What are the models of servo motors with a diameter of about 20----30mm or smaller servo motors? Length below 100Mm. The smaller the better.

E3Z type selection, my device needs to use ten sets of distance 100Mm in turn to check the photoelectric switch, CJ1W-ID232
00Mm, in turn, the photoelectric switch for testing, detection distance is 6M, please ask, this is the use of E3Z-T61A can use it, or need to use E3Z-T62? The main consideration is the interference be

PFXGP4311HTADERK Pro face touch screen gp-4000 and gp-4000M, what is the difference between gp-4000e