Lab Turbidity Meter Tester Turbidimeter with 0-1000NTU 0.1NTU Turbidity Solution ！！！Battery not Included During The Shipping！！！Features:This intelligent turbidimeter using light scattering principle, the calibration solution using formazine standard solution commonly used international. The utility model is a precise and intelligent instrument, which has the advantages of good linearity, accurate and reliable measurement and convenient operation. Specification:Measurement principle: 90° scattered lightMin (NTU): 0.1Measurement norm (NTU): 0~ 1000calibration point: 0NTU, 50NTU, 100NTU, 200NTU, 400NTU, 800NTU, 1000NTU Indication error: ± 8% (± 2.5%F.S)Repeatability: ≤ 0.8%Zero drift ± 0.8%F.SInstrument weight: 0.5KGOutline dimension: 210×75×70MMPower supply : DC 1.5V× 5 AA alkaline dry battery (not included)Product features: Universal type, wide measuring range, water dedicated, good stability