Portable Battery Coolant/Glycol Refractometer with ATC (°F)
Measures the freezing point of coolants and concentration of Ethylene/Propylene Glycol
Measures -60 to 32°F Propylene/Ethylene Glycol freeze point and 1.11 to 1.30 Specific Gravity of Battery Acid
Automatic Temperature Compensation (ATC)
Requires only 2 or 3 drops of solution
The prism and lens with a simple focus adjustment
Complete with case, calibration screwdriver, plastic pipette and calibration solution
datasheet: http://www.extech.com/instruments/resources/datasheets/RFSeriesdata.pdf