An electronic vaporizer , comprising: a heating element for heating a fluid to produce a vapor; a power source to provide electrical power to the heating element for heating the fluid; and a power control circuit configured to regulate a supply of electrical power from the power source to the heating element based at least in part on an operating temperature of the heating element and a temperature setting to prevent the operating temperature of the heating element from exceeding the temperature setting, wherein the power control circuit is further configured to determine the operating temperature of the heating element based on a measured resistance, on a reference resistance, and on known temperature coefficient of resistance characteristics associated with the heating element , wherein the reference resistance is the resistance of the heating element at a predetermined temperature; and a temperature sensor operably coupled with the power control circuit , the electronic vaporizer being characterized in that the power control circuit includes a timer configured to determine the length of time since the last heating element activation period, to determine whether a predetermined time period has passed, sufficient to allow the heating element to return to an ambient temperature, and wherein the power control circuit is further configured to: apply a pulse of electrical power to the heating element , if said predetermined time period since the last full-power activation has elapsed; measure the resistance of the heating element when the pulse is applied; and set the resistance measured during the pulse as the reference resistance, wherein the ambient temperature measured by the temperature sensor is set as the predetermined temperature. a heating element for heating a fluid to produce a vapor; a power source to provide electrical power to the heating element for heating the fluid; and a power control circuit configured to regulate a supply of electrical power from the power source to the heating element based at least in part on an operating temperature of the heating element and a temperature setting to prevent the operating temperature of the heating element from exceeding the temperature setting, wherein the power control circuit is further configured to determine the operating temperature of the heating element based on a measured resistance, on a reference resistance, and on known temperature coefficient of resistance characteristics associated with the heating element , wherein the reference resistance is the resistance of the heating element at a predetermined temperature; and a temperature sensor operably coupled with the power control circuit , the electronic vaporizer being characterized in that the power control circuit includes a timer configured to determine the length of time since the last heating element activation period, to determine whether a predetermined time period has passed, sufficient to allow the heating element to return to an ambient temperature, and wherein the power control circuit is further configured to: apply a pulse of electrical power to the heating element , if said predetermined time period since the last full-power activation has elapsed; measure the resistance of the heating element when the pulse is applied; and set the resistance measured during the pulse as the reference resistance, wherein the ambient temperature measured by the temperature sensor is set as the predetermined temperature. apply a pulse of electrical power to the heating element , if said predetermined time period since the last full-power activation has elapsed; measure the resistance of the heating element when the pulse is applied; and set the resistance measured during the pulse as the reference resistance, wherein the ambient temperature measured by the temperature sensor is set as the predetermined temperature. <EOS>