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mattjm

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I have Weyermann acidulated malt PH 3.4, Im going to add 150g to the 5kg of wey pils to aim for approx 5.3 mash PH?
 

Dan Pratt

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Just as a side note, consider using rainwater instead of RO. Its free and neutral.
 

SBOB

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rude said:
ServoVendi $62 aus delivered havent got it yet going through spanish post fingers crossed
seems like good value... keep us posted that it turns up successfully
 

mattjm

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Im also on the lookout for a good PH meter, so would appreciate an update also. Considering a couple from perth scientific and wondering if its a good idea to get a combo unit to measured TDS and use that as an idication of when to change filters/membranes.
 

rude

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No worries will keep all posted on delivery
 

pbaggoley

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manticle said:
I'm familiar with many sources for the calcium requirement (and none of the new info negates that necessarily - just that the need for additions is overstated and lager requirements are much more minimal).

I'm not at a point where I can say it is definitive as my understanding previously was also from authors such as fix, bamforth, lewis, de clerck, etc but some of the referenced info from martin brungard suggests the requirement for additional calcium may be overstated, especially in regards to lagers.

At no point am I (nor do I believe is he) suggesting calcium does not play a major role in enzyme activity, yeast function and flocculation, pH adjustment, etc.
No worries, I realise now I misread your previous statement in part (I thought you were saying calcium wasn't important, but you were merely pointing out that the oft quoted 50ppm requirement was perhaps an overstatement when it comes to lagers, my bad).

Nor was I disputing it - I just like geeking out on some of the direct references.

This looks like a topic worth keeping an eye out for.

Many of the original references (Fix, De Clerck etc) seem to be a bit dated now, so it's hard to find good new info, and much of it appears contradictory.
 

manticle

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Kodos said:
No worries, I realise now I misread your previous statement in part (I thought you were saying calcium wasn't important, but you were merely pointing out that the oft quoted 50ppm requirement was perhaps an overstatement when it comes to lagers, my bad).
Nor was I disputing it - I just like geeking out on some of the direct references.
This looks like a topic worth keeping an eye out for.
Many of the original references (Fix, De Clerck etc) seem to be a bit dated now, so it's hard to find good new info, and much of it appears contradictory.
There's a post by martin brungard which has a long list of the specific references relevant to this.

I'll see if I can find it.
 

Jack of all biers

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mattjm said:
Im also on the lookout for a good PH meter, so would appreciate an update also. Considering a couple from perth scientific and wondering if its a good idea to get a combo unit to measured TDS and use that as an idication of when to change filters/membranes.
Don't know about a combo unit, but I got my pH meter (LAQUAtwin) on E-bay for $186 delivered with two calibration solutions. Simple to use, compact and accurate. I got the pH 22 model (accurate to 0.01), but the pH 11 would suffice (accurate to 0.1) and it's cheaper. LAQUAtwin also do a TDS meter (Cond) and meters for Calcium ions, Sodium ions, amongst others. I went through E-bay, because to buy direct from the same mob was $10 more postage!!! (taking the piss really).

Made in Japan so can be trusted as opposed to other cheaper manufacturing countries nearby (no names, no pack drill.) http://www.horiba.com/fileadmin/uploads/Scientific/water_quality/Documents/Brochures/HIS/HORIBA_Brochure_PBT-12-2014A_-_LAQUAtwin_Pocket_Water_Quality_Meter__Low-Res_.pdf

I bought mine from Watertest systems in Sydney via E-bay (they charge more if you buy direct from them), but I see it's for $1 less if you want it cheaper from this mob http://www.ebay.com.au/itm/like/172061686951?limghlpsr=true&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=107&chn=ps

I did a fair amount of research and found that for bang for your buck in the quality field testing pH units this one was the best quality for price.
 

mattjm

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Jack of all biers

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Only the top one seems to have much info on it and seems to be a good buy for the price. Like all things cheap it is made in China, but that does not mean anything really, but given they specialise in manufacture of meters, they will probably have it right. http://kedida.en.china.cn/ Just be mindful that with what ever pH meter you go for, if you test your pH at temps higher than room temp (25C) you will decrease the life of your electrode.
 

rude

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Mine still hasn't arrived was sent the 22nd of April according to tacking Number
was the 12 euro postage option though so you would think slower
anyone with experience with Correos registered mail

Top one looks good accuracy 0.02 then again why not 0.01 not sure price is good
 

rude

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Hey Jack looked at those LAQUAtwin recon they would be alright

Initially looked at the omega but they all look about the same sort of style ph meter price range

No micro biologist so just went with gut feeling bit of a punt really

Good point about the temp too

cheers Rude
 

Jack of all biers

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My opinion is that the ad12 would be the better buy. Whilst at $154 it is nearly twice the price it probably will be more reliable over the long term and when the probe does finally go it appears very easy to replace. I would check though how much replacement parts will cost you for each unit and how easy they are to obtain. It looks like you have time to think about it though, as Perth scientific seem to be out of stock today.
 

Jack of all biers

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My opinion is that the ad12 would be the better buy. Whilst at $154 it is nearly twice the price it probably will be more reliable over the long term and when the probe does finally go it appears very easy to replace. I would check though how much replacement parts will cost you for each unit and how easy they are to obtain. It looks like you have time to think about it though, as Perth scientific seem to be out of stock today.
 

mattjm

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Very pricey but may be of interest to some, id be lying if I said I havnt been considering it lol:
https://www.hannainst.com.au/product/HI99151/pH%2BMeter%2Bfor%2BBeer%2BAnalysis%2B

Called the guys today at perth scientific and I was really impressed how helpful and great there customer service was. They have steered me towards the AD11 being the most suited to my needs and warned me against the claims of higher accuracy ph pens being slightly "cheeky". Missed them today after getting stuck at work so a bit more thought over the weekend and make a final decision Monday.
 

Jack of all biers

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mattjm said:
Very pricey but may be of interest to some, id be lying if I said I havnt been considering it lol:
https://www.hannainst.com.au/product/HI99151/pH%2BMeter%2Bfor%2BBeer%2BAnalysis%2B

Called the guys today at perth scientific and I was really impressed how helpful and great there customer service was. They have steered me towards the AD11 being the most suited to my needs and warned me against the claims of higher accuracy ph pens being slightly "cheeky". Missed them today after getting stuck at work so a bit more thought over the weekend and make a final decision Monday.
Yeah the Hanna would be good for a pro-brewer, who can claim it on tax and would use it everyday for reliably accurate pH and Temp readings, but for the homebrewer it is complete over kill (price wise at least). The AD11 ($121 after GST) appears to be the exact same (stats wise) as the pH 11 from Horiba, which I've seen for $125 (plus $10 postage) on e-bay.

Jack of all biers said:
Simple to use, compact and accurate. I got the pH 22 model (accurate to 0.01), but the pH 11 would suffice (accurate to 0.1) and it's cheaper.
 
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