Calibration cell for the calibration of gaseous or non-gaseous fluid constituent sensors
First Claim
1. A reference liquid-containing calibration cell for the calibration of a sensor for measuring a gaseous or non-gaseous constituent parameter of a fluid, comprising a chamber containing a reference liquid, wherein said chamber is sealed to prevent loss of said reference liquid, and wherein said chamber includes:
- (a) means for inletting gas into the chamber, the gas-inletting means including a first semi-permeable membrane permeable to a gaseous fluid constituent but impermeable to said reference liquid and non-gaseous reference constituents in the reference liquid;
(b) means for placing a sensor in communication with a reference constituent present in said reference liquid, said means comprising a port sealed by a second semi-permeable membrane permeable to the gaseous fluid constituent but impermeable to said reference liquid and non-gaseous reference constituents present in the reference liquid; and
(c) means for venting gas from the chamber.
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Accused Products
Abstract
A reference liquid-containing calibration cell for the calibration of a sensor for measuring a gaseous or non-gaseous constituent parameter of a fluid includes a chamber containing the reference liquid. The chamber is sealed to prevent loss of the reference liquid, and provides for communication between the sensor and a reference constituent present in the reference liquid. The chamber includes a gas-inleting port sealed by a first semi-permeable membrane which is permeable to a gaseous fluid constituent but impermeable to the reference liquid and non-gaseous reference constituents present in the reference liquid, the chamber further including a gas vent.
47 Citations
18 Claims
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1. A reference liquid-containing calibration cell for the calibration of a sensor for measuring a gaseous or non-gaseous constituent parameter of a fluid, comprising a chamber containing a reference liquid, wherein said chamber is sealed to prevent loss of said reference liquid, and wherein said chamber includes:
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(a) means for inletting gas into the chamber, the gas-inletting means including a first semi-permeable membrane permeable to a gaseous fluid constituent but impermeable to said reference liquid and non-gaseous reference constituents in the reference liquid; (b) means for placing a sensor in communication with a reference constituent present in said reference liquid, said means comprising a port sealed by a second semi-permeable membrane permeable to the gaseous fluid constituent but impermeable to said reference liquid and non-gaseous reference constituents present in the reference liquid; and (c) means for venting gas from the chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification