INESA WZB-F R1 Portable digital refractometer

INESA WZB-F R1 portable urine specific gravity refractometer urine specific gravity range 1.000~1.050, serum protein range 0~12g/dl, refractive index range 1.3330~1.3900, WZB-F R1 portable urine specific gravity refractometer has automatic temperature compensation and large TFT backlight color screen.