Measuring and testing – Sampler – sample handling – etc. – With heating or cooling
Patent
1992-11-12
1994-06-21
Raevis, Robert
Measuring and testing
Sampler, sample handling, etc.
With heating or cooling
G01N 100
Patent
active
053219848
ABSTRACT:
An autosampling device for use in sampling air with canisters and analyzing the contents of said canisters for the presence of pollutants which allows random access of the contents of the canisters and controlled direction of the canister contents to a cryogenic concentrator. The device is a cart having shelf members for holding a plurality of canisters. Sample lines are mounted on the cart to be connectable to a canister at one end of said lines and to an inlet port of an electrically actuated multiposition valve at the other end. To protect against sample disruption, a heated zone around the valve controls valve temperature. An outlet sample line enclosed in a heated zone extends from an outlet port on the valve and is connectable to an inlet of the cryogenic concentrator. Selection of specific samples by means of a multiposition valve and the temperatures of the two heated zones may be controlled by connection to a programmed computer, and thermocouple feedback from the cart to the computer may also be provided.
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Lourence et al., "Flexible Bags Collect Gas Samples", Control Engineering, vol. 14 #9, Sep. 1967, p. 105.
Graseby Holdings Corporation
Raevis Robert
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