[Stoves] Testing exhaust gas

[John Davies]

Greetings,

There are two ways of doing this.

In both cases a sample probe ( pipe ) is inserted into the gas flow, and is 
either long enough to allow natural cooling of the sample, or is connected 
to a cooling coil immersed in water.

1. the cool gas is sucked into a portable gas analyser, giving instant 
results.

2. the gas is sucked into a plastic syringe of about 1 litre capacity. the 
syringe is filled and emptied about 3 times to obtain a good sample, after 
which the spout is sealed. the syringe is then sent to a gas testing lab for 
analysis. The lab would normally supply the syringe, and test it for leakage 
before handing it over.
this is the method used in the petrochemical industry for gas samples taken 
at atmospheric pressure. the lab is usually close by. If there is to be a 
time delay between sampling and testing, about 3 samples would be taken to 
eliminate any inaccuracies due to leakage.

Hope this is of assistance.

John Davies.

>
> Would someone please relate detailed instructions for taking and analyzing 
> a
> gas sample?  I can imagine a container over an exhaust port but the
> container would already be holding ambient air, wouldn't it?
>
> Neal