Long term experience in Autonomous Stations and production quality control

Large area arrays composed by dispersed stations are of major importance in experiments where Extensive Air Shower (EAS) sampling is necessary. In those dispersed stations, detectors that require very low maintenance and show good resilience to environmental conditions are mandatory. In 2012, our group started to work in Resistive Plate Chambers that could become acceptable candidates to operate within these conditions. Since that time, more than 30 complete detectors were produced, tested and installed in different places, both indoor and outdoor. The data and analysis presented here are mainly related to the tests made in the Auger site in real conditions, where two Resistive Plate Chambers have been under test for more than two years. The results confirm the capability to operate such kind of Resistive Plate Chambers for long time periods under harsh conditions at a stable efficiency. In the last years, Laboratorio de Instrumentacao e Fisica Experimental de Particulas and USP-Sao Carlos have led a collaboration with the aim of installing an Engineering Array at BATATA (Auger) site to learn in more detail and improve the resilience and performance of the Resistive Plate Chambers in outdoor conditions. The organization of such collaboration and the work done so far will be presented.