Physical quantity detection device
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United States of America Patent
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Issued Date -
Oct 4, 2018
app pub date -
Aug 3, 2016
filing date -
Aug 3, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
The purpose is to enhance the measurement stability of a flow rate detection unit in a physical quantity detection device by branching an auxiliary passage in which the flow rate detection unit is disposed into first to third passages and providing the third flow passage at an upstream part of the second flow passage. A physical quantity detection device has a circuit board provided with at least one detection unit for detecting the physical quantity of a gas flowing through a main passage and a circuit unit for computational processing of the physical quantity detected by the detection unit, a housing for accommodating the circuit board, a cover fixed to the housing, and an auxiliary passage formed by both the housing and cover that is configured to branch passages from a first passage to a third passage.
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