Hãng sản xuất: HANNA - Ý Range Turbidity 0.00 to 9.99; 10.0 to 99.9 and 100 to 1000 NTU Free and Total Cl2 0.00 to 5.00 mg/L Resolution Turbidity 0.01 NTU from 0.00 to 9.99 NTU; 0.1 NTU from 10.0 to 99.9 NTU; 1 NTU from 100 to 1000 NTU Free and Total Cl2 0.01 mg/L from 0.00 to 3.50 mg/L; 0.10 above 3.50 mg/L Accuracy @25°C Turbidity ±2% of reading plus 0.02 NTU Free and Total Cl2 ±0.03 mg/L ±3% of reading (whichever is greater) Method Turbidity Ratio Nephelometric Method (90°), ratio of scattered and transmitted light; adaptation of the USEPA Method 180.1 and Standard Method 2130 B Free and Total Cl2 adaptation of the USEPA Method 330.5 and Standard Method 4500-Cl G. The reaction between chlorine and DPD reagent causes a pink tint in the sample. Standards Turbidity <0.1, 15, 100 and 750 NTU Free and Total Cl2 1 mg/L free chlorine, 1 mg/L total chlorine Calibration Turbidity two, three or four-point calibration Free and Total Cl2 one-point calibration Light Detector Turbidity silicon photocell Free and Total Cl2 silicon photocell with 525 nm narrow band interference filter Turbidity Range Selection automatic Stray Light < 0.02 NTU Measuring Mode normal, average, continuous Light Source tungsten filament lamp Lamp Life greater than 100,000 readings Log Memory 200 records Serial Interface USB or RS 232 Environment 0°C (32°F) to 50°C (122°F); max 95% RH non-condensing Power Supply 1.5V AA alkaline batteries (4) or AC adapter; auto-off after 15 minutes of non-use Dimensions / Weight 224 x 87 x 77 mm (8.8 x 3.4 x 3.0”) / 512 g (18 oz.)