Input on water testing and maintenance controllers

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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.
 
I am not sure that I have seen any meters that don't need to be calibrated periodically? Are there any?
 
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.
 
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 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?
 
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?
 
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
 
I have had my tds and ph meter for over 6 years, same probes on both, work as good as new.
 
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
 
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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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
 
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?
 
. 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
 
Thanks Zem, does it have to be distilled water? I will try it and see where my meter is at.
 
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.
 
Makes sense, thanks.
 

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