Evaporation measuring device consisting of: a stainless steel cone-shaped sieve 60 mesh, a200 ml tall form beaker, cover fitted with gasket and crane hookfor the Stainless steel oil bath with insulated double wall, cover withtwo holes for evaporation cells, two flowmeters. stainlesssteel control box on the cover, temperature controlled bydigital thermoregulator PID with PT100 probe class A andovertemperature alarm, stainless steel heater, motor stirrer,safety internal level for low liquid with warning lamp.