Both the upper and lower jaws of the Presto Heat sealer are heated separately with separate temperature sensors and controllers. Thus, it is possible to maintain both jaws at different temperatures. It is even possible to switch off one heater, while keeping the other on.

The Presto Heat sealer is fitted with a special Imported P.I.D. Logic Temperature Controller for highest levels of control and reproducibility. There is also a provision for adjusting the dwell time from 0.0 to 9.9 seconds. (Digital Display / Microprocessor based)