I'm currently setting up some equipment to mix and dispense windshield washer solvent into cars. The spec calls for 3 parts water to 2 parts methanol with a Specific Gravity of 0.942 nominal and a freeze point of -30 degrees Celcious (no higher). I have a digital meter that will give me the specific gravity or the density of the solution. How do I convert from SG or Kg/cu.m to a freeze point for this solution?
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Water/Methanol density vs. freeze point