Recommend a PH and PPM meter

[Thumper68]

I am looking for a recommendation for a PH and PPM meter. I am completly new at this so please let know what you use, what you would buy in my sitatuion, etc. Should i get a dual unit or seperate ones?

Thanks,

 

[Trash_2002]

hanna combo meters lasts for years. make sure to buy all the solutions (4.01/7.01/EC 1413uS/Storage/Cleaning). im on my third hanna in 20+ years, they last up to 7 years if taken good care.
don't drop it, and don't try to measure RO water with it :-)
calibrate monthly ideally, but every two months for our girls will work too if running out of solutions.

i see a 0.01 to 0.02 PH deviation in a month without calibrating.

 

[Natep]

Blue lab