T20 Temperature and Humidity SMS Alert Controller

Skype: glare.wang WhatsApp: 0086-13420971345 1- GPRS/WIFI web based display, analyse and store temperature and humidity data. 2- Receive SMS if your set temperature and humidity limits out of range. 3- Mains power failure and restore alerts 4- Once data in HIGH limit, it will switch OFF air-conditioner. Once data in LOW limit, it will switch ON air-conditioner. The temperature and humidity of refrigerator & freezers used for storage of critical goods such as medicine, vaccine