Calibration card for oxygen optical sensors
First Claim
1. A calibration card for use in calibrating an optical sensor, comprising a unitary structure bearing (i) a first mass of an oxygen sensitive fluorophore configured and arranged for limiting exposure of the first mass of oxygen sensitive fluorophore to near zero % oxygen, and (ii) a second mass of an oxygen sensitive fluorophore configured and arranged for exposing the second mass of fluorophore to an environmental concentration of oxygen.
1 Assignment
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Accused Products
Abstract
A calibration card 10 and method of using the card 10 to calibrate an optical sensor. The card 10 comprises (i) a first mass of an oxygen sensitive fluorophore 41 configured and arranged for limiting exposure of the first mass of oxygen sensitive fluorophore 41 to near zero % oxygen, and (ii) a second mass of an oxygen sensitive fluorophore 42 configured and arranged for exposing the second mass of fluorophore 42 to an environmental concentration of oxygen.
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Citations
22 Claims
- 1. A calibration card for use in calibrating an optical sensor, comprising a unitary structure bearing (i) a first mass of an oxygen sensitive fluorophore configured and arranged for limiting exposure of the first mass of oxygen sensitive fluorophore to near zero % oxygen, and (ii) a second mass of an oxygen sensitive fluorophore configured and arranged for exposing the second mass of fluorophore to an environmental concentration of oxygen.
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13. A method of calibrating an optical oxygen sensor having a calibration mode, comprising the steps of:
- (A) obtaining a calibration card having at least (i) a first mass of an oxygen sensitive fluorophore configured and arranged for limiting exposure of the first mass of oxygen sensitive fluorophore to oxygen, whereby the oxygen concentration to which the first mass of oxygen sensitive fluorophore is exposed is a known lower value, and (ii) a second mass of an oxygen sensitive fluorophore in fluid communication with the environment for exposing the second mass of oxygen sensitive fluorophore to an environmental concentration of oxygen, whereby the oxygen concentration to which the second mass of oxygen sensitive fluorophore is exposed is a known higher value, (B) setting the optical sensor to calibration mode, and (C) sequentially taking an oxygen concentration reading from each of the masses of oxygen sensitive fluorophore such that the oxygen concentration readings are correlated with the lower and higher values to which the mass of oxygen sensitive fluorophore is exposed.
- View Dependent Claims (15, 16, 17, 18, 19, 21, 22)
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14. A method of calibrating an optical oxygen sensor having a calibration mode, comprising the steps of:
- (A) obtaining a calibration card having at least (i) a first mass of an oxygen sensitive fluorophore isolated from the environment and in fluid communication with an oxygen scavenging material effective for scavenging oxygen from the first mass of oxygen sensitive fluorophore, whereby the oxygen concentration to which the first mass of oxygen sensitive fluorophore is exposed is a known lower value, and (ii) a second mass of an oxygen sensitive fluorophore in fluid communication with the environment for exposing the second mass of oxygen sensitive fluorophore to an environmental concentration of oxygen, whereby the oxygen concentration to which the second mass of oxygen sensitive fluorophore is exposed is a known higher value, (B) setting the optical sensor to calibration mode, and (C) sequentially taking an oxygen concentration reading from each of the masses of oxygen sensitive fluorophore such that the oxygen concentration readings are correlated with the lower and high values to which the mass of oxygen sensitive fluorophore is exposed.
- View Dependent Claims (20)
Specification