... Portable Digital RefractometerIntroduction&Specifications: WZB C2 Glycol, Propanediol, Battery fluid , Clearance RefractometerThe digital display high precision optical ... urine specific gravity, serum protein, glycol, propylene glycol, battery liquid, etc.Features: Temperature measurement range: 0°C- ... 50°C(32°F-122°F) Automatic shutdown battery save function Low voltage alarmWorking life over than ...