GPR 12-70E Refractometer

Technical Specifications


Refractive Index (RI), Brix, Temperature corrected Brix, 10 user programmable scales and user programmable temperature corrected RI scale
RI 1.32 to 1.70, Brix 0 to 100%
User selectable, 0.0001 or 0.00001 RI, 0.1 or 0.01 Brix .
± 0.0001 RI, ± 0.1 Brix
589nm, precisely defined by narrow band optical interference filter
Readout time:
User selectable, continuous update approximately second or average over several readings for improved stability; single scan with user programmable delay or automatic stability mode (reads only when stable)
Sample temperature control range:
5°C below ambient to 100°C
Temperature control:
Internal Peltier cells to prism and presser
Temperature setting:
Digital, via the keypad
Temperature readout:
Continuous display of both set temperature and actual sample temperature to 0.1°C
Temperature accuracy:
Between ± 0.1°C and ± 0.5°C
Prism material:
Synthetic sapphire
Backlit graphic display LCD panel, main digits 8mm tall
Light source:
Special feature:
Touch button selection of normal or emulsion type sample
Memory storage:
Up to 100 readings (Re-write more than 4,000,000 times)
Data Outputs:
Reading, scale, temperature, time, date, instrument serial number and/or sample number (user selectable), automatic timed print function
2 x RS232 for printer or computer, 1 x remote operate/bar code input
Power requirements:
86 to 265V AC, 47 to 63Hz less than 40 watts
Refractometer w 235 x d 260 x h 255 mm Weight: 6.8 Kg
Power supply w 80 x d 175 x h 60 mm Weight: 0.8 Kg
500 x 400 x 350 mm Weight: 10.5 Kg

Product Information

The GPR 12-70E is a general purpose model, specially designed to measure the Refractive Index (RI) or Brix of samples of a wide range of temperatures from about 20°C upwards and is especially suited to high temperature measurements up to 100°C.

Temperature control is by internal solid state Peltier cells and so there is no need for a separate thermocirculator. Even when the sample is 100°C, the sample cover remains cool to the touch. Removing the need for a thermocirculator saves a significant amount of bench space, reduces maintenance problems, provides a safer system as there are no pipes carrying hot fluids and removes the uncertainty in temperature between the external device and the actual sample temperature.

The GPR 12-70E refractometer has Peltier cells located below the prism and also above the sample presser, ensuring all round temperature control. It is essential to control the sample cover as well as the prism to obtain accurate, uniform, sample temperature in the widest range of ambient conditions.