A vaporizing device for consuming a stimulant or a pharmaceutical substance by inhaling a vapour comprise a housing having an exit opening provided at one end of said housing, a vaporizer connected to said exit opening via a vapour conduit, said vaporizer having an electrically driven heating unit and a liquid exposure section that is heated by the heating unit to vaporize a liquid in said liquid exposure section, a liquid reservoir connected to said liquid exposure section via a liquid conduit, and an electrical energy storage unit electrically connected to said heating unit, wherein an electrical fluid level sensor is associated with said liquid reservoir, said fluid level sensor being arranged and adapted to produce a low-level-signal if the liquid level within said liquid reservoir is below a predetermined threshold.