📈 HM Digital TDS 3 Handheld Carrying - Enhance Water Quality Monitoring on-the-Go Review

We live in a semi-rural area with dirt roads and no municipal water supply so we rely on our well water. Raw water is quite heavy with scale and minerals, so we have a good purification system and reverse osmosis system for drinking water. With this little device we can check the concentration of the dissolved substances, but not exactly what is in the water. When I notice my concentration increasing, it's time for a maintenance. It only takes a minute to test the water; so easy.

Got a new fully automatic espresso machine, so I wanted to test our water for scale-causing hardness. This company seems to make a decent range of counters at a reasonable price. Therefore, this meter is designed for testing water filtered from a faucet and refrigerator, mainly because it can be calibrated if necessary. There seems to be some fakes advertising the same name so you need to be careful to verify the seller. Turns out our water is moderately hard and I found that fridge filters…

I just received my new TDS-3 and tried it for the first time with HM-342 calibrant and got a 320 displayed. But a few minutes later I tried the solution again but it showed 440 then a few minutes later 510 and kept reading 510 so I waited another 30 minutes later now it's 477. Same discrepancy with my faucet water. First it was 188 and a few days later it was 147. The same cup and tap water in the kitchen sink. But not with my distilled water. It consistently reads my distilled water at level 2