Real time for chemical sensors usually represents a minute or less, but some researchers use the term to loosely.
An important consideration for this technique is how low of a concentration can it detect (i.e. what is the limit of detection?). Currently, NO sensor can measure these metals in the part-per-billion level in Real time. The instruments needed for these levels are large, expensive ($20K-100K+), and are far from real time.
(FYI: part-per-billion is essentially 1 microgram of the metal per liter of water...very small)
I haven't read any journal articles on this sensor, but I think there are serious limitations on its usefullness.
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An important consideration for this technique is how low of a concentration can it detect (i.e. what is the limit of detection?). Currently, NO sensor can measure these metals in the part-per-billion level in Real time. The instruments needed for these levels are large, expensive ($20K-100K+), and are far from real time.
(FYI: part-per-billion is essentially 1 microgram of the metal per liter of water...very small)
I haven't read any journal articles on this sensor, but I think there are serious limitations on its usefullness.