Method for making gas sensing element
First Claim
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1. A method for making a gas sensing element useful in sensing the concentration of a gas in a medium comprising:
- placing sensing composition precursor between and in contact with a transparent, gas impermeable solid disc and an opaque, gas permeable film oppositely disposed from said transparent, gas impermeable solid disc, said sensing composition precursor comprising a sensing component and a polymer precursor; and
, thereafter,forming from said sensing composition precursor sensing composition including gas permeable and light permeable polymeric material and said sensing component, said forming including reacting said polymer precursor.
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Abstract
A method for making a sensing element, and an assembled sensing element, useful in sensing the concentration of a gas, e.g., carbon dioxide, in a medium, e. g. blood, are disclosed. In one embodiment, the method comprises placing a quantity of a sensing composition precursor between and in contact with a transparent, gas impermeable solid disc and an opaque, gas permeable film, the sensing composition precursor comprises a sensing component, a polymer precursor and a cross-linking agent; and forming a gas sensing composition from this quantity of sensing composition precursor.
105 Citations
25 Claims
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1. A method for making a gas sensing element useful in sensing the concentration of a gas in a medium comprising:
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placing sensing composition precursor between and in contact with a transparent, gas impermeable solid disc and an opaque, gas permeable film oppositely disposed from said transparent, gas impermeable solid disc, said sensing composition precursor comprising a sensing component and a polymer precursor; and
, thereafter,forming from said sensing composition precursor sensing composition including gas permeable and light permeable polymeric material and said sensing component, said forming including reacting said polymer precursor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for making a plurality of gas sensing elements useful in sensing the concentration of a gas in a medium comprising:
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placing sensing composition precursor in contact with an opaque, gas permeable film, said sensing composition precursor comprising a sensing component and a polymer precursor; placing a plurality of transparent, gas impermeable solid discs in contact with said sensing composition precursor;
thereafter,forming from said sensing composition precursor sensing composition including gas permeable and light permeable polymeric material and said sensing component, said forming including reacting said polymer precursor; and forming individual gas sensing elements each of which includes one of said transparent, gas impermeable solid discs, a portion of said sensing composition and a portion of said film. - View Dependent Claims (14, 15, 16, 17)
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18. A method for making a sensor useful in sensing the concentration of a gas in a medium comprising:
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placing sensing composition precursor between and in contact with a transparent, gas impermeable solid disc and an opaque, gas permeable film, said sensing composition precursor comprising a sensing component and a polymer precursor;
thereafterforming from said sensing composition precursor sensing composition including gas permeable and light permeable polymeric material and said sensing component, said forming including reacting said polymer precursor, the combination comprising said sensing composition, said transparent, gas impermeable solid disc and said opaque, gas permeable film being referred to as a sensing element; and placing said sensing element at least partially in a cavity having an open end and being located in a substantially transparent sensor holder so that said opaque, gas permeable film is exposed to the medium. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification