... , frequency control;2) Mechanical seal;3) Stirring speed: stepless speed regulation;4) Two-gear six flat-blades stirrer2 Air ... , electromagnetic valve water inflow cooling4 Rotation Speed Control4.1. Variable-frequency stepless speed control4.2. Control accuracy: ±1rpm5 ... Real-time monitoring of indexes such as fermentation temperature, rotation speed, PH, DO, etc.; PLC real-time data processing; ...