Are cheap EC pens accurate?

F

father nature

Well-Known Member
yes they are. especially the ec meters. even the ph pen are good. i use a 20euros one and it works even better than the bluelab meter i had
 
It's all about how lucky you are with the cheap ones.
That's suppose to read pH7.3~7.4 1030ppm
Why not just calibrate your blue?
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I have both bluelabs and those cheap from amazon it just drives me crazy don’t know which one to believe I just pay attention to the plants they will tell you when it’s to much
 
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father nature said:
In 25 years I'm sure you have it down to a science. But as a newbie how am I supposed to know the concentration of ferts in my water without a EC/ppm meter?
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Once you mix up a few gallons you ll know,I go by ml per litre.Says 5ml/L on bottle I feed at 1.5 A and B Gives me .5 ec.Go up by .5 more ml from there.
And yes ive had good luck with cheap ppm meters.
 
I calibrate my meters quarterly just because I use them almost every day. out of all the meters I've bought I feel like the blue labs are the most accurate if u keep doing Maintainance on them. they are just like every other pen just higher quality.
 
Tonycannavis said:
I have both bluelabs and those cheap from amazon it just drives me crazy don’t know which want to believe I just pay attention to the plants they will tell you when it’s to much
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I bought the cheap one for the hell of it. I have the Bluelab 2.77 EC test solution. I'll check it and calibrate it to that. I only have a few weeks left in the grow this year so it should hopefully get me through the season
 
I've had nothing but bad results from cheap EC and pH meters. The couple of cheap EC meters ive tried gave readings upwards of 150-200ppm difference between them. I went to a Bluelab and have been so much happier and less frustrated ever since.
 
This one can be calibrated.

Digital Calibration (push button)

HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, 2% Readout Accuracy: Tds Meter: Amazon.com: Industrial & Scientific

HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, 2% Readout Accuracy: Tds Meter: Amazon.com: Industrial & Scientific
www.amazon.com

(Use the HM Digital TDS Calibration Solution (342 PPM) to periodically re-calibrate your HM Digital TDS meter )



Santa might bring me one of these...

Wiztech Digital PH Meter with ATC: 3 in 1 PH TDS Temp - High Accuracy Pocket Size PH Tester 0.00-14.00 PH Measurement Range: Amazon.com: Industrial & Scientific

Wiztech Digital PH Meter with ATC: 3 in 1 PH TDS Temp - High Accuracy Pocket Size PH Tester 0.00-14.00 PH Measurement Range: Amazon.com: Industrial & Scientific
www.amazon.com
 
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