Click on the image to check the artwork
By certification 
Digital serum protein urine sg tester clinical refractometer DR501 Digital protein refractometer is developed for quick determination of protein in serum and urine specific gravity.as well as measuring refractive index of solution.
URINE SP. G.:1.000-1.050
SERUM P.:0.1-12.0
Refractive Index :1.3330--1.3900nD
Operation temperature:0.0~50.0 Centigrade(32.0~144.0Fahrenheit)
Power supply:1.5V battery*1
Automatic shut off
Dimensions:121 x 58 x 25(mm)
Net weight:90g (battery not included)
