Why does my gas detection system hang up for a long period of time after a large signal?
Miniature PIDs in the market place have detection chambers that are not designed to have a pump pulling a sample of gas through them. Having not been designed for inline pumped systems they suffer from the problem of drawing much local air in from around the pellet and thus cannot draw in a gas sample from a distant point through a piping network. However ISL MiniPID has been designed so that it can be used in pumped systems enabling the drawing forth of a sample gas supply from a remote source. This is done by carefully sealing around the lamp, detection cell and electronics module. Also a flat sealed front surface is provided for the OEM user to press a gasket seal against to form the outside sealing. However there is slight leakage through the layered construction of the cell and thus depending upon the pressure differential between the cell and the local environment will vary the amount of inward bound leakage through this leak path. Clearly if there is a positive pressure (MiniPID
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