... meter, electric meter, flow meter) to user or monitoring center by SMS(GSM DTU). (The Different from RTU5010 is the GSM Controller ... and other applications. RTU5011 I/O interface>>>>>GSM Controller RTU5010/RTU5011 suitable for: 1. Security Alarm System ... GSM SMS Alarm, GSM SMS Controller, GSM Home Automation system, Industrial Remote Controller, GPRS RTU Data Logger, GSM Telemetry, Temperature ...