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Model 4430 Photoionization Detector (PID) Specification Sheet0 pages
GC DETECTORS
Model 4430 PID
Photoionization Detector
Description
PID Capabilities
The Model 4430 Photoionization Detector (PID) is a GC
detector that selectively responds to aromatic and olenic
hydrocarbons in the presence of alkanes and other saturated
hydrocarbons. The detector assembly contains an ionizing
chamber, UV lamp, and column makeup adapter and uses a
standalone, high-voltage power supply for the UV lamp.
•
Unique UV-lamp Window Sweep design
minimizes fouling from window surface
contamination
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Lampsaver™ circuit extends lamp lifetime by
turning off lamp when not in use
•
Direct interface to ELCD, XSD™, or FID to form
tandem detector systems, which require only one
detector port
•
Detector vent for venting undesirable sample
solvents
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Compatible with packed and capillary columns
•
Custom engineered to t specic gas
chromatograph models
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Easy operation and maintenance
The 4430 PID features a unique patented Window Sweep™
design that prevents the sample stream from contacting and
contaminating the lamp window. It also allows analysis
of photosensitive compounds, which would otherwise
polymerize on the window surface. The PID is available for
installation on most GC manufacturer’s instruments.
Operating Principle
The sample stream ows through the detector's reaction
chamber where it is continuously irradiated with highenergy ultraviolet light. When compounds are present
that have an ionization potential lower than that of the
irradiation energy (10.2 electron volts with standard lamp),
they are ionized. The ions formed are collected in an
electrical eld, producing an ion current that is proportional
to compound concentration. The ion current is amplied
and output by the gas chromatograph's electrometer.
Principal Applications
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USEPA Methods (502.2, 503.1, 602, 8020, 8021)
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Drinking water/groundwater
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BTEX, GRO, DRO, and VPH
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Underground storage tank monitoring
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Aromatics
•
Waste characterization
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Olens
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Environmental
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Alkenes and alkynes
•
Air pollution/industrial hygiene
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