The AR4 determines the refractive index between nD 1.3000–1.7200 and the sugar content in the range of 0–95 %Brix of liquid, viscous as well as solid samples. Dry substance content in % and the dispersion value nF-nC can be calculated.

• Measurement of liquid, viscous and solid samples, regardless of their turbidity, viscosity, transparency and absorption
• Suitable for the measurement of foils and solids
• Large measuring range of nD 1.3000-1.7200 and 0-95%Brix, scale manually adjustable
• Reading the measured values via an eyepiece
• Robust housing and easy handling
• With thermostat connections that allow for the temperature control with an external thermostat

Temperature control range 8-35 °C- The electronic circulating thermostat with Peltier element is a versatile and powerful device for controlling the temperature of refractometers and polarimeters. It is extremely robust, compact and easy to use. Due to its small size, it requires little space in the laboratory.

• Measurement of liquid, viscous and solid samples, regardless of their turbidity, viscosity, transparency and absorption
• Suitable for the measurement of foils and solids
• Large measuring range of nD 1.3000-1.7200 and 0-95%Brix
• Electronic evaluation of the measured data
• Integrated thermometer
• Automatic temperature compensation for the Brix scale can be optionally activated
• Connections for temperature control with a circulating thermostat
• Robust housing and easy handling
• Serial interfaces for PC or printer (RS-232, RS-422)

The PT80 circulation thermostat is often used for the sample temperature control of Refractometer AR2008. The Abbe refractometer AR2008 can achieve highly accurate and extremely reproducible measurement results completely independent of the ambient temperatures. PT80 circulation thermostat is extremely small and can be very easily connected to all water-temperable refractometers.