Specifications
The digital refractometers are optical instruments that
employ the measurement of refractive index to determine
the % Brix of sugar (MA871), % Fructose (MA872),
% Glucose (MA873) and % Invert Sugar (MA881) in aque-
ous solutions.
The method is both simple and quick. Samples are meas-
ured after a simple user calibration with deionized or dis-
tilled water. Within seconds the instruments measure
the refractive index of the sample and convert it to
% Brix or % by weight concentration units.
The digital refractometers eliminate the uncertainity
associated with mechanical refractometers and
are easily portable for measurements in the field.
The measurement technique and temperature
compensation employ methodology recom-
mended in the ICUMSA Methods Book
(Internationally recognized body for Sugar
Analysis). Temperature (in °C or °F) is displayed
simultaneously with the measurement on the
large dual level display along with icons for Low
Power and other helpful message codes.
Key features include:
• Dual-level LCD
• Automatic Temperature Compensation (ATC)
• Easy setup and storage
• Battery operation with Low Power indicator (BEPS)
• Automatically turns off after 3 minutes of non-use
MA871/MA872/MA873/MA881
Digital Refractometers for Brix, Fructose, Glucose
and Invert Sugar Measurements
Digital
Refractometers
43
www.milwaukeeinst.com
Ordering Information
MA871, MA872, MA873 and MA881 are supplied complete with
Mi0005 9V battery and instruction manual.
Specifications
MA871 MA872 MA873 MA881
Brix Fructose Glucose Invert Sugar
Range 0 to 85% Brix 0 to 85% mass 0 to 85% mass 0 to 85% mass
0 to 80°C / 32 to 176°F 0 to 80°C / 32 to 176°F 0 to 80°C / 32 to 176°F 0 to 80°C / 32 to 176°F
Resolution 0.1% Brix 0.1% 0.1% 0.1%
0.1°C / 0.1°F 0.1°C / 0.1°F 0.1°C / 0.1°F 0.1°C / 0.1°F
Accuracy ±0.2% Brix ±0.2% ±0.2% ±0.2%
±0.3°C / ±0.5°F ±0.3°C / ±0.5°F ±0.3°C / ±0.5°F ±0.3°C / ±0.5°F
Light Source yellow LED yellow LED yellow LED yellow LED
Measurement Time approximately 1.5 seconds approximately 1.5 seconds approximately 1.5 seconds approximately 1.5 seconds
Minimum Sample Volume 100 µL (cover prism totally) 100 µL (cover prism totally) 100 µL (cover prism totally) 100 µL (cover prism totally)
Sample Cell SS ring and flint glass prism SS ring and flint glass prism SS ring and flint glass prism SS ring and flint glass prism
Temperature Compensation automatic between automatic between automatic between automatic between
10 and 40°C / 50 to 104°F 10 and 40°C / 50 to 104°F 10 and 40°C / 50 to 104°F 10 and 40°C / 50 to 104°F
Case Material ABS AB S ABS ABS
Enclosure Rating IP 65 IP 65 IP 65 IP 65
Battery Type 1 x 9V AA (included) 1 x 9V AA (included) 1 x 9V AA (included) 1 x 9V AA (included)
Battery Life 5000 reading 5000 reading 5000 reading 5000 reading
Auto-shut off after 3 minutes of non-use after 3 minutes of non-use after 3 minutes of non-use after 3 minutes of non-use
Dimensions 192 x 102 x 67 mm 192 x 102 x 67 mm 192 x 102 x 67 mm 192 x 102 x 67 mm
Weight 420 g 420 g 420 g 420 g
Stainless Steel Sample
Well and Prism
Place a few drops of the sample in
the well and press the READ key.
New