Globe Scientific Instruments Digital Clinical Flame Photometer Model No. 039-G is a dual-channel instrument, which is used for simultaneous observation of sodium (Na) and potassium (K) in blood serum (plasma), urine, and other types of biological fluids. Calcium and lithium filters are optional. It measures two elements simultaneously and shows the result on a dual 2 Digit LED display. The Measuring Range of VSI-FP2 is Sodium (Na) : Serum 0-200 meq./l, Urine 0-200 meq./l & Potassium (K) : Serum 0-10 meq./l, Urine 0-100 meq./l with an Accuracy of +-2% upto 100 meq./l and +-5% above 100 meq./l. Narrow band interference glass filters of Na & K are used. An oil-free mini compressor unit with a pressure regulator is supplied along with the main unit.