Photo ionization detectors (PIOs) measure volatile organic compounds (VOCs) and other gases in minute concentrations.
The PIO is an efficient and relatively inexpensive detector that may produce instantaneous readings and can be operated continuously. PIOs may be used for monitoring the Lower Flammable Limit (LFL ) of atmospheres including the presence of low levels of contaminants.
However, the detection of particular products requires specific calibration. Other atmosphere tests, including for sufficient oxygen levels, should be carried out before confirming a space as being safe to enter.
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