please helppppp......!!!

helle every one,

first sorry for my english §§!!!

so i wanna build Sanitizing tunnel to help for virus corona and i wanna use tow ultrasonic
one in tunnel and second out of tunnel so problem is when some one in the operation of santizing is work when finish from santizing and he go out the second ultrasonic it work so...

is ther idea to turn off second ultrason if the first work ????

Please post your code, in code tags.