GSM loggers
Wireless interface converters (WPI) are designed to organize the exchange of information between remote devices. The devices allow transmitting / receiving data in half-duplex mode. Optimally suited for ModBus RTU protocol operation.
Alarm meters / indicators with GSM-logger function (I4l-GSM, I8l-GSM, I16l-GSM, I32l-GSM)
Price range: $349 through $421