Self-contained cryogenic gas sampling apparatus and method
First Claim
1. Apparatus for obtaining a whole gas sample, comprising:
- a sample vessel having an inlet for receiving a gas sample;
a controllable valve mounted in said inlet for controllably opening and closing said inlet;
valve control means coupled to said valve for opening and closing said valve at selected times;
a portable power source connected to said valve control means for supplying operating power to said valve control means;
a cryogenic coolant; and
means containing said coolant and placing said coolant in thermal communication with said vessel for cooling the interior of said vessel to cryogenic temperatures.
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Accused Products
Abstract
Apparatus for obtaining a whole gas sample, composed of: a sample vessel having an inlet for receiving a gas sample; a controllable valve mounted for controllably opening and closing the inlet; a valve control coupled to the valve for opening and closing the valve at selected times; a portable power source connected for supplying operating power to the valve control; and a cryogenic coolant in thermal communication with the vessel for cooling the interior of the vessel to cryogenic temperatures.
A method of obtaining an air sample using the apparatus described above, by: placing the apparatus at a location at which the sample is to be obtained; operating the valve control to open the valve at a selected time and close the valve at a selected subsequent time; and between the selected times maintaining the vessel at a cryogenic temperature by heat exchange with the coolant.
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Citations
12 Claims
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1. Apparatus for obtaining a whole gas sample, comprising:
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a sample vessel having an inlet for receiving a gas sample; a controllable valve mounted in said inlet for controllably opening and closing said inlet; valve control means coupled to said valve for opening and closing said valve at selected times; a portable power source connected to said valve control means for supplying operating power to said valve control means; a cryogenic coolant; and means containing said coolant and placing said coolant in thermal communication with said vessel for cooling the interior of said vessel to cryogenic temperatures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Apparatus for obtaining a whole gas sample, comprising:
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a sample vessel having an inlet for receiving a gas sample; a controllable valve mounted in said inlet for controllably opening and closing said inlet; valve control means coupled to said valve for opening and closing said valve at selected times; a portable power source connected to said valve control means for supplying operating power to said valve control means; a cryogenic coolant; and means containing said coolant and placing said coolant in thermal communication with said vessel for cooling the interior of said vessel to cryogenic temperatures, wherein said sample vessel is removable from said means containing said coolant.
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Specification