"Runoff pH is useless" or "Keep an open mind"?

simpleleaf

simpleleaf

Well-Known Member
jondamon said:
My bluelab truncheon measures in EC CF PPM but I only use EC.

my water is 0.2EC on my truncheon.

add Calmag to make the truncheon read 0.4EC then I add my base nutes.

you really making things more difficult than they need to be lol.
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As simple as I can make it: In what S/cm scale does the Bluelab truncheon measure EC?
 
jondamon

jondamon

Well-Known Member
simpleleaf said:
As simple as I can make it: In what S/cm scale does the Bluelab truncheon measure EC?
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as simply as I can make it I don’t care lol.

it measures EC. What do I care if it’s in S/cm or ms/cm

EC is measured 0.0-3.8 on my truncheon.

i know my grows EC between 0.6-1.4 why would I concern myself with all the technical nonsense that I don’t need to know.
 
simpleleaf

simpleleaf

Well-Known Member
jondamon said:
as simply as I can make it I don’t care lol.

it measures EC. What do I care if it’s in S/cm or ms/cm

EC is measured 0.0-3.8 on my truncheon.

i know my grows EC between 0.6-1.4 why would I concern myself with all the technical nonsense that I don’t need to know.
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A person may not need to know as they practice using it by themselves. If they're communicating with others, then a number without a scale is basically meaningless, and may lead to confusion and misunderstanding. Any number between 0 and 14 could be referring to pH. If it's clear they mean EC because they stated that next to the number, then 1.4 mS/cm is a vastly different EC from 1.4 µS/cm. Which one is it?

See what I mean?
 
jondamon

jondamon

Well-Known Member
simpleleaf said:
A person may not need to know as they practice using it by themselves. If they're communicating with others, then a number without a scale is basically meaningless, and may lead to confusion and misunderstanding. Any number between 0 and 14 could be referring to pH. If it's clear they mean EC because they stated that next to the number, then 1.4 mS/cm is a vastly different EC from 1.4 µS/cm. Which one is it?

See what I mean?
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I think you are getting confused between EC - Electrical conductivity and CF - Conductivity Factor

Where 1.0EC = 10CF
0.8EC = 8CF etc.

EC is universal. It does not change. It’s a constant.

It’s only when people are using CF/PPM/PPM/TDS where it gets skewed.

When measuring in EC, the resulting testing number will be based on 0.0-5.0 for example depending upon the amount of salts found in the solution.

0AAEFBC3-D39C-45E5-BD7A-1E2CC68A3140.png
 
jondamon

jondamon

Well-Known Member
From Bluelab
These are the four most common conductivity scales:

  • EC (Electrical Conductivity) [1 mS/cm2 = 1 EC]
  • PPM (Parts per Million) [EC x 700]
  • TDS (Total Dissolved Solids) or DS (Dissolved Salts) or MS (Measured Salts); otherwise known as PPM 500 [EC x 500]
  • CF (Conductivity Factor) [EC x 10]
It's important to note that your conductivity measurement is only showing you the total amount of nutrients available to your plants; it will not show you the breakdown of each available nutrient.
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jondamon

jondamon

Well-Known Member
When nutrients dissolve in water, they split into ions. Each of these ions carry an electrical charge, which creates the potential for electricity to move through that solution. Pure water, on the other hand, is a poor conductor of electricity as it doesn't contain ions. The more ions a solution contains, the better it can conduct electricity.

EC is measured in milliSiemens per centimetre, but, unlike pH, there is no universal scale for measuring conductivity. In fact, there are at least four common scales in use, so it's always important to be aware of the scale your conductivity meter - and your nutrient supplier - is using.
 
jondamon

jondamon

Well-Known Member
simpleleaf said:
So Wikipedia was confused when they stated that EC is traditionally cited in µS/cm? Anyone can edit Wikipedia, maybe someone should go over there and correct it?
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Maybe people should stop looking at publicly editable websites and use something more accurate lol.

like I said EC is constant. It doesn’t change how it’s measured.

the only thing that changes is peoples interpretation of EC.

I’ll admit I didn’t know it was mS/cm but I did know that EC is EC it’s not interchangeable.

1.0EC is 1.0EC

500ppm could be 1.0EC or it could be 0.7EC depending upon which PPM calibration is used.

the EC value doesn’t change if it’s measured in EC simple fact.
 
simpleleaf

simpleleaf

Well-Known Member
jondamon said:
God knows within the EU more often than not people are using EC as it’s more universally accepted as a nutrient strength measurement and there is no confusion with calibration (unless your name is @simpleleaf lol)
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Electrical Conductivity: How to Convert mS/cm to uS/cm

www.instrumentchoice.com.au www.instrumentchoice.com.au

The SI measurement unit for electrical conductivity is called Siemens(S). Typically conductivity measurements are displayed in either MilliSiemens per centimetre (mS/cm) or MicroSiemens per cm (μS/cm). It is critical to know how to convert measurements from mS/cm to uS/cm (and vice versa) to ensure you obtain an accurate determination of conductivity, and then draw an appropriate conclusion about a sample's ionic concentration.
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