The Digital Hand-Held Urine Specific Gravity "Pen" Refractometer PEN-URINE S.G. utilizes the refractive index method to measure the specific gravity of urine. The PEN type refractometer is extremely easy to use. There are 2 ways to measure the sample : Dip the tip into the sample and press the START key OR press the START key and touch the tip into the sample.
Specifications
Range - Urine S. G. : 1.0000 to 1.0600
Resolution - 0.0001
Accuracy - ±0.0010
Temperature compensation - 10 to 40°C
Power Supply - 1 × AAA Batteries