Take the tour ×  How can one find whether or not there is enough
oxygen for breathing present inside a (dry) well of diameter 1m
at depth of 50m?  Many people in Nepal are killed during
cleaning wells because of lack of oxygen..  share|improve this
question If I understand you correctly, you want to ask if there
is free oxygen for breathing present deep in a dry well, right?
–  ManishEarth Jan 19 at 12:23 If this is for an actual
application, please use whatever answer you get as a starting
point for a consultation with an expert on such matters. – 
jonsca Jan 20 at 1:48 is this a theoretical problem or practical
one, the data seems as if it is for theoretical purpose. – 
Aditya Sriram Jan 20 at 4:03 add comment  1 Answer  The ideal
solution would be a single gas personal detector, such as this
one (it's only the first example I found, I don't know this
brand, but there are many equivalent apparatuses from other
vendors).  While digital personal detectors are expensive ($200+
range), there are simpler systems