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I’ve put together a cost effective way to continuously monitor my ppms, ph and temp. Everything together cost about the same as a decent meter alone. Everything is available on amazon for about $140.
The ppm monitor is by HM it has two leads so you can monitor different parts of your system. Cost about $50, there’s a cheaper model but you can’t calibrate the leads separately. I think that one is like $35.
The ph monitor is just call 2 in 1 ph temperature monitor. It come with a ph probe that...
Cost effective ph/tds/temp monitoring
The ppm monitor is by HM it has two leads so you can monitor different parts of your system. Cost about $50, there’s a cheaper model but you can’t calibrate the leads separately. I think that one is like $35.
The ph monitor is just call 2 in 1 ph temperature monitor. It come with a ph probe that...
Cost effective ph/tds/temp monitoring
from Hydroponics / Aeroponics https://www.rollitup.org/t/cost-effective-ph-tds-temp-monitoring.1032311/