
Only one drip of coolant required for measurement. Dropper is supplied with the Refractometer. I checked calibration by mixing four solutions; 100%, 60%, 40% and 0%, RO Water/Polyethylene Glycol. Measurements with the Reflectometer were spot on. I recommend this product.

80 Pieces Water Test Litmus Strips Litmus ph Paper Soil Acidity Meter Liquid pH Tester 1-14
10 Review

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

π§ Enhanced Water Analysis: HM Digital HydroTester Offers Unparalleled Resolution and Accuracy
6 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₯ Advanced Testo Wireless Hot Wire Anemometer Technology
4 Review

π Dioxide Controller for Digital Gas Monitoring
5 Review