... PLC. Another, it can transmit data from apparatus (thermometer, humidity meter, electric meter, flow meter) to user or monitoring center ... 9600,n,8,0,1>>Temperature: -20-+70 °C>>Humidity : Relative humidity 95% (condensation free)>>Output drive voltage: Equal to input ... to contact us. Skype: Samchinese New Upgrading,GSM SMS Controller,RTU5011,Temperature UP DOWN remote control,24V DC Switch,NC NO ...