OTC
OTC Diesel Exhaust Fluid Refractometer
KS TOOLS
SK Hand Tool Refractometer-Optical Tester for Battery Fluid, Antifreeze and Adblue Additives
Zudoo
Brix Refractometer, Portable Digital Handheld Brix Refractometer, 0 to 55% Range High Accuracy Brix Meter, Automatic Calibration Tester, Hydrometer in Wine Making & Beer Brewing
Generic
Sugar Refractometer, Sweetness Meter High Accuracy 0-32% Range Optical Prism Filter with Dropper for Fruits Vegetables Drinks