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Pulsed discharge detectors

VICI PDDs (pulsed discharge detectors) utilize a stable, low powered, pulsed DC discharge in helium as an ionization source. Eluants from the column, flowing counter to the flow of helium from the discharge zone, are ionized by photons from the helium discharge. The bias electrode(s) focus the resulting electrons toward the collector electrode, where they cause changes in the standing current which are quantified as the detector output. Performance is equal to or better than detectors with conventional radioactive sources.

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. For this type of compound, the minimum detectable quantity (MDQ) is at the femtogram (10-15) or picogram (10-12) level. The PDD is similar in sensitivity and response characteristics to a conventional radioactive ECD, and can be operated at temperatures up to 400°C. For operation in this mode, He and CH4 are introduced just upstream from the column exit.

In the helium photoionization mode, the PDD is a universal, non-destructive, high sensitivity detector. The response to both inorganic and organic compounds is linear over a wide range. Response to fixed gases is positive (increase in standing current), with an MDQ in the low ppb range. The PDD in helium photoionization mode is an excellent replacement for flame ionization detectors in petrochemical or refinery environments, where the flame and use of hydrogen can be problematic. In addition, when the helium discharge gas is doped with a suitable noble gas, such as argon, krypton, or xenon (depending on the desired cutoff point), the PDD can function as a specific photoionization detector for selective determination of aliphatics, aromatics, amines, as well as other species.

Available for 110 VAC and 230 VAC.

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showing 20 of 23 products
Reference VA-D-2-110
Description Pulsed discharge detector PDEC D/HID/PID 48V detect  controller, HP2, 110Vac CE
Price 18.480,00€
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Reference VA-D-2-220
Description Pulsed discharge detector PDEC D/HID/PID 48V detect  controller, HP2, 220Vac CE
Price 18.480,00€
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Reference VA-D-2-I-110
Description Pulsed discharge detector opti mized HID 48V detect  controller, HP2, 110Vac CE
Price 16.170,00€
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Reference VA-D-2-I-220
Description Pulsed discharge detector opti mized HID 48V detect  controller, HP2, 220Vac CE
Price 16.170,00€
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Reference VA-D-3-I-7890-110
Description Pulsed discharge detector HID/ PID HP7890, pulser, HP electrometer, HP2-110, HPM-110, PC
Price 17.325,00€
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Reference VA-D-3-I-7890-220
Description Pulsed discharge detector HID/ PID HP7890, pulser, HP electrometer, HP2-220, HPM-220, PC
Price 17.325,00€
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Reference VA-D-3-I-HP-110
Description Pulsed discharge detector HID/ PID HP6890 pulser, HP electrometer, HP2-110
Price 18.480,00€
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Reference VA-D-3-I-HP-220
Description Pulsed discharge detector HID/ PID HP6890 pulser, HP electrometer, HP2-220
Price 18.480,00€
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Reference VA-D-4-I-110
Description Pulsed discharge detector PD H ID/PID 48V detector,  controller, HP2, 110Vac CE
Price 15.015,00€
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Reference VA-D-4-I-220
Description Pulsed discharge detector PD H ID/PID 48V detector,  controller, HP2, 220Vac CE
Price 15.015,00€
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Reference VA-D-4-I-HP58-110
Description Pulsed discharge detector HeID /PID HP5890, 48V detector, controller, HP2, 110Vac CE, PC
Price 15.015,00€
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Reference VA-D-4-I-HP58-220
Description Pulsed discharge detector HeID /PID HP5890, 48V detector, controller, HP2, 220Vac CE, PC
Price 15.015,00€
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Reference VA-D-4-I-R-110
Description Pulsed discharge detector HeID /PID 110V detector, w/o controller, HP2-110
Price 0,00€
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Reference VA-D-4-I-R-220
Description Pulsed discharge detector HeID /PID 220V detector, w/o controller, HP2-220
Price 0,00€
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Reference VA-D-4-I-R-48-220
Description Pulsed discharge detector HeID /PID 48V detector, w/o controller, HP2-220
Price 0,00€
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Reference VA-D-4-I-R-TQI
Description Pulsed discharge detector HeID /PID retrofit, pulse r, HP2-220, ThermoQuest
Price 0,00€
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Reference VA-D-4-I-RU-110
Description Pulsed discharge detector HeID /PID universal retro fit, pulser, HP2-110
Price 0,00€
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Reference VA-D-4-I-RU-220
Description Pulsed discharge detector HeID /PID universal retro fit, pulser, HP2-220
Price 0,00€
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Description Pulsed discharge detector HeID /PID Shimadzu 14, w/o controller, HP2-110, PC
Price 11.025,00€
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Description Pulsed discharge detector HeID /PID Shimadzu 17, w/o controller, HP2-110, suitable for 2010
Price 11.025,00€
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showing 20 of 23 products