Just wondered if anyone has a pulse oximeter they use at home for asthmatic children?

Our pharmacist said it's a good way to track how they are at home if your not sure whether to give ventolin or not. I just wondered what the normal reading is for a child (2-6 years)? I will check with our GP but couldn't get an appointment until next week.

I have two asthmatic children and one of them is at 95% and the other at 93-94% at the moment. Just curious as to if anyone knows if this is average?