Vaporizers are used to convert liquid anesthetic agents into vapor and add a controlled amount of this vapor to the fresh gas flow. The output concentration of a vaporizer can be regulated by adjusting the splitting ratio between the gas flowing through the vaporizing chamber and bypass chamber. Temperature compensation mechanisms like a bimetallic strip are used to maintain a constant output despite temperature fluctuations. Factors like gas flow rate, carrier gas composition, ambient pressure, and vaporizer design can influence the vaporizer's output concentration.