https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
QB-50MF/100MF/150MF/200MF Photobeam Sensor

QB-50MF/100MF/150MF/200MF Photobeam Sensor

YU-HENG ELECTRIC CO., LTD.
Region: Taiwan
Update: 05/08/2007
Key Specifications
Features:

*Quad beams

*Multi frequency ( 4 channels selectable)(Optional)

*Programmed A.G.C.

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

*IP-55 ingress protection

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

*Laser beam alignment function (optional)

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