https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
SED-0204 Screw Type Magnetic Reed Switch

SED-0204 Screw Type Magnetic Reed Switch

SHINCLUSTER ELECTRONICS CO., LTD.
Region: Taiwan
Update: 11/06/2008
Key Specifications
This sensor is applied to protect user''s life environment and security transmitter.

Features:

1.Aesthetic appearance, flexible installation.

2.Compact elements which can speed up alarm motion.

3.Special design of longer detection range which can efficiently preven.

4.Able to save equipment cost by parallel connection.

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