Humidity control apparatus for electrochemical sensors
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01N-027/407
G01N-027/406
출원번호
US-0872392
(2007-10-15)
등록번호
US-8741120
(2014-06-03)
발명자
/ 주소
Chapples, John
Willett, Martin
출원인 / 주소
Life Safety Distribution AG
대리인 / 주소
Husch Blackwell LLP
인용정보
피인용 횟수 :
0인용 특허 :
5
초록▼
Devices and methods are disclosed that can adjust a hydration level in an electrochemical sensor or an instrument which includes such a sensor. The device can include a chamber which can, at least in part, surround an inflow port of the sensor. An adjacent reservoir of water can provide a source of
Devices and methods are disclosed that can adjust a hydration level in an electrochemical sensor or an instrument which includes such a sensor. The device can include a chamber which can, at least in part, surround an inflow port of the sensor. An adjacent reservoir of water can provide a source of water vapor which can be infused into the sensor.
대표청구항▼
1. A humidity control apparatus comprising: a gas detector with a front panel and an electrochemical sensor containing an electrolyte of a first hydration level,the front panel having a cylindrically extending portion, the electrochemical sensor is carried within the cylindrically extending portion;
1. A humidity control apparatus comprising: a gas detector with a front panel and an electrochemical sensor containing an electrolyte of a first hydration level,the front panel having a cylindrically extending portion, the electrochemical sensor is carried within the cylindrically extending portion;a housing with a protruding member which defines, at least in part, an interior region and, a second closed region, the detector positioned with the cylindrically extending portion and electrochemical sensor extending into the interior region of the housing which in part surrounds an inflow port of the gas detector, the detector's front panel and protruding member providing a seal against the external environment;a vapor permeable membrane between at least a portion of the two regions;a salt solution carried within the second region; and a heating element carried adjacent to the second region that operates to carry out one of hydrating and dehydrating of the electrolyte of the electrochemical sensor, wherein the detector's front panel and the protruding member form a sealed chamber around the two regions in which a relative humidity is controlled in a fixed or dynamic fashion so as to restore a concentration of the electrolyte within the electrochemical sensor to the first hydration level and wherein a relative humidity in the sealed chamber is controlled by varying the temperature of the salt solution via the heating element. 2. An apparatus as in claim 1 where portions of the interior region carry an externally accessible deformable seal. 3. An apparatus as in claim 1 where the housing includes a side wall that, at least in part, bounds the interior region. 4. An apparatus as in claim 3 where the side wall includes a peripheral surface, adjacent to part of the interior region, the peripheral surface having a closed cross-section. 5. An apparatus as in claim 4 where the closed cross-section is one of at least partly curved, or, partly linear. 6. An apparatus as in claim 5 where the membrane is oriented so as to be substantially parallel to a plane that includes the cross-section. 7. An apparatus as in claim 5 where the side wall extends generally parallel to a line normal to at least a portion of the membrane. 8. An apparatus as in claim 7 where the side wall has first and second ends with one end terminating adjacent to the membrane, and the other displaced therefrom in a direction along the line normal thereto. 9. An apparatus as in claim 8 which includes at least one of an electrical connector for the heating element, and, a fill port for the second region. 10. An apparatus as in claim 9 where the interior region of the housing substantially encloses a selected gas detecting member. 11. An apparatus as in claim 1 wherein the housing further comprises a jacket containing a hydrating solution. 12. An apparatus comprising: a gas detector with a front panel and an electrochemical sensor containing an electrolyte of a first hydration level carried by the front panel;a jacket containing a hydrating solution the jacket having a protruding member which surrounds an inflow port of the gas detector, the protruding member defines, at least in part, an interior region and, a second closed region containing the hydrating solution, the detector positioned with an environmental access aperture of the electrochemical sensor extending into the interior region of the jacket which in part surrounds an inflow port of the gas detector, the detector's front panel and protruding member providing a seal against the external environment wherein the detector's front panel and the jacket form a sealed chamber around the interior region and second closed region;a vapor permeable membrane between at least a portion of the two regions; anda heating element carried adjacent to the second region that operates to carry out one of hydrating and dehydrating of the electrolyte of the electrochemical sensor wherein a relative humidity within the sealed chamber is controlled in a fixed or dynamic fashion so as to restore a concentration of the electrolyte within the gas sensor to the first hydration level and wherein a relative humidity in the sealed chamber is controlled by varying the temperature of the hydrating solution via the heating element. 13. An apparatus as in claim 12 where portions of the interior region carry an externally accessible deformable seal. 14. An apparatus as in claim 12 where the housing includes a side wall that, at least in part, bounds the interior region. 15. An apparatus as in claim 14 where the side wall includes a peripheral surface, adjacent to part of the interior region, the peripheral surface having a closed cross-section. 16. An apparatus as in claim 15 where the closed cross-section is one of at least partly curved, or, partly linear. 17. An apparatus as in claim 16 where the membrane is oriented so as to be substantially parallel to a plane that includes the cross-section. 18. An apparatus as in claim 16 where the side wall extends generally parallel to a line normal to at least a portion of the membrane. 19. An apparatus as in claim 18 where the side wall has first and second ends with one end terminating adjacent to the membrane, and the other displaced therefrom in a direction along the line normal thereto. 20. An apparatus as in claim 19 which includes at least one of an electrical connector for the heating element, and, a fill port for the second region. 21. An apparatus as in claim 20 where the interior region of the housing substantially encloses a selected gas detecting member.
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이 특허에 인용된 특허 (5)
Jppinen Kalervo A. (Helsinki FIX) Hakala Marja-Riitta (Vantaa FIX) Jalava Jouko S. (Vantaa FIX) Lehto Ari (Helsinki FIX), Field usable calibrator for humidity meters.
Nolan Mary E. (Topsfield MA) Kosek John A. (Danvers MA) La Conti Anthony B. (Lynnfield MA), Gas sensing and measuring device and process using catalytic graphite sensing electrode.
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