Title:
Gas detector
United States Patent 2573390
US Patent References:
Testing apparatus and method
- - 1570781

Velocity measuring apparatus
- - 1935445

Method of logging wells
- - 2214674


Inventors:
Andre, Blanchard
Publication Date:
10/30/1951
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Assignee:
SCHLUMBERGER WELL SURV CORP
Primary Class:
340/606
Other Classes:
367/83, 73/19.090, 73/19.030, 73/599, 73/590, 367/25, 340/632, 73/152.040
International Classes:
G01N29/032; G01N29/02