The MASTER-URC/NM is designed to quickly and easily measure Urine Specific Gravity with just a single drop of sample. The new plastic body design is resistant against corrosion from salty and acidic samples, and incorporates an improved optics system for higher contrast and better clarity. Simple to use, lightweight, and portable! The MASTER-URC/NM is a good alternative choice when the water resistant feature is not a priority and the Temperature Compensation will be carried out manually.