Since 1910， General Tools has grown to become the recognized industry leader for specialty hand tools and instruments. The REF312ATC provides quick and accurate indication of vital fluid levels. Its three scales display Urine Specific Gravity (SG)， Total Serum Protein (SP) and Refractive Index (RI). Made from durable materials， this refractometer comes with a built-in rubber hand grip， a cushioned eyepiece and a calibration screen.
Protein and urine range: 1.000 to 1.050 SG
Protein in serum range: 1.3330 to 1.3600R
Usable for protein and urine， blood serum， plasma and albumen
Includes a calibration screwdriver， a plastic pipette and a carrying case
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