... now the most popular in China! Auto Refractometer AR-2000 Features:· New color LCD screen· New display and ... · The differences between AR-1000A and AR-2000 are: 1) AR-2000 has new modern design; 2) AR-1000A ... is automatic measurement, AR-2000 is manual.Specification:· Measuring Range: Sphere:-20~+20D(VD ... Southeast Asia and Africa, etc. Auto Refractometer AR-2000 optical equipment