Portable refractometer Oe 0-190 (2 Oe), KMW(Babo) 0-38 (0,5 KMW),Brix 0-44% (0,5Sealing film made of polyolefines and paraffin waxes. Service temperature from 45 C up to +50 C (melting point +60 C). Resistant to saline solutions, most common inorganic acids and bases used in laboratory and some organics solvents (methanol, ethanol and 2 propanol). Not resistant to diethylether, chloroform, carbon tetrachloride, benzene or toluene.