Advantages of PID Gas Detection
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Relatively low cost detection of a wide range of combustible VOCs, many of which are toxic
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Sensitive to PPM levels – be aware of the lowest detectable limit capability
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Accurate and linear over sensor detection range; but readings are relative to the gas used for calibration – typically isobutylene
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Does not require presence of O2
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UV Tube is self-cleaning due to the creation of Ozone by the detector
Limitations of PID Gas Detection
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VOCs usually detected by means of broad range sensors
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Broad range sensors provide overall reading for general class or group of chemically related contaminants
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Unable to identify type of gas being detected
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Sensor maintenance may be required