Evans Coolant Refractometer

This Evans Cooling Refractometer is designed to accurately test for residual water content. By determining the water content, you'll be able to safely set up your cooling system with Evans Cooling products.

• Fast, simple optical method.
• Requires only 1 drop of coolant.
• Compare optical reading to water content chart .
  • Calibrate the refractometer by placing a drop of new Evans Waterless on the refractometer glass. Use the small screwdriver supplied with the instrument to turn the calibration screw until the boundary between the upper blue field and the lower white field meet at 57.0.
• Always clean the glass and the daylight plate with a clean, soft cloth after each use and before each reading. Do not place under running water or submerge the instrument while cleaning. Store the unit in its original case in a cool, dry area.
• Place a small amount of coolant, obtained from a location in the cooling system where the coolant is well mixed, on the glass and close the daylight plate.

Ideal is 3% or 55.7 BRIX; acceptable is 5% or 54.8 BRIX. Vehicle may be driven with water content 7% or higher – technical intervention is strongly suggested to bring water content into recommended range for optimal performance.

Readings are temperature sensitive, so calibrate before each use: