https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
QB-50MF Quad Photobeam Detector

QB-50MF Quad Photobeam Detector

YU-HENG ELECTRIC CO., LTD.
Region: Taiwan
Update: 03/20/2007
Key Specifications
Features:

* Quad beams

* Multi-frequency

* Programmed A.G.C.

* Input Volt.: AC/DC 12-24V

* IP-55

* Sensing range (outdoors): 50m/100m/150m/200m/250m

* Laser beam alignment function (optional)

https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions