A free service to present real-time and historical data of Symmetron data loggers on the World Wide Web, with plots and statistics for each measuring station.

For more information about Captum service, click here.

For a free demonstration, click the Enter button below and login as a visitor, with user name Symmetron. View the site named Office Temperature



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Symmetron will be closed for summer vacation from August 3 to August 21, 2015. Thank you for your cooperation.

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Symmetron Sensors

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Temperature/ Humidity Sensors


Barometric Pressure Sensors


Anemometer/ Wind Vane Signal Converters


Wind vane verification and calibration


Position and Tilt sensors


Pyranometer Signal Converters