Need a refractometer that will read glycerin based antifreeze for fire suppression. Firefight GL is the product we use. Thanks.
You can test both glycerin concentration and freeze point with the Palm Abbe digital refractometer. Model PA202-16-18 has scales for glycerin concentration by volume and glycerin freeze point in degrees Fahrenheit. Other models have scales for both glycerin and propylene glycol. Trying searching for “glycerin” in the Palm Abbe product area to find the refractometer with the scales that you need.