The Model PU-ATC is a new temperature compensated (ATC) serum protein/urine refractometer, which gives a three-scale reading of 0-12 g/100 mL serum protein, 1.000 to 1.050 urine specific gravity, and 1.3330 to 1.3600 refractive index. All three scales can be easily read to a high degree of accuracy.
    The unit maintains its calibration with the ATC function built into the unit. If the unit has to be recalibrated or checked for accuracy, a drop or two of distilled water is placed at 20°C (room temperature 68°F) on the prism and the secondary cover is closed. When held up to the light, the scale should read 1.333 R.I. If it does not read 1.333 R.I., the user turns the adjustment screw until that reading is achieved on the critical line.
    The refractometer allows for speedy and accurate determinations for protein concentration of a blood serum, plasma, or any protein serum (eg albumin solutions). Urine specific gravity readings are easily obtained, as well as direct readings in refractive index, giving the user measurements of concentrations in a variety of solutions. The unit weighs 8 ounces and is approximately 6-1/2" long.
Kernco Instruments Co Inc
www.CLPmag.com