Safetimeter stop time meter used to measure the reaction time of machine safety devices.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...e_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...ety_device.jpg
Previously:
https://www.homemadetools.net/forum/...204#post169050
https://www.homemadetools.net/forum/...590#post128304
https://www.homemadetools.net/forum/...928#post167894
https://www.homemadetools.net/forum/...295#post161568
https://www.homemadetools.net/forum/...839#post100171
