Measuring and testing – Sampler – sample handling – etc. – With heating or cooling
Patent
1980-06-03
1982-06-29
Swisher, S. Clement
Measuring and testing
Sampler, sample handling, etc.
With heating or cooling
204195S, G01N 122
Patent
active
043367216
ABSTRACT:
The gas sampling apparatus may be embodied as a hot sampler or a cold sampler, and basically comprises an insulated housing concentrically supporting an inlet tube which in turn supports a nozzle through which the gas sample is metered, passing to the detection cell. The gas sample is drawn past the cell by an aspirator. A controllable heater is disposed concentrically about the inlet tube and proximate to the aspirator for maintaining the sensing cell at its perferred operating temperature which in one case is 704.degree. C. The aspirator is preferably maintained above 430.degree. C. but below 590.degree. C. by the heater. By maintaining the sample gas in this elevated temperature range, accumulation of residuals of the process are avoided. Provision is made for periodic purging of the apparatus with fresh air to remove residuals from the sampler.
REFERENCES:
patent: 2753246 (1956-07-01), Shields et al.
patent: 3960500 (1976-06-01), Ross
Hague International
Swisher S. Clement
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