The pulsed discharge detector (PDD) utilizes a stable, low-powered, pulsed DC discharge in helium as the ionization source. Performance is equal to or better than GC detectors with conventional radioactive sources. In the helium photoionization mode, the PDD is a universal, non-destructive, high sensitivity detector. In the electron capture mode, the PDD is a selective detector for monitoring high electron affinity compounds such as freons, chlorinated pesticides, and other halogen compounds. (Read more)
Model D-2 Stand-alone system
The D-2 is a dual mode, universal detector system which can be retrofitted to your older GC. The D-2-I is a helium photoionization detector, optimized for trace level work with packed columns.
Model D-3 is optimized for trace level work in the helium photoionization mode, with plug-and-play capability for both the 6890 and the 7890.
Model D-4 is available in version for easy installation on most of the GCs in current use. It is optimized for helium photoionization.