You have an Ex h certified pump. Level of Ex safety can only be achieved with installation of additional Ex certified temperature sensor. This is the Ex h – altogether.
Ex certified temperature sensor is not part of package. You shall purchase it separately. You do purchase it. Do you list it in your register separately? Or only as Ex h?
You have the same setup. You do an Ex inspection. You find Ex temperature sensor faulty.
Outcome failed for whole Ex h certified pump or only Ex i certified temperature sensor (which is under Ex h)? Ex Certificate is only about Ex h.
Keep up good work!