Here is a smart light screen that can protect you against dangerous machines. These Safety Light Curtains emit infrared light, which when blocked sends a signal to stop dangerous equipment. It has a fast response of <20ms. It has finger, palm, and body detection modes.
More gadgets like this: here
The system is useful for woodworking, forging, and other machines. It can also be used as a security device.
**Disclaimer: Our posts may feature aff links. As an Amazon Associate, we earn from qualifying purchases. Please read our disclaimer on how we fund this site.