THIS IS THE BEST CLINICAL REFRACTOMETER FOR THE MONEY! IT MATCHES THE ACCURACY OF UNITS THAT COST 2 AND 3 TIMES AS MUCH, BUT WITH MUCH MORE CONVENIENCE! DIP. READ. DONE! ATAGO has responded to the demand for a "Dip-type" refract meter by Hospitals, Clinics, Athletic Trainers & Coaches, Drug Testing Facilities and Probation Officers nationwide. Simply Dip or Touch the sensor to the sample for quick & easy measurement of Urine Specific Gravity. The PEN-Wrestling has been specifically engineered to meet the needs of all clinical testing facilities and programs. New design developments allow the tester to perform measurements with a simple "dip and touch" motion. This dip-in model is the most convenient unit available for quick, accurate readings. The practical design is also safer and hassle-free when it comes to cleanup. PEN-Wrestling - Urine SG: 1.0000-1.0600 - Minimum Scale: 0.0001 - Accuracy: �0.0010 - Temp Compensation Range: 10 - 35� C � Light & Compact: The PEN-Wrestling allows for two types of measuring, based on sample size! - Digital Display: Easy and accurate readings, without user interpretation! - Fast & Easy: Measures in 2 seconds! - Automatic Temp. Compensation: No temperature conversion charts! - Water Resistant (Body - IP65, Prism Head - IP67): Run it under the faucet for fast and easy cleanup! - Zero-set with Water: No standard liquids required! - 8000 Measurements: From a single alkaline AAA battery!