* Control/Alarm/Monitor via GSM mobile phone, with no distance limitation.
* 8 channels RS232 input, 8 relay outputs, 8 switch inputs.
* 8 channels RS232 input can cooperate full line LUTRON instruments (build RS232 output), it will
* Real time data recorder, save the data into the SD memory card and can be download to the
Excel, extra software is no need.
* pH : 0 to 14.00 pH.
* mV (ORP) : -1999 mV to 1999 mV.
* Manual temperature compensation.