Across International ECO 150°C 3.2 CF Vacuum Oven with Heated Shelves & LED LightWith Ai internal shelf heating technology, each shelf in these ovens has its own heater, in shelf temperature sensor and temperature controller, together with great thermal conductive aluminum and our new low proportional controller technologies, the result is perfect uniformity, accurate temperature, super fast heating rates, minimum heat loss exterior temperature and very low power consumption. Every one of our vacuum ovens goes through a 2 time 24