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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About us

Symmetron was founded in 1989 by experienced engineers and evolved as a manufacturer of dataloggers and supplier of measurement equipment.

During the years, the company has developed electronic design expertise in areas such as:

- Analog and digital techniques.
- Embedded design and programming.
- Software development.
- Sensor signal conditioning.
- GSM, GPRS, Email, SMS and RF modem telemetry.
- Safe Flash memory data storage techniques.
- Non-stop operation in extreme environmental conditions.

Symmetron products find applications in:

- Wind energy assessment.
- Solar energy measurements.
- Water pipe management.
- Electrical energy measurements.
- General data acquisition and remote control.

With thousands of measurement systems deployed worldwide, clients include businesses, organizations and universities.

The company has also participated in several development programs with universities and other organizations. These range from a hybrid small grid simulator to fast photon pulsers for scientific experiments.

Symmetron is certified to the ISO9001 quality system.


Online GPRS telemetry using low-cost, dynamic IP SIM cards.
See Diameson server.

Modem for creating virtual RS-232 and RS-485 connections via the GPRS network. See Sym-o-net.

Solar data recording and telemetry via email, SMS, GPRS and GSM.
See Stylitis-10 datalogger.

Wind measurement data acquisition and telemetry via email, SMS, GPRS and GSM.
See Stylitis-50 datalogger.

Electrical quantities data acquisition (power, voltage, energy, etc.) for up to 10 incoming/outgoing 3-phase lines in substations and telemetry via GPRS and GSM.
See Stylitis-Power datalogger.

Measurements data presentation in large-screen displays.
See Apeicon.

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