Span Gas and Zero Gas

[sagar.tinkhede]

Hi everybody......

Can u plz tell me brief details about following:

Span Gas and Zero Gas.

Which type of gases we can use as span gas and zero gas.

What exactly is carrier gas and why we are using it?

Thank You.

[Bruce Hamilton]

According to Google,

On average, a person farts 16 times a day, and elephants fart the most. So..

Carrier gas is the undissolved gases you swallow and later emit as flatulence, and they determine the flow rate of emissions from you.

Zero gas is an aerosol can of fresh air, with none of the smelly compounds present. Zero gas is undetected flatulence, or a reference mixture of gases that don't trigger downstream sensors.

The span gas is an aerosol can or cylinder containing mixture of the smelly compounds at known concentrations. Span gas is used by the person behind you to quantify the flatulence odour ( usually caused by smelly sulphur compounds ) emitted with the carrier gas. Unfortunately, it can not be a zero gas, and must contain some detectable compounds.

A Google search will provide plenty of information on the use of zero gases and span gases to calibrate other types of emission monitoring.

Please keep having fun,

Bruce Hamilton