burner

Bunsen burners and Teclu burners are small gas burners in which the combustion gas partly draws in the combustion air itself according to the principle of a jet pump. Both variants are frequently used in chemical laboratories for heating material samples or liquids or for flaming. A grid or fine holes at the upper end of the burner prevent the flame from flashing back into the burner in modern burners. The burner is usually operated with propane, butane or town/natural gas.