| 摘要 |
What is described is aflame atmosphere analyser of the type designed for operation with combustible gases of various kinds, comprising a tube (3) in which an intake and air and gas mixing chamber (10) is formed, a first gas supply nozzle (6) and means (11) for supplying primary combustion air opening into said intake chamber(10), and a flame burner (9) in fluid communication with the intake and mixing chamber (10) for supplying an air and gas mixture, formed in the chamber, to the burner. The analyser comprises a second gas supply nozzle(12), which is slidably guided in the tube(3), and actuator means (15)provided on the tube (3) and operable from outside the tube, for moving the second nozzle (12) between an inoperative first position, in which the gas is supplied through the first nozzle(6), and an operational second position, in which the gas is supplied through the second nozzle(12), the first nozzle (6) having no effect on the supply of the gas in the second position. |
