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http://legacy.library.ucsf.edu/tid/yag55d00/pdf
Plgws 1# Tbe Iliaroaovlesb Osone aensor •
'd ebaical sol.tion, containing the propsr s.ounts of
sarint rea6enls, is netarod into the s .n.or by wS of
the solation supely tube . Tbe solution fiovs in a thin
fiL down over the electrode support 'E", tipan which are
se ntd naro turns of a fine vire eathod . "C" and ti-v tarns
ef a virs anode "A", .aud is depoaited '!n the vaste resersoir
V". Tbe air saaple eet.rs through "0", is pvaped
through the sensor by way of the narrov snnulus "11" vhere
it eoe.s into intiaate contact vitb the solution contained
on the electrode support, an.d exits at "J". A saall
potential is supplied aeroas the catbode and anode by a
. . . D .C, pover_suFp2y and the cursent is deasusad by the
sticroa~o.eter.'.41
bydrog.n layer builds to its mazlaum and the pclarisation current
ceases. Th. iodine rd.asd by the esone vill r.aet with the WroSent
sjou-• .2ffi. (4)
Decaus* of this bydrod.n loss, the catbede vill r.-stablisb quilibrium
and a repnlerisation curr .nt viil flor. Consquetitly aaob oson. sale-
eale decayina ultisataly releases tMO eleotrons and the current flow
is direotly proportional to the es,one coneentration .JJ2
!be outputs of tbe two oson. m .ters wre oonneeted to a lfast
lfodal 725-3CS Strip Chart Seoorder, obtaind froa the FAst Dsvelop-
sy .at Co .pany, by .wns of a bomemade eas,-driwn siicrosvitob. Tbe eaa
sbaft was powered by a one half r ..olution per winute synchronous