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The HM Digital COM-100 EC/TDS meter has worked flawlessly for me over the past 3 years. I've calibrated the meter 4 or 5 times during my time as owner. It calibrates well but it could be easier. Overall it shows a reading immediately and it's always been accurate when I've used it. One issue is the cover for the "On/Off" button. The cover now has a small hole in it from turning it off and on so many times. Overall, considering the low price for this meter it's a great deal for such high precision and quality .
Verified purchase: No
Although I don't have much experience with TDS meters, so far it seems to be very accurate when testing various solutions that I have used (basically zero parts per million up 2500 parts). I'm very pleased with it's function and the price that I paid!
Verified purchase: Yes | Condition: New
Good
Verified purchase: Yes | Condition: New
Top
Verified purchase: Yes | Condition: New
Muito bom o equipamento funcionando perfeitamente!!
Verified purchase: Yes | Condition: New
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