✊【Coffee Concentration Meter】 A tester for coffee lovers to understand the coffee extraction rate, allowing you to quickly know how to adjust your brewing for reference. Additionally, coffee distributors and coffee chains can use the device for trade evaluation ✊【Coffee Purity Meter Specifications】 Bluetooth Coffee Brix Refractometer Digital Coffee Meter Smart Coffee Concentration Densitometer 0-26% Brix 0-23% TDS Meter. ✊【Bluetooth Coffee Brix Refractometer 】 Units with a large backlit screen allow you to easily and clearly see readings in low light conditions. All results are displayed instantly and visually, allowing you to quickly understand the test results ✊【 BT function】 By using the built-in BT function, the user can view the optimal extraction yield with results, plotted on a graph using the RCM-1000BTsmartphone application. ✊【Temperature Compensation Function】 The refractive index is affected by temperature, so we set up the automatic temperature compensation (ATC) function to make accurate readings at various temperatures, ensuring accuracy and consistency