trimeter question [Archive] - Growing Marijuana Forum

rockydog

10-10-2006, 01:56 AM

Are ec and ppm the same thing? I am buying my meter tomorrow morning and wanna make sure I get the right one. Any suggestions

Dr.GreenThumb

10-10-2006, 02:10 AM

Which one are you purchasing?

rockydog

10-10-2006, 02:34 AM

I was thinking about this one
http://www.4hydroponics.com/grow_room/trimeter.asp

KADE

10-10-2006, 03:07 AM

They are not the same thing... but basically do the same thing and one reading can be calculated from another. EC/TDS/PPM is basically the same.

Dr.GreenThumb

10-10-2006, 12:48 PM

I was thinking about this one
http://www.4hydroponics.com/grow_room/trimeter.asp

I'm sure that will get the job done...:cool:

rockydog

10-10-2006, 08:23 PM

ok so you guys think this will work? May I ask what the ec is, and where it comes in while growing herb.

Dr.GreenThumb

10-10-2006, 11:23 PM

TDS is the measuring of the amount of salts in a solution. For alot of applications the amount of salt is indicitive of the levels of other stuff in a solution. TDS/PPM meters sold for gardening and aquariums figure the amount of salt in Parts Per Million by measuring the Electrical Conductivity of the solution under test. So a PPM/TDS meter is a EC meter that converts the EC value into PPM values. There are alot of descriptions online about why and how to measure PPM/TDS or EC so google for them if you want alot more details.

EC is a measure of Electrical Conductivity from two probes 1cm apart. 1 EC is = 1 microsiemens, to convert from EC to siemens multiply by 1E-6. EC can be converted to PPM by multiplying by 500. PPM can be converted to EC by dividing by 500.

KADE

10-11-2006, 12:41 AM

What the doc said... basically all the same crap. (but important)