Qingzhou Yongsheng Machinery Co.,Ltd is one of the professional China environment control panel manufacturers and suppliers,Website:http://www.qzys-exhaustfan.com, welcome to wholesale low price environmental control instrument from our factory.Main features：Input:One Humidity Sensor (4-20mA).Two 4-20mA Standard Interfaces (Spare).Two Digital Input Interfaces (Pulse Meter Connection Available).Five Temperature Sensors (P5 available for outdoors use)Output:Two Groups of Variable-speed Fans.Eight Groups of Constant-speed Fans、Two Groups of Cooling System.Two Group of Heaters .Alarm Controlling Signals、Feed line control.Ventilation Inlets Opening Size Control.Automatic Side Curtain Control System、Lighting Control.One 0-10V Standard Interface (Spare).A Group of Power Output (Hot Lamps control)Feature:1. Feed weighing and measuring2. Specific switching mode between cross ventilation and tunnel ventilation3. High/low temperature alarm, Defective temperature probe alarm4. Temperature curve function, Minimum ventilation curve function5. Humidity compensating control, Outdoor temperature compensating control6. Able to control the automatic curtain system and ventilation inlets  simultaneously7. Minimum ventilation timer, variable-speed curve8. Possibility of computer connection.9. IP65 waterproof enclosure, size: 380*280*130mm10. Unique fan start up protection to avoid current overloaded when fans turn on simultaneously11. Sixteen-stage controller, controlling the variable-speed fans, constant-speed fans, heaters, cooling system, etc.12. Up to 600 days’ record of data, including daily livestock population, mortality rate, water-feed ratio, feed conversion rate, drinking volume, etc.