Input on water testing and maintenance controllers

lyfespan

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Ok so I've got my RO system and tanks , I was wondering what's a good test maintenance system HANNA, blue lab, future harvest, Milwaukee.... I don't want to be replacing probes all the time, or calibrating.
 
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I am not sure that I have seen any meters that don't need to be calibrated periodically? Are there any?
 

lyfespan

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I am not sure that I have seen any meters that don't need to be calibrated periodically? Are there any?
I'm kinda hoping there are, I would love one less thing to worry about.


[ame="http://www.amazon.com/dp/B001EHAZGW/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=2SUGRG0CWS4V0&coliid=I1XVG9W6GXG1TZ"]http://www.amazon.com/dp/B001EHAZGW/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=2SUGRG0CWS4V0&coliid=I1XVG9W6GXG1TZ[/ame]
I found this one to watch my water at the main collection tank

Then I just need one for the veg and bloom reservoirs to watch my feed ppm.
 

BillFromBio

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I use the hanna all in one. Tests temp ppm Ph and EC. I buy the 2 part calibration solution by GH for $15 and periodically calibrate for peace of mind. Was the first thing I bought when starting Hydro and was the best $150 I spent.
 

lyfespan

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I use the hanna all in one. Tests temp ppm Ph and EC. I buy the 2 part calibration solution by GH for $15 and periodically calibrate for peace of mind. Was the first thing I bought when starting Hydro and was the best $150 I spent.
I'm going to have it running daily, about how much time is going to be calibrating?
 

Joe420Camel

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pull the sensor
clean it
dip it in the control solution
turn screw till readout matches solution
(in some Ph meters there is a high and low solution (7,4) so do the above twice)
clean sensor
back in action

10 mins? once, twice(?) a month?
 

zem

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I use the hanna all in one. Tests temp ppm Ph and EC. I buy the 2 part calibration solution by GH for $15 and periodically calibrate for peace of mind. Was the first thing I bought when starting Hydro and was the best $150 I spent.
when did you start hydro? I'm curious as to how long can a meter live without having to change its probe or change it altogether
 

MR1

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I have had my tds and ph meter for over 6 years, same probes on both, work as good as new.
 

zem

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I have had my tds and ph meter for over 6 years, same probes on both, work as good as new.
wow! 6 years, thats great, could you please give me their name and model code to check em out? thanks
 

MR1

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There are newer models of these, but these are the ones I have.

[ame="http://www.amazon.com/HMDPHM80-Digital-pH-Temperature-Meter/dp/B0096N8OWI/ref=sr_1_1?ie=UTF8&qid=1420507785&sr=8-1&keywords=HM+digital+ph80"]http://www.amazon.com/HMDPHM80-Digital-pH-Temperature-Meter/dp/B0096N8OWI/ref=sr_1_1?ie=UTF8&qid=1420507785&sr=8-1&keywords=HM+digital+ph80[/ame]
[ame="http://www.amazon.com/HM-Digital-TDS-4TM-Meter-Thermometer/dp/B001RK38LU/ref=sr_1_4?ie=UTF8&qid=1420507894&sr=8-4&keywords=HM+digital+tds"]http://www.amazon.com/HM-Digital-TDS-4TM-Meter-Thermometer/dp/B001RK38LU/ref=sr_1_4?ie=UTF8&qid=1420507894&sr=8-4&keywords=HM+digital+tds[/ame]
 
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zem

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Thanks MR1, green mojo your way. my DD TDS meter looks like a copy of yours. http://www.warehouse-aquatics.co.uk/d-d-tds-meter.html with the stability of the reading and ease and reliability so far 1 year, I really hope it lasts anything close to 6 years! it is calibrated with NaCl, which makes it super easy to make my own calibrating solution at home. I calibrate it with 1000ppm solution because the closer the calibration solution's ppm is to the ppm that you are testing, the more accurate the reading. I clean it with regular tap water, how about you? thanks again
 

MR1

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Your welcome Zem. I calibrate my ph pen maybe once a month wether it needs it or not and just rinse with tap water also, same with storage , just tap water. I have never calibrated my tds meter, does not seem to have changed over the years, probably has though. How do you make your own calibrating solution. if I may ask?
 

zem

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. How do you make your own calibrating solution. if I may ask?
My meter has written near the calibration screw "calibrated with NaCl" AKA salt. 1 gram of salt in 1 liter of water is 1000ppm. when I got it it was calibrated and i have a gold weight scale so i got 1 gram of salt in 1 liter distilled water and tested it, it was like 990 or so, but it was calibrated to 350ppm so i calibrated it to 1000 and it works great and i have a 1liter bottle of 1000ppm solution
 

MR1

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Thanks Zem, does it have to be distilled water? I will try it and see where my meter is at.
 

zem

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Thanks Zem, does it have to be distilled water? I will try it and see where my meter is at.
oh yeah sure, because it has to be 0 ppm before adding the NaCl or else it will add up to more than 1000ppm.
 

MR1

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Makes sense, thanks.
 
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