S500 GSM Alarm Temperature and Humidity Data Logger

S520 GSM data logger was designed to monitor temperature & humidity with capability to send alarming message to phone numbers set up by customers when temperature data is out of pre-definded limits; and will send good message when data is back within pre-defined limits. In addition,customer can get real-time data message by calling phone number in the logger. This series use original sensor is imported from America or Switzerland, has high accuracy and stability. The user can also calibrate the instrument by deviation.