Test-tube throttle

Details Test-tube throttle Test-tube throttle

G - Physics

01

N

150/20

G01N 1/22 (2006.01) G01N 21/78 (2006.01) G01N 31/22 (2006.01) G01N 1/28 (2006.01) G01N 1/40 (2006.01)

Patent

CA 1288323

ABSTRACT The invention describes a test-tube for the quantitative measurement of very small concentrations of gas components with a reagent strip impregnated with chemical reagents. Arranged before the reagent strip in the direction of flow of the test gas, is a flow throttling element. By means of this arrangement, the test air, which is passed through the test-tube by an air feed pump, has its forward motion throttled to such an extent that the test air flows slowly past the sensitive reagent strip producing a change of colour in zones.

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