
So inaccurate as to be utterly useless. Even after making several solutions of known pH in the strips, they did not change color at all. The only thing I can do to make them stain is put them in a stock solution that's obviously out of range for the test strips.

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

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

Accurate And Versatile Digital PH Meters For Food, Brewing, Hydroponics, Pools And More!
7 Review

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

π‘οΈ Continuous Temperature Monitoring with Relative Humidity Integration
4 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

π₯ Advanced Testo Wireless Hot Wire Anemometer Technology
4 Review