I would like to record the switch door time, is there any such a recorder?

Only need to record the time to open the door on the line, do not need to see the process

And then the signal connected to the recorder on the line. Close to the switch a few tens of dollars, two or two thousand instruments. Is it necessary to do it?

And then the signal connected to the recorder on the line. Close to the switch a few tens of dollars, two or two thousand instruments. Is it necessary to do it?

In the door to install a proximity switch, so the door will open a switch signal output.