
Extremely inaccurate. Also, the top that contains the batteries was not secured and fell into the water when first used. He got hit by water and voila he's dead. I couldn't calibrate as it kept showing 0.2 even when I put it in the 4.1 buffer. Garbage.

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

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

Portable digital multimeter with sound continuity and thermocouple (electric tester) LTX DT-838
7 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§ UEi Test Instruments DAFM3B Digital Multimeter
6 Review

π‘οΈ Continuous Temperature Monitoring with Relative Humidity Integration
4 Review

π Dioxide Controller for Digital Gas Monitoring
5 Review