Patent ID: 7850921

Claim:
A dispenser, comprising: a liquid holder configured to aspirate an amount of liquid and hold the aspirated liquid for later discharge of at least some thereof; a heater for heating the aspirated liquid held by the liquid holder to a predetermined temperature; a temperature sensor for detecting a temperature of the aspirated liquid held by the liquid holder; a heater driver configured to supply an amount of energy to the heater, which is a function of a difference between a target temperature and a temperature detected by the temperature sensor; and a controller configured to generate the target temperature for the heater driver, the target temperature being different from the predetermined temperature and a function of an aspiration amount of liquid, wherein the controller controls the operation of the heater driver so as to heat the aspirated liquid held by the liquid holder to the predetermined temperature in a time period substantially constant, regardless of the aspirated amount of the liquid, so as to heat the aspirated liquid held by the liquid holder to the set temperature for a substantially constant time period, regardless of the aspirated amount of liquid.