With this instrument, even the slightest air movements become visible. Flow-Check is ideal for checking ventilation or air conditioning systems, chimneys, smoke detectors and detecting leaks in industrical equipment. Flow-Check air current tester produces clouds of smoke that are adapted to the specific weight of air. These harmless clouds of smoke float freely and are carried away by the slightest air currents.
This handy devide can be safely applied wherever necessary.