GARBAGE. You get what you pay for. I recommend investing in a more expensive pH meter as all those cheap yellow devices are junk. Above all, it was a waste of time. Distilled water and pH powder were used. This meter read 2.80 per hour in a solution of 6.86 and every time I pressed "CAL" it marked it as 4.01! I used a calibrated pH pen to check the solution and it showed 6.92 so this pen is a complete mess.
π― Honey Refractometer with Automatic Temperature Compensation (ATC) - Tiaoyeer Moisture, Brix, and Baume Refractometer for Honey, 58-90% Brix Scale Range - Honey Moisture Tester
31 Review
Digital PH Meter Tester - Tiaoyeer Water Quality Tester With ATC, 0.01PH High Accuracy, 0.00-14.00 Measurement Range, 0.01 Resolution For Drinking Water, Aquarium, Swimming Pools, Hydroponic
8 Review
π PH 1-14 Extensive Storage Testing Monitoring: Optimize Your Storage with Precise pH Level Monitoring
6 Review
TDS water quality tester - TDS water hardness meter (portable digital salt meter for water analysis)
9 Review