Fahrenheit Antifreeze Battery Plastic ABS Hand-held Refractometer P-RHA-600ATCblue Measuring Range: Ethylene Glycol: -70'C-0'C(-90'F-32'F) Propylene Glycol: -60'C-0'C(-70'F-32'F) Battery Fluids:1.100-1.400sg Resolution Factor: 5'C, 10'F,0.01sg, (ATC)Temperature Compensation Range:10'C--30'C(50'F to 86'F)