• completely independent temperature and humidity monitoring system
  • temperature measurement from -100°C to +100°C
  • data delivery to FTP server
  • e-mail alarm
  • backup battery
  • two digital sensors of temperature and relative humidity

RhT Web Monitor is a telemetry device designed for control and monitoring of temperature and relative humidity.

The device can be used as stand-alone unit or more devices as a system, in combination with a web application. Devices can be centrally linked regardless of the distance (e.g. other building, street, city, country or continent).

GSM/GPRS communication and backup battery make it independent of existing infrastructure and immune to the excesses of the existing electricity network. Because of the low power consumption it can be powered by the solar panel or other alternative power sources.

For measuring device it uses high-precision sensors of the renowned manufacturer Honeywell, shows the minimum, maximum, medium, current temperature and MKT (Mean Kinetic Temperature) for defined period.

The device also has two digital IO inputs that can be used to detect a variety of events (e.g. open doors, unauthorized opening of cabinets…).

The data is periodically sent in XML format to a remote server (FTP). Due to the simple structure of the data, device can be easily integrated into existing control systems and databases.

Alarms are sent by e-mail on to the three predefined e-mail addresses.


Measurement, logging and monitoring of temperatures:
– in pharmacies, refrigerators, freezers, incubators, medicine warehouses
– in the production and storage of food products
– in various warehouses and facilities that require continuous monitoring and logging of temperature and humidity
– wherever there is a need for constant and continuous automatic temperature monitoring

Technical Data

Power supply:
Supply voltage : 12V 1A
Consumption : 3.5Wh
Backup battery : 3400 mAh

Data delivery : every 10 min, 30 min, 1h
Data format : XML
Delivery of data to a remote server (FTP server)

Temperature : from -100 to +100°C , max error +- 0.5°C
Relative humidity : from 0 to 100%, max error +-5%

Digital inputs:
Max input voltage : 15V
Max capacitive input load : 100 nF

Download PDF

RhT Web Monitor GWM-2RH2T2D -ENG