Rotary level switch

The invention discloses a rotary level switch, which comprises blades, a motor and a sensor, and is characterized in that a rotating shaft of the blades is connected with an output shaft of the motor,there is a coupling between the rotating shaft of the blades and the output shaft of the motor, the motor is a stepping motor, the senor includes a proximity switch and an induction head, the induction head is installed on the rotating shaft of the blades between a fixing base and the coupling, the proximity switch is installed on a switch base, the switch base is fixed on a motor mounting base or the fixing base, and the proximity switch is connected with an external driver. The rotary level switch judges whether there is a material or not in a batching machine according to the counting of the sensor by combining an out-of-step phenomenon caused by blade blockage of the stepping motor, draws a conclusion according to the counting quantity and gives an alarm in time. The rotary level switch is simple in structure