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 vacation 2014
The Symmetron company will remain closed for vacation from 2 to 24 August 2014.
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New data logger operating software Opton 4!
Replace old Opton and Stylitis Explorer with Opton 4, a more user friendly software, which cooperates with all Stylitis data loggers. Some new features are the global sites and connections management, the connection assistant and the produced site messages. For more information, click here
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Digital bus sensors option in Stylitis-10
Digital bus sensors (MODBUS RTU and SDI-12) option in Stylitis-10. Conversion of the PERIPHERAL port to RS-485.
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Stylitis-10 with internal GPS module
The Stylitis-10 datalogger is also available with an internal modem with a GPS module, to receive location and time information.
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New software: Stylitis Explorer 4
Download the new version of Stylitis Explorer 4, without uninstalling the old version (3.). Versions 3. and 4. can be both installed in your computer.
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Price: FREE €

Captum is a free service which makes it easy to set up a real-time web page presenting measurements from any Symmetron data logger, which have been sent to a web database. Measurement data are available, along with plots and statistics.

- Create one site per data logger, by defining its Serial Number and Password (the password is mandatory).
- Optionally, you may also define a picture in each site, along with its position on the map, by defining its longitude and latitude.
- Each site may be public ( freely available data to open public) or private (only you can view its data)
- The data can be retrieved by developpers from the database in form of an XML file. For more information, contact us.

Enter Captum's website, in order to login, by clicking the Enter button below. You may:

- Add a site, or edit an existing site.
- View the latest data sent to the database.
- View a plot of your data, between the dates you will select.
- View data statistics per hour, per day, per day of the week and per month, between the dates you will select.
- (Only for Stylitis-10 and Stylitis-20 data loggers) View alarms in table form, along with their plots and statistics.

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



Captum datasheet


Stylitis-Power: Energy auditing and advanced monitoring data logger


Stylitis-10: Solar, wind, hydro, energy data logger and controller


Stylitis-20: Waterproof water measurements datalogger and controller


Stylitis-41: Wind Measurements data logger


Stylitis-101: Solar and wind data logger, suitable for W/T power curve analysis




Data public display




Memory Cards