... street light control, wellhead control, BTS environment monitoring, power transmission system monitoring and other applications. RTU5011 I/O interface>>>>>GSM Controller ... Corrosion protection;11. Valve controls;12. Wellheads;13. Energy saving, street lights control;14. Tanks, temperatures, water ... New Upgrading,GSM SMS Controller,RTU5011,Temperature UP DOWN remote control,24V DC Switch,NC NO sensor ...