ST-111 is a complete station monitoring system designed by Caltronics for monitoring, control and automation of various industrial processes. It is made up of a main monitoring unit which is composed of a combination of PLCs, HMI, its own proprietary software, I/O and other related components. It allows a quick response to any operator request, flexibility to change and expand a system in the future and it includes advanced features like alarming, data logging, recipe management, sequencing, etc. It is suitable for a variety of industrial applications, from water and wastewater treatment, to production line monitoring and process automation.