the present invention provides for improved liquid vaporizer systems and methods for their use . vaporizer systems of the present invention are likely to be particularly useful for the vaporization of liquids having a relatively low vapor pressure , such as tdmat . in one preferred embodiment , a liquid vaporizer system includes a vaporizer unit having first and second inlets and an outlet . the vaporizer system further includes a vessel having an inlet and an outlet , whereby the vessel inlet is operably connected to the vaporizer outlet . the vessel contains a plurality of passages which operably connect the vessel inlet and the vessel outlet . in this manner , liquids and / or gases flowing into the vaporizer unit through either or both of its two inlets , exit the vaporizer unit outlet and enter the vessel inlet . liquids and / or gases pass through the plurality of passages and exit the vessel outlet . in this manner , heating vaporizer unit and vessel to desired temperatures results in the vaporization of the liquid , such as liquid tdmat .