The main technical parameters: Light source: tungsten halogen lamp 6V, 12W Receiving element: silicon photocell Measuring range NTU: 0.00—50.0; 50.1—200; 201—2000 (automatic range switching) Reading display method: four-digit LED digital display Indication error: within 0-200NTU, no more than ±8% Within 201-2000NTU, no more than ±6% Stability of indication: ≤±0.3%FS Zero drift: ≤±1%FS Sample bottle: φ25mm×95 mm Sample volume: 20ml~30m Power supply: 220 V ±22V, 50 Hz ±1Hz Dimensions: 358mm×323mm×160mm Instrument quality: 8kg