1. Alert Alarm 1127 W 81st Ave, Merrillville, IN 46410 Coordinate: 41.47043,-87.35058 Phone: (219) 240-1188
2. Illiana Instrumentation Inc 3218 E 84th Pl, Merrillville, IN 46410 Coordinate: 41.46485,-87.29511 Phone: (219) 942-5588