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TDS/EC meter replacement
- Thread starter RFheavy
- Start date
G
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Guest
15$ honeforest that nebula recommend. It's a fine piece
az2000
Guest
I would look for 4-digit readout, temperature-compensation, and pay attention to the batteries used. I think some meters are popular because they use more-common CR-2032 (or whatever) batteries.
My Hanna EZ-TDS isn't temperature compensated, has the x10 readout (for over 999ppm), and uses LR-44 batteries that I had a little trouble finding locally (but, they're cheap online). It's lack of temp compensation makes some difference (if I use some water stored in the garage, and it's hot, it will read higher ppms). But, I'd really like to have a more accurate 1000+ readout. It seems twitchy when "x10" is flashing.
I've seen an inexpensive ($15 USD) meter branded Simpure or Membrane Solutions. It's 4-digit and temp compensating. (Not sure about the batteries.). I've been thinking about buying it. I wouldn't mind spending more on a better meter. But, I can't tell what's better. It's not clear to me if the other meters are 4-digit. They usually don't say what battery they use.
FWIW: You can cheaply calibrate your TDS meter using 1 gram of ordinary kitchen salt in 1 liter distilled water. That creates 1000ppm. For the purpose of growing, that's close enough. You don't need laboratory-grade calibration solutions.
My Hanna EZ-TDS isn't temperature compensated, has the x10 readout (for over 999ppm), and uses LR-44 batteries that I had a little trouble finding locally (but, they're cheap online). It's lack of temp compensation makes some difference (if I use some water stored in the garage, and it's hot, it will read higher ppms). But, I'd really like to have a more accurate 1000+ readout. It seems twitchy when "x10" is flashing.
I've seen an inexpensive ($15 USD) meter branded Simpure or Membrane Solutions. It's 4-digit and temp compensating. (Not sure about the batteries.). I've been thinking about buying it. I wouldn't mind spending more on a better meter. But, I can't tell what's better. It's not clear to me if the other meters are 4-digit. They usually don't say what battery they use.
FWIW: You can cheaply calibrate your TDS meter using 1 gram of ordinary kitchen salt in 1 liter distilled water. That creates 1000ppm. For the purpose of growing, that's close enough. You don't need laboratory-grade calibration solutions.