... by GSM Network. This is very useful to street light control, wellhead control, BTS environment monitoring, power transmission system monitoring and other ... 11. Valve controls;12. Wellheads;13. Energy saving, street lights control;14. Tanks, temperatures, water leakage;15. Transformer stations;16. ... New Upgrading,GSM SMS Controller,RTU5011,Temperature UP DOWN remote control,24V DC Switch,NC NO sensor ...