
I don’t know much about how refractors works but I changed coolant on 2 of our vehicles myself and during the process I flushed many times first with distilled water. When I added concentrated coolant I was concerned about making sure I had correct protection for the engine. I tested quickly with this refractor and it indicated I had adequate mixture. I then would test it with only water and it would calibrate down to 32 degrees as freeze point. I’m hopeful this is accurate but it seems very nice!

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

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

Digital PH Meter Tester - Tiaoyeer Water Quality Tester With ATC, 0.01PH High Accuracy, 0.00-14.00 Measurement Range, 0.01 Resolution For Drinking Water, Aquarium, Swimming Pools, Hydroponic
8 Review

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