
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.

TDS water quality tester - TDS water hardness meter (portable digital salt meter for water analysis)
9 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― 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

π PH 1-14 Extensive Storage Testing Monitoring: Optimize Your Storage with Precise pH Level Monitoring
6 Review

Digital multimeter RGK DM-12
6 Review

Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review

π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review

π Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review