This utility model proposes a refractometer detection probe, which includes a prism base, prism, lens holder, lens, heat-dissipating light guide tube, and optical fiber. The heat-dissipating light guide tube is fixedly connected above the prism base. A mounting groove is formed at the center of the prism base, into which the lens holder is inserted. The lens holder contains a lens slot and a prism slot, which are interconnected. The lens and prism are respectively mounted in these slots. A detection port is located at the lower end of the prism base. The lens holder also features a fiber-optic hole that connects to the prism slot, and the optical fiber is placed within this hole. The outer surface of the light guide tube is equipped with several heat-dissipating fins.
This utility model uses optical fiber to guide the external light source, keeping it isolated from high-temperature liquid environments, which ensures the stable operation of the light source and improves detection accuracy. Additionally, the light guide tube is equipped with heat-dissipating fins to enhance cooling performance and prevent heat conduction to the refractometer, ensuring its reliable operation.