Water and Wastewater.com Help Forums - reliable online DO and ammonia sensor

zzzbbbdz YaBB Newbies Offline I love Water and Wastewater.com Posts: 23 Company or Organization: NUS	reliable online DO and ammonia sensor Aug 24^th, 2012, 12:04am Could you please educate me which brand of DO and ammonia online sensor is accurate and reliable in full scale aeration tank?
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Victor God Member Offline Escherichia coli Happens! Posts: 1269 Company or Organization: www.santacruzproductions.com	Re: reliable online DO and ammonia sensor Reply #1 - Aug 24^th, 2012, 12:10am For dissolve oxygen you have to look at luminescent DO probes from HACH, Orion and other manufacturers. Very little maintenance, rugged, reliable.
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argfin

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Re: reliable online DO and ammonia sensor
Reply #2 - Aug 24^th, 2012, 1:41am

I haven't got an online unit, but my handheld Hach probe has been brilliant! Virtually no maintenance at all!

The cap lasts a fixed time (my unit tells you when it has run out - abotu a year I think) and all you do is screw a new one on, put a new 'button' (a chip with info on it) in the lead to tell the controll unit what it's characteristic are and off it goes!

I don't have any direct experience of online ammonia monitoring because I've never used them, I've heard nothing but bad things! Technology might have moved on now, but they used to require a fair amount of maintenance and down time (getting blocked with sludge particles, etc).

Regards,
argfin

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RoCSmith

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Posts: 68
Ohio
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Company or Organization: YSI

Re: reliable online DO and ammonia sensor
Reply #3 - Aug 24^th, 2012, 8:42am

YSI, Hach, and Endress & Hauser offer online optical DO sensors. YSI and Hach offer online ammonium ISE probes. There are also several online cabinet-style analyzers for ammonia/ammonium, e.g. WTW and Chemscan. Fouling is an issue for all online sensors, especially ISEs. However, they have been demonstrated to be stable for extended periods with routine maintenance. Integrated air or water cleaning is also beneficial.

Cheers, RS

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NorCal_Wastewater1 God Member Offline "Wastewater rules! Give sludge a chance!!!" Posts: 1780 CA. Gender: Company or Organization: Wastewater	Re: reliable online DO and ammonia sensor Reply #4 - Aug 24^th, 2012, 9:54am YSI (A Xylem Brand) offers the IQ Sensor net system with the FDO & Ammolyte sensors for online (process) measurements of these parameters. YSI 800-765-4974 (U.S.) +1-937-767-7241 (Outside U.S.) Dallas Schwartz Xylem (Global Water/WTW)
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zzzbbbdz YaBB Newbies Offline I love Water and Wastewater.com Posts: 23 Company or Organization: NUS	Re: reliable online DO and ammonia sensor Reply #5 - Aug 26^th, 2012, 8:41am thanks a lot
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