Product Group Specifications
Instruction Manual
Instruction Manual

MA888 Digital Refractometer for Ethylene Glycol Measurements

The MA888 is an optical instrument that employs the measurement of the refractive index to determine the % volume and freezing point of ethylene glycol based coolants or antifreeze. The digital refractometer eliminates the uncertainty associated with mechanical refractometers and is easily portable for use in the field to optimize your cooling system.

The MA888 refractometer is an optical device that is simple and quick to use. Samples are measured after a simple user calibration with steam distilled water (starter bottle provided with your unitdeio). Within seconds, the refractive index and temperature are measured and converted into one of two measurement units; % Volume or Freezing Point. The instrument utilizes internationally recognized references for unit conversion and temperature compensation for ethylene glycol solutions (e.g. CRC Handbook of Chemistry and Physics, 87th Edition).
The temperature (in °C or °F) is also displayed on the large dual level display along with helpful message codes.

Key features include:
• Waterproof models offers IP65 waterproof protection
• Automatic Temperature Compensation (ATC)
• Battery operation with Low Power indicator
• Automatically turns off after 3 minutes of non-use.

Stainless Steel Sample Well and Prism
Place a few drops of the sample in the well and press the READ key.

Liquid Cristal Display (LCD)
Dual Level LCD with Primary and Secondary Display


0 to 100% Volume
0 to -50 °C / 32 a -58 °F Freezing Point
0 to 80°C / 32 to 175°F


0.1% Volume
0.1°C / 0.1°F Freezing Point
0.1°C / 0.1°F

Accuracy ±0.2% Volume
±0.5°C / ±1.0°F Freezing Point
±0.3°C / ±0.5°F
Light Source Yellow LED
Measurements Time Approximately 1.5 seconds
Minimum Sample Volume 100 µL (cover prism totally)
Sample Cell SS ring and flint glass prism
Temperature Compensation Automatic between 10 and 40°C / 50 to 104°F
Case Material ABS
Enclosure Rating IP 65
Battery Type 1 x 9V AA (included)
Battery Life 5000 reading
Auto-shut off after 3 minutes of non-use
Dimensions 192 x 102 x 67 mm
Weight 420 g

Mi0005 9V battery (1 pc)
MA888 instrument is supplied with:
• 9 V battery;
• Instruction manual.