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The GSM SMS Controller RTU5019 is a very simple programmable I/O ports (2DIN, 2DOUT, 1 PIN, 1 AIN, 1Temp. Input) and cost effective GSM RTU which can be used for data acquisition, remote switching machine, temperature monitoring, Pulse Counter, automation system and other applications.

Just dial from Authorized User number then 1 or 2 relay output will be switched ON/OFF. There are no communication costs, the GSM SMS Controller Alarm rejects the call from authorized number (Call-ID) then carries out the turn ON/OFF action.

The RTU5019 also supports interval time to report the Analog input value, Digital output status, pulse counter and temperature to the authorized numbers, and also can report the value of them while the threshold of the ultra-high----high, low ---- ultra-low occurrence.

Moreover, the RTU5019 with 2 digital inputs for digital outputs, when any one of the inputs triggered, will activate one or both of the relay outputs, in the meanwhile, the RTU5019 will send SMS Alert to owners immediately. This is very useful if you need protect your assets with low cost solution. 
In one word, the GSM SMS Controller RTU5019 is the best choice for lots of applications.

Skype:gsmrtusystem    David Wu