
Sorry for the bad video quality. left f2 from October 14th. right f1 started today 28th November. on the left is pure vinegar. Test strips of the same color for both. These strips don't work.

Portable digital multimeter with sound continuity and thermocouple (electric tester) LTX DT-838
7 Review

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