In the present invention, disclosed is a steam generator. A steam generator according to the present invention is characterized in that: water inlets of a main tank in which a heater is embedded and an auxiliary tank in which a water level sensor is embedded are connected through a common connection pipe outlets of the main tank and the auxiliary tank are separately formed and each of water level measuring optical sensors is installed on the main tank and the auxiliary tank. Accordingly, a steam generator according to the present invention prevents lime components from having an effect on a water level sensor within an auxiliary tank by performing an operation of heating a heater of the main tank, and then evaporating water such that the lime components contained in water is flown into the auxiliary tank during the generation of steam. Further, the steam generator is capable of measuring water levels based on a water level of the auxiliary tank and effectively prevents a drop in a function of adjusting a water inflow amount due to the measurement of the water levels by removing a physical contact of the steam generator with the main tank and the auxiliary tank during the measurement of a water level within the main tank and the auxiliary tank.COPYRIGHT KIPO 2016본 발명은 스팀발생기를 개시한 것으로, 이러한 본 발명은 히터를 내장한 메인탱크와 수위센서를 내장한 보조탱크의 물 유입측은 공용의 연결관으로 연결하되, 메인탱크와 보조탱크의 배수측은 분리 구성함은 물론, 메인탱크와 보조탱크에 각각 수위 측정용 광학센서를 구성한 것이며, 이에따라 메인탱크의 히터 가열동작으로 물이 증발되어 스팀 발생시 물에 함유된 석회성분이 보조탱크로 유입되어 보조탱크내의 수위센서에 영향을 미치는 것을 방지하고, 메인탱크와 보조탱크내에서 수위측정시의 물리적 접촉을 없애면서 보조탱크의 수위를 기준으로 하는 수위측정은 물론, 그 수위측정에 따른 물 유입량 조절 기능이 저하되는 것을 효과적으로 방지한 것이다.
