Manufacturer says the newest member of its Pulsed Discharge Detector (PDD) family is also the smallest and thriftiest. The miniPDD Helium Ionization Detector uses about one fifth (20%) the amount of helium as the VICI-Valco D-3 and D-4 versions, giving up only a bit of sensitivity and dynamic range in return. It is approximately one half the size of the D-4, but has nearly the same sensitivity – about 100 ppb for fixed gases. With its reduced size, weight, and helium consumption, it is particularly well suited to portable applications, or to any situation in which the high cost of helium becomes a consideration.
Valco Instruments
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