
I love that they come with two test bottles. Sometimes it's faster than my pH pen and I mainly use it to make sure my meter's calibration is correct or when I just want to double check. It's just old school.

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

Accurate And Versatile Digital PH Meters For Food, Brewing, Hydroponics, Pools And More!
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¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review

π₯ Advanced Testo Wireless Hot Wire Anemometer Technology
4 Review

Digital multimeter RGK DM-12
6 Review

π Dioxide Controller for Digital Gas Monitoring
5 Review