| 摘要 |
<p>A probe (1) comprises a gas supply pipe closed at its lower end by a stopper (40) melting in the liquid metal, a gas collecting portion (14) for collecting the gas bubbling from the supply pipe through the metal, which portion is provided with a diaphragm (14) allowing gas to pass but retaining liquid metal, and a gas discharge pipe connecting to the gas collecting portion (14). A gas circuit (2) connects with one end to the gas supply pipe and with its other end to the gas discharge pipe. A gas detector (5) and a pump (6) are mounted in this circuit (2). A lance (11) through which the gas circuit (2) extends, contains the one portion (10) of a quick-acting coupling (9, 10) with two connectable portions (9 and 10), while the probe (1) contains the other portion (9) of the coupling (9, 10). Before measuring, the gas circulating in the circuit is dried.</p> |
