Founded in 1981, Covina-based MICRO-AIDE designs and manufactures industrial-grade electronics, with a particular focus on rail-signal event recorders, alarm reporters and data loggers. Its products are developed, built, tested and supported by MICRO-AIDE staff for demanding environments ranging from high humidity and vibration to temperatures of -40C to +70C. The privately owned company also supplies flight simulator grip sets and reports that its rail products are used by transit agencies throughout North America.