
Bought with calibration solution. Did the calibration. I use it to compare the tested water with the control (tap with bottled).

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

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

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

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

🔧 UEi Test Instruments DAFM3B Digital Multimeter
6 Review

🌬️ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review

🔍 Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review

Digital multimeter RGK DM-12
6 Review