Bacharach 13-3000 Draftrite Draft Gauge is a pocket size instrument. Conveniently held in one hand when being used, this tester is extremely suitable for heating contractors and service technicians.
The free-floating pointer indicates sudden changes from draft to pressure caused by "puffbacks." Suitable for checking flue pipe, chimney, fire box, smoke hood, smoke pipe draft, draft regulator, oil burner firing rate, and basement ventilation.