Profile: Master Control Systems, Inc. is a producer of fire pump controllers, battery chargers, and industrial control products. We manufacture fire pump controllers for fire sprinkler systems. Our line of industrial control panels includes pumping panels for duplex, triplex and variable speed applications. We provide an automatic mode switching, float-equalizing battery charger, a manual mode switching battery charger and an economical semi-float battery charger. We also offer UL listed simplex, duplex and triplex motor controllers. They are designed to automatically start and stop pump-motors in a variety of applications including booster, waste water, and storm water by-pass pumps.