"What is a Multiparameter Meter?

A analytical instrument that can measure multiple parameters, such as pH, EC, TDS, DO and Temperature with one device."

http://www.hannainst.com/Usa/subcat.cfm?id=005

I need a ph meter for spice extraction, but when I searched for one I found these other purposes that I am not aware of what I'd use them for in alkaloid extractions?

These are the go and surprisingly accurate http://m.ebay.com/itm/201148702320?nav=SEARCH

for our purposes, a simple pH meter will suffice.
Dissolved oxygen, total dissolved solids, electroconductivity, etc. are all required for potable water testing per EPA/FDA guidelines.

How much would I spend for a quality simple ph meter? I read about 3 point calibrators and thought that would allow me to calibrate less frequently when using the ph meter for both acid and alkaline solutions.

you can find some good ones for 40-100 bucks. Hanna, Extech, Milwaukee, even Thermo Orion (on ebay)

http://www.hannainst.com/Usa/subcat.cfm?id=040

Which tab should I choose from? The ph meters look very different from each other.

again for simple ph testing use the link above !

I have that one too, works perfect for about 10 bucks.

pH testers on the Hanna site, first one at the top. it also reads temperature.
it's this one
http://www.amazon.com/Ha...id=1287414715&sr=1-1

here are some other decent ones
http://www.amazon.com/s/...ch+pH%2Cindustrial%2C316

I used to have that Hanna pen meter.
I have one of these http://www.ebay.com/itm/...&hash=item27e4d7828d

it is a simple pH meter that will read temp. with the right probe. it requires probes with a BNC connector. Says it requires a 9V battery, but It can also be powered by a typical 9VDC power adapter.
this one is high quality, durable as all get out, and still a standard tester used in the field where EPA testing is required.

I just wanna throw out there while its fitting, how lucky and privileged we are to have benzyme on the site, and all the other folks with vast knowledge. I know it's been said before but worth repeating. This site is at the forefront of knowledge building re: the exploration of consciousness and likely will stay there.

Thanks Ben

thank you

i've learned quite a bit on this site too.

note: whatever meter you get, make sure you also get probe storage solution. Probe glass is a semi-permeable membrane that allows ions to pass freely to/from it, so it needs to be stored in an isotonic solution to ensure long term accuracy.

Okay, I hear you. Thanks for the link.

sØrce said:
"I just wanna throw out there while its fitting, how lucky and privileged we are to have benzyme on the site, and all the other folks with vast knowledge. I know it's been said before but worth repeating. This site is at the forefront of knowledge building re: the exploration of consciousness and likely will stay there.

Thanks "

Thanks everybody

Isotonic solution could be distilled water?

used oakton meters for years, mainly related to gardening projects..

never needed more than ph papers for basic extractions(cacti titrations). never used ph meters or papers for extracting dmt.

and ph papers are super cheap

I heard from endlessness that litmus papers will become dyed from the color of the mhrb interacting with the base, though...

no. it's typically a silver chloride solution, if you have a silver chloride electrode (most are).
distilled water will leach ions from the electrode. good for rinsing it off, bad for storage.

Like this:
http://www.zoro.com/i/G3...SSmKbUTNkrujwaAoFP8P8HAQ

yes.

for me litmus goes very dark and black looking so it's not easy to tell, really, whether it's very dark green or dark purple because of the base mix colour. It's this reason I've opted to buy an e meter. can get by without testing but it's nice to check these things

Is it only necessary for the exposed electrode tip to be in the storage solution?