If compared with other drug delivery methods such as ingestion, vaporization provides the benefits of fast onset of pharmacological effects. Vaporizers directly deliver the extracted compounds of herbs and plants into the blood stream through lungs. Vaporizers give more accurate titration until the desired level is reached and not surpassed. This enables a steady and apposite dose. Vaporizers use an electrical element for heating, frequently attributing thermostatic temperature control. High-end models of vaporizers may cost upto hundreds of dollars. Vaporizers may be classified into three categories depending on, how they heat the material- by thermal conduction, by convention, and by thermal radiation.
In thermal conduction heating, the substance is put on a metal plate, which is heated to reveal the active compounds from it. Conduction vaporizers were the first type of vaporizers introduced in market, and these are still in use. In convection vaporizers, the material itself never touches a heating part. In its place, hot air passes through it, heating it fast and allowing the active compounds to reveal. This process of heating releases much active constituents, as compared to conduction. In radiation, process of the herb or plant is focused to bright light, by which the substance absorbs the radiant energy and its temperature increases.