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Review on HM Digital SM 1 Monitor Accuracy by Jeremy Jackz
I run both single and dual row TDS monitors from .
I use HM Digital single and double row TDS monitors in my reverse osmosis systems. One of them failed after a few months but was quickly replaced. You may need to periodically unplug and clean the sensors.
Pros
- The auto-off function saves battery power. The device turns off automatically after 10 minutes of inactivity.
Cons
- Big and chunky
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