Blog by: Derek Stuart – Ametek Land.
Opacity monitors are used to measure emissions of smoke and dust from combustion sources. It is a non-contact measurement, with only a light beam penetrating into the combustion gases in the stack or duct, so the delicate optical and electronic components can be mounted in the ambient conditions.
However the instrument needs to be mounted directly on the stack, and so there is a risk of damage if the hot, dusty and corrosive flue gases make contact with the instrument’s optical surfaces. That is why it is important to provide a continuous flow of clean, filtered purge air through the instrument’s mounting and into the stack. (Read More)