发明名称 Thermal Type Gas Flowmeter
摘要 A thermal type gas flowmeter comprising a sensor element which, in turn, comprises at least one first heating resistor, two or more resistors in fluid and a second heating resistor which is disposed between the first heating resistor and a housing supporting the sensor element. The first and second heating resistors are electrically independent from each other. A temperature sensing unit is provided between the first and second heating resistors. A temperature of the first or second heating resistor is controlled by a temperature sensed by the temperature sensing unit.
申请公布号 US2008047340(A1) 申请公布日期 2008.02.28
申请号 US20070829443 申请日期 2007.07.27
申请人 HITACHI, LTD. 发明人 TOKUYASU NOBORU;HOSHIKA HIROAKI;KASHIO KAORI;OSAKA MITUHARU;OHTSUKI TOSHIKI;SUKEGAWA YOSHIHIRO
分类号 G01F1/688 主分类号 G01F1/688
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