They sell special for automation, but I also tell you that it is nonsense because I have one that is for electronic use in general for PC and things of those and works the same 150 euros it costs me and carries to reduce and expand the graph the freezing image, Conesion to a PC monitor and see everything recorded with a program that inclines.
Idea that I give you look at a diagnostic machine with oscilloscope and save money 2 in 1.