T20 Wireless Gsm 3g 4g Wifi Temperature Humidity Alarm Controller Data Logger

T20 Wireless Gsm 3g 4g Wifi Temperature Humidity Sensor Alarm Controller Data Logger   T20 OptionsT20 with temperature probe   T20 with temperature humidity probe   Temperature Humidity Measurement Temperature measurement range: -40~80℃(±0.5℃)  Humidity measurement range: 0-100%RH (±5%RH@25℃) Support up to 2 temperature probes or 2 temperature & humidity probes Display OLED display screen Touch key switch menu Data Logger Wireless record to Cloud, optional cellular or Wi-Fi version Memory data storage capacity: 15000 readings Automatically data store when network connection lost Recover the stored to Cloud when connection is back to normal Thermostat Inside 3 relays Temperature and humidity high or low interlock Programmable timer relay action SMS (only cellular version support) Preset 10 authorized phone numbers Configurable alarm/recover SMS Query current value by SMS Control relay by SMS Remote setting by SMS TCP/IP connect TCP/IP connect 4 internet servers (IP or