Dissolved Oxygen Meter à¤Ã×èͧÇÑ´ÍÍ¡«Ôਹ Dissolved Oxygen / Temperature HI9146-04 HI 9146 is a water-resistant, microprocessor-based, Dissolved Oxygen meter with automatic temperature compensation (ATC). D.O. measurements can be displayed in parts per million (ppm=mg/L) or in % of saturation. The temperature range is indicated in Celsius from 0 to 50°C with 0.1 resolution. This meter also allows manual compensation of altitude and salinity values.The polarographic probe, supplied with the instrument, is provided with a protective cover for the membrane. A HOLD button allows the user to freeze readings on the LCD. HI 9146 can be powered with batteries (with low battery indicator) or through a 12 Vdc adapter. Range O2 0.00 to 45.00 mg/L Range % Saturation O2 0.0 to 300.0% Range Temperature 0.0 to 50.0°C Resolution O2 0.01 mg/L Resolution % Saturation O2 0.1% Resolution Temperature 0.1°C Accuracy O2 ±1.5% F.S. Accuracy % Saturation O2 ±1.5% F.S. Accuracy Temperature 0.5°C Calibration automatic, in air, at 100% Temperature Compensation automatic, 0 to 50°C (32 to 122°F) Altitude Compensation 0 to 4 km (resolution 0.1 km) Salinity Compensation 0 to 80 mg/L (resolution 1 g/L) Probe HI 76407/4F with 4 m cable Power Supply 4 x 1.5 AA batteries / approx. 200 hours of continuous use; auto-off after 4 hours of inactivity; or input for 12 Vdc power adapter Environment 0 to 50°C (32 to 122°F); RH max 100% Dimensions 196 x 80 x 60 mm (7.7 x 3.1 x 2.4") Weight 500 g (1.1 lb.) Dissolved Oxygen DO Meter Hanna HI9146-04 Water Quality Meter à¤Ã×èͧÇÑ´ DO à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾¹éÓ à¤Ã×èͧÇÑ´»ÃÔÁÒ³ÍÍ¡«Ôਹ㹹éÓ