A vaporizing device for consuming a stimulant or a pharmaceutical substance by inhaling a vapour, comprising: - A housing, incorporating ∘ An exit opening is provided at one end of said housing, ∘ A vaporizer (20; 220), connected to said exit opening via a vapour conduct, said vaporizer having an electrically driven heating unit and a liquid exposure section which is heated by the heating unit to vaporize a liquid in said liquid exposure section, ∘ A liquid reservoir (10; 210), connected to said liquid exposure section via a liquid conduct, ∘ An electrical energy storage unit electrically connected to said heating unit, Characterized by an electrical fluid level sensor 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, Wherein said liquid level sensor comprises at least one semiconductor element, wherein said liquid level sensor is adapted to determine a resistance of said semiconductor element and to output said low-level-signal depending on said resistance falling below a predetermined minimum threshold or rising above a predetermined maximum threshold, wherein said semiconductor element is electrically connected to said electrical energy storage unit and is supplied with electrical energy. - A housing, incorporating ∘ An exit opening is provided at one end of said housing, ∘ A vaporizer (20; 220), connected to said exit opening via a vapour conduct, said vaporizer having an electrically driven heating unit and a liquid exposure section which is heated by the heating unit to vaporize a liquid in said liquid exposure section, ∘ A liquid reservoir (10; 210), connected to said liquid exposure section via a liquid conduct, ∘ An electrical energy storage unit electrically connected to said heating unit, Characterized by an electrical fluid level sensor 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, Wherein said liquid level sensor comprises at least one semiconductor element, wherein said liquid level sensor is adapted to determine a resistance of said semiconductor element and to output said low-level-signal depending on said resistance falling below a predetermined minimum threshold or rising above a predetermined maximum threshold, wherein said semiconductor element is electrically connected to said electrical energy storage unit and is supplied with electrical energy. ∘ An exit opening is provided at one end of said housing, ∘ A vaporizer (20; 220), connected to said exit opening via a vapour conduct, said vaporizer having an electrically driven heating unit and a liquid exposure section which is heated by the heating unit to vaporize a liquid in said liquid exposure section, ∘ A liquid reservoir (10; 210), connected to said liquid exposure section via a liquid conduct, ∘ An electrical energy storage unit electrically connected to said heating unit, Characterized by an electrical fluid level sensor 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, Wherein said liquid level sensor comprises at least one semiconductor element, wherein said liquid level sensor is adapted to determine a resistance of said semiconductor element and to output said low-level-signal depending on said resistance falling below a predetermined minimum threshold or rising above a predetermined maximum threshold, wherein said semiconductor element is electrically connected to said electrical energy storage unit and is supplied with electrical energy.