You want to buy some INCENSE and light a piece. Put it in your stove's
oven along with your detector.

(DON'T turn the oven on - DUH!)

A digital meter should definitely reflect a substantial peak after a few
minutes.

I'm not sure whether a "go-no-go" detector would trip but I suspect it
would.

If you can't find incense, put a few lite cigaretes in.