Atago PAL-91S digital coolant Refractometer.

Easily measure the concerntration and freezing pointy of coolant in brine and other agents of Ethylene Glycol.

Antifreeze solution (coolant) whose main ingredient is ethylene glycol, is widely used as mixed in cooling water of car's radiator, as cooling medium for air conditioning system, freezer, refrigerator, cooling coil, cooling fixture etc. The higher the concentration is, the lower the temperature at which ethylene glycol is frozen is. Therefore, it is needed to adjust freezing temperature of antifreezing solution so that it dose not freeze under a specific operation temperature. For Prolylene Gycol measurment, please choose model PAL-88S instead.


  • Scale: Ethylene glycol % (V/V)
              Freezing point of E.G. (゚C)
              Sample Temperature (
  • Resolution: Ethylene Glycol: 0.2% (V/V)
                       Freezing point of Ethylene Glycol: 1゚C
                       Sample Temperature: 0.1°C
  • Accuracy: Ethylene glycol: ±0.4 % (V/V); Freezing point: ±1゚C
  • One touch measurement
  • Zero calibration with water
  • 0.3ml sample requirement for measuring
  • 3 second result time
  • Automatic temperature compensation
  • Battery operated (2 x AAA. Approx 11,000 measurements)
  • Compact and lightweight for portability




Brand Atago

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