| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a system for specifying a kind of a gas. SOLUTION: The system comprises a first sensor which comes into contact with the gas so as to generate a first electrical output signal indicating a first state of the gas. In the same manner, also a second sensor comes into contact with the gas so as to generate a second electrical output signal indicating a second state of the gas. A processor receives the output signals from the first and second sensors as input signals, and it decides the kind of the gas by a calculation or by a reference table stored in a memory readable by the processor. The first and second states of the gas are selected from a temperature, a mass flow rate and a group of the temperature and a pressure. COPYRIGHT: (C)2003,JPO
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