The DiFluid Coffee TDS Refractometer is highly accurate, with a precision of ±0.03% and resolution of 0.01%. It is also intelligent, with in-app guidance for Golden Cup extraction and data export. Despite its high performance, it is small and lightweight, weighing only 24 grams. Additionally, it is built to last, being dust, drop and IP67 water resistant. It is also rechargeable, with a long lasting battery life of 30 days and type-C connection. It also has an automatic temperature compensation feature between 41-113℉ (5-45 ℃) which ensures that the results are accurate under different temperature environments.