Reichert Refractometer Duochek (F) 137584L0 is one of the many quality laboratory and scientific ... products we have to offer at very competitive pricing. Reichert Refractometer Duochek (F) 137584L0 / ... excellent quality with an affordable price, the Reichert Refractometer Duochek (F) 137584L0 / 55611-002 ... and accurately determine freeze protection and percent concentration of engine coolants, battery ... direct readings of ethylene glycol, propylene glycol, and battery electrolyte with only a few drops ... are sealed and cannot be contaminated. Six measurement scales. No batteries or power cord required. ... Range:1.3330-1.40481.3330-1.4048 Battery Electrolyte, Specific Gravity:1.100-1.4001.100-1.400 Scale...