Photoionization detector PID

gas

PID - Photo Ionization Detector Responds to molecules with carbon double bonds and aromatics Sensitive (down to 10 ppb) and non-destructive Mandated in several EPA methods Extremely long lamp life The SRI PID uses the industry standard 10.6eV PID lamp in a spring-loaded mount, which allows the lamp to be removed, cleaned and re-installed in seconds, without tools. Use of the Photo Ionization Detector is mandated in several EPA methods (8021, TO-14, etc.) because of its sensitivity and selectivity. Detection limits for aromatics are in the low picogram (ppb) range. Because it is non-destructive, it is often run in series with other detectors typically the FID/DELCD combination detector—for multiple chromatograms from a single injection. The PID is also able to run on air carrier, which can be useful in situations where no gas is available, or for stream monitoring applications where no column is used to separate compounds. Unlike other PID designs, the lamp on the SRI PID can be easily removed, without tools, for the periodic cleaning of the lamp window to avoid interference from column bleed build-up. Lamps can last years on the SRI PID because only the lamp window is heated, not the entire body of the lamp.