Digital Dissolved Oxygen Meter Backlit LCD Portable DO Tester
Range: DO Dissolved Oxygen: 0 to 199.9%, 0 to 20mg/L, Temperature: 0°C to 50°C (32°F to 122°F). Resolution: DO Dissolved Oxygen: 0.1%, 0.01mg/L, Temperature: 0.1°C (0.2°F). If you do not receive our reply within 48 hours, pls.