Gas sensor with flashback barrier
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United States of America Patent
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-
Mar 20, 2001
Grant Date -
N/A
app pub date -
Dec 23, 1998
filing date -
Jul 10, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An explosion-proof gas sensor (1) with a flashback barrier (2) permeable to the gas to be measured between the measuring space (4) and the environment in an otherwise gas-impermeable housing (3) is described. The sensor provides reduced response time and higher signal sensitivity for the gas to be measured. A flashback barrier (2) is provided including a plurality of flexurally rigid fabric layers made preferably of metal, which are permeable to the gas to be measured, with an overall thickness of one to ten mm, an overall porosity of at least twenty percent by volume relative to the volume of the flashback barrier (2), and with a maximum number of one percent of all pores with a pore size larger than 240 .mu.m.
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