
Everything is great. Why they didn't see fit to include some sort of calibration formula to calibrate the pH meter is a real inconvenience. They don't tell you none of them are included, so you can order a few of them at once so you can start using the meter right away without having to wait days for the calibration powder to arrive. Shouldn't be too expensive. It would also be nice to have more detailed instructions for every 3 meters.

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

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

Efficiently Test Your Antifreeze And Battery Acid With A 3-In-1 Refractometer
18 Review