One of my favourite cartoons when I was a kid was a picture of a bloke in a uniform wearing the logo of the Gas Company, with a notepad and pen in his hands and looking exhausted. Someone says to him “You look tired” and he replies “So would you be if you’d just done 100 meters”.
Funny eh? Peter doesn’t want to have to wait until his gas supplier tells him how much gas he has used, he wants to know instantly the effect of having that hot bath. You can find out how he is using Gadgeteer to read meters safely by reading this.