vacuum stirrer according to the invention, the sensor and the magnet, the main body having a control means for using a signal from the magnetic sensor controlling the operation of the stirring motor and the vacuum pump Coupled to the lower opening is coupled with the drive shaft of the stirring motor was stirred through the coupling unit of the main body portion As being combined or separated in the coupling section wherein the stirring unit, the stirring vessel, and a cover coupled to the upper end of the stirring vessel, the stirring shaft penetrating through the lid, in a circumferential direction around the agitating shaft to the upper surface of the cover and concavely shaped and surrounds as being installed in the flow path the exhaust hole is formed, the cover to the bottom axis of the stirring between the agitation axis and the flow path includes a stirring unit having a magnet, wherein the magnet sensor wherein the stirring unit when coupled to the stirring unit coupling portion characterized in that located in the upper portion of the magnet. According to the present invention, since the magnet sensor installed on the main body is determined whether or not the combined stirring unit to recognize the magnet installed on the stirring unit can be prevented from being lowered in the vacuum suction efficiency due to the agitation unit formed through ball bonding portion. In addition, there is an advantage that since the operator to recognize the naturally a magnetic sensor in the course of magnetic coupling to the drive shaft axis stirred operator is used in combination to improve ease of stirring units do not need to consider the position of the sensor.본 발명에 따른 진공 교반기는, 자석센서와, 상기 자석센서의 신호를 이용하여 교반모터와 진공펌프의 동작을 제어하는 제어수단을 구비하는 본체 상기 본체의 개구된 하부에 결합되고 교반모터의 구동축이 관통 결합된 교반유닛결합부 상기 교반유닛결합부에 결합 또는 분리되는 것으로서, 교반용기와, 상기 교반용기의 상단에 결합된 덮개와, 상기 덮개를 관통하는 교반축과, 상기 덮개의 상면에 상기 교반축을 중심으로 원주방향을 따라 오목하게 형성되고 바닥에 배기공이 형성된 유로와, 상기 덮개에 설치되는 것으로서 상기 유로와 상기 교반축의 사이에서 상기 교반축을 둘러싸는 자석
