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  1. As above, a good digital meter will give you...

    As above, a good digital meter will give you automatic temperature-correction and a range of different units (Plato, degrees, etc.). Anton Paar, Mettler and others are available. Calibration is...
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    I don't know how picky abv measurement is in the...

    I don't know how picky abv measurement is in the US but - from this side of the pond - as long as you can prove due diligence with your method/factor then there is no real issue. I'd suggest having...
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    Well it works for some... ...

    Well it works for some...

    https://www.bbc.co.uk/news/uk-41059610
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    You might want to contact Chris Nimptsch at...

    You might want to contact Chris Nimptsch at Profamo about can/bottle piercers.
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    You have a PM about can piercers :)

    You have a PM about can piercers :)
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    The calculation of abv isn't as simple as these...

    The calculation of abv isn't as simple as these formulae suggest, unfortunately. Because 'degrees lost' is not fully linear with the resulting abv, the factor required actually changes across the abv...
  7. We used sample bottles with septa, 2 hypodermic...

    We used sample bottles with septa, 2 hypodermic needles and a lot of *!?#*#*! language, as I recall!

    DO2 meter could have been either Digox or IL540...the latter used a pre-mounted membrane (I...
  8. Dick - are you thinking of the indigo-carmine...

    Dick - are you thinking of the indigo-carmine method? DCI is used as a redox indicator, so doesn't give a measure of oxygen level itself, but rather the reduced-oxidised state of the sample.

    The...
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    If the process can be set up so the bottle stands...

    If the process can be set up so the bottle stands in water (only 8-10mm needed) then you will get the ultrasound transfer necessary, similar to the use of gel in medical applications. It would be...
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    Technically there's no reason why this shouldn't...

    Technically there's no reason why this shouldn't work. However, using an ultrasonic emitter under the bottle may be a better option than a probe as the latter may promote poor micro and infection if...
  11. There are a great number of factors that can...

    There are a great number of factors that can influence the DO2 level over time - initial level, presence of yeast, etc. Generally oxidation is quite rapid, changing over hours rather than days,...
  12. The CBoxQC and also the CarboQC have N2 readings...

    The CBoxQC and also the CarboQC have N2 readings that are very good (NB. sometimes they can show as "Air" rather than "N2" but both can be reconfigured for the latter).

    The N2 readings are widely...
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    Something to consider is that the fundamental of...

    Something to consider is that the fundamental of good pH measurement is the electrode. Meters all use a similar electronics so, if you are working to a budget, my advice would be to buy a good,...
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    Too fast filling flow rate? Not enough keg...

    Too fast filling flow rate? Not enough keg pressure to control gas breakout?
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    Can I ask why you're venting at 15psi? You...

    Can I ask why you're venting at 15psi?

    You should really be carbonating to a stable pressure based on solubility tables, to achieve the carbonation level you want. The amount of CO2 dissolved is...
  16. According to Paar's product literature the new...

    According to Paar's product literature the new DMA takes three standard AA-size batteries. There shouldn't be any need to order these from Paar.
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    Using a DO2 meter to measure oxygen in gases, eg....

    Using a DO2 meter to measure oxygen in gases, eg. tank purge, is simplicity itself!

    All you need do is connect up the meter, open its flow control fully then gently crack open the sample tap. The...
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    Maybe not quite the same, but both Motorhead and...

    Maybe not quite the same, but both Motorhead and Iron Maiden metal bands have ties with UK craft brewers:

    http://cameronsbrewery.com/road-crew-beer-launched/
    https://www.ironmaidenbeer.com/
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    It's always good laboratory practice to...

    It's always good laboratory practice to filter/degas samples before analysing. Filtration doesn't have to be microfine, just enough to remove any visible solids. Similarly with degassing, to be sure...
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    You have a PM.

    You have a PM.
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    Before going to the time/cost of sourcing grade 5...

    Before going to the time/cost of sourcing grade 5 N2, just run some good-quality CO2 or N2 through it to see what it reads on a low-O2 medium. I seem to recall you got low results from it and it's...
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    Almost certainly sounds like protein/polyphenol...

    Almost certainly sounds like protein/polyphenol haze complex, forming over time and with cold temperatures. As well as considering treatment post-fermentation, you might also want to look at your...
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    The Milwaukee result is credible, maybe slightly...

    The Milwaukee result is credible, maybe slightly high but depends on temperature. If your meter always read around 27ppm on tap water even before you calibrated it, then there certainly sounds to be...
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    As per my earlier post, the key here is to...

    As per my earlier post, the key here is to calibrate at atmospheric pressure as I am pretty certain elevated pressure will cause errors.

    Ordinary air, flow-regulated before going into the meter,...
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    As far as I could see, according to the User...

    As far as I could see, according to the User Manual on Hamilton's website, the units preferred for DO2 measurement can be selected from ppb, ppm, vol% and mg/l. However it has a single sensor and...
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