ITEM NAME:handheld antifreeze refractometer freezing point adblue ATC photorefractomeF.U..Adblue (urea) concentration: 30% - 35% (resolution: 0.2%). Clean the straw. The freezing point of antifreeze based on propylene glycol and ethylene glycol. It can also be used to check the proportion of electrolysis in the battery and the state of use.