Refractometers, hand-held, precision, MASTER-GOE
For simple, manual measurement of concentrations and refractive indices of liquids. Hand-held, precision refractometers with focussing eyepiece, soft rubber eyecups (to reduce straylight ingress, also spectacle lenses do not slip off and are not scratched), case and conversion tables. Hand-held refractometers cannot be fitted with a thermostatic controller and so measurements have to be temperature compensated.

Models with extra code M: Basic model
Models with extra code T: with automatic temperature compensation (ATC)
Models with extra code a: with automatic temperature compensation (ATC) and protection class IP65

Specifications
Type MASTER-GOE, for wine 
Measurement Range: German Oechsle : 30 to 170° , Brix : 0.0 to 40.0 % (Automatic Temperature Compensation)
Accuracy:  ±2° German Oechsle , ± 0.5 % Brix  (10 to 30°C)
Minimum scale value: 1° German Oechsle ,  0.5 % Brix
International Protection Class: IP65 (except eye piece)
Dimensions & Weight 3.2×3.4×16.8cm, 130g
Dust-tight and Protected against water jets