4300 Series Controller

Dortronics Systems, Inc. announces expansion of its line of door interlock and mantrap control products to include the 4300 Series, a low-cost base model configured for standard two-door applications.  The company’s new multi-page brochure incorporates the Dortronics 4300 series along with the 4700 and 4900 series to provide customers a complete selection of door-control products ranging from simple two-door units to custom-programmable, 128-door, multifunction units.