SMI has developed several types of control boxes. These include direct outputs to heaters or to power supplies. The output may be on/off or phase fired with proportional/Integrating/differentiating (PID) controllers. Manual and computer (RS) control are both optional with or without temperature read-back. Application areas include MOCVD, PLD, Sputtering, Evaporation, MOD, Sol-Gel, and so on.