https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
Multidirectional Vibration Fence Sensor: SL-3

Multidirectional Vibration Fence Sensor: SL-3

Rbtec
Region: United States of America
Update: 08/23/2011
Key Specifications

*Operating temperatures -45 to +70
*Operating voltage and currents 12V; 35mA
*Internal contact 10 contact points, improved gold plating with self cleaning capability.

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