industrial application fields.

The HOA6971-N55 optical slot type photointerrupter is a low cost and reliable way to sense the presence or absence of an object. The device can be used to detect the position of objects for automation control, safety, and security. With its wide operating voltage and temperature range, it is the perfect solution for applications in the industrial, automotive, medical, home automation and other fields.

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