Extech RF40 Propylene and Ethylene Glycol Antifreeze Refractometer Maple Sap but each unit should be

but each unit should be calibrated several times a year

Range: 0 to -64

Unit of Measure: % Volume/Volume

THIS FLUID WILL HELP YOU GET THE MOST OUT OF YOUR SALINITY REFRACTOMETER

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Extech RF40 Propylene and Ethylene Glycol Antifreeze Refractometer Maple Sap but each unit should beRF40: Portable Battery Coolant Glycol Refractometer with ATC (F) This is a USED unit Measures the freezing point of coolants and concentration of Ethylene Propylene Glycol This portable battery coolant glycol Refractometer is easy to operate refract meters provide accurate and repeatable measurements on easy to read scales. The RF40 measures the freezing point of automotive coolants (propylene glycol and ethylene glycol) and indicates the specific