Tanaka's 7th generation model AD-7 is an eco-friendly automated distillation tester with a built-in Peltier system which can cool and heat the condenser as well as the receiver compartment. AD-7 automatically performs distillation test of petroleum products prescribed in “Standard Test Method for Distillation of Petroleum Products at Atmospheric Pressure”, as well as narrow boiling range samples with optional temperature sensor. Just by selecting the program and setting the sample then pressing the start button, AD-7 carries out the distillation test process automatically and prints out the results by the built-in printer.