HOBOS HOneyBee Online Studies


Options without Registering

First and foremost, it makes sense to select the preliminary settings: with respect to the temperature, the user can choose from among:

  •  The first bee space
  •  The second bee space
  •  The third bee space of the honeybee hive (in °C)
  •  The arriving and / or departing flights of the honeybees (in units)

HOBOS users can find out how high the air temperature is (in °C) in the vicinity of the hive via the charts of the weather station. These charts can also be selected in the settings. If you have decided to conduct your own analysis, then you can adopt the values from the charts and create a special graph for further investigations.

The time period can be selected and restricted as desired via the blue corner points of the time axis, which can be found below the graph, and extends until the current date. The user can select a particular day or even a particular hour - anything is possible! Now you can even zoom in on certain values in order to allow for a more exact investigation. The values for the air temperature can now be set in corrolation with the arriving and departing flights of the bees or with the temperature in the bee spaces inside the hive. Many different types of questions are possible!

You can gain access to even more extensive options by registering!

Options with Registration

Whoever registers via My HOBOS will have further options available for attaining many additional measurements from inside the bee hive and from its surroundings, and can also learn how those values relate to one another.

The following values are provided from inside the bee hive:

  • Temperature values of the air in eleven bee spaces (in degrees Celsius)
  • Temperature at the front and back side of the hive (in degrees Celsius)
  • Overall weight of the hive (in grams)
  • Air temperature (in degrees Celsius)
  • Humidity (%)
  • Arriving fligths (number of bees per minute)
  • Departing fligths (number of bees per minute)

The following values are provided from the surroundings of the HOBOS colony:

  • Air pressure (mbar)
  • Air temperature (in degrees Celsius)
  • Humidity (%)
  • Atmospheric electrical field (V/m)

The fluctuations of the electrical field occur extremely rapidly (like when lighting strikes), thus their strength can only be captured with a very high temporal resolution (based on the so-called Nyquist–Shannon sampling theorem). HOBOS offers this resolution for its primary data collection. However, the selection of the time axis in HOBOS graphs influences the height of the displayed pulses. As the time grid becomes less and less exact, the extremely fast changes become more likely to fall between the dot pattern and the peaks become more likely to be displayed smaller than they really are. If the time axis only contains one day (24 hours), then the puls height will be depicted accurately. As the time axis becomes more and more compressed, the pulse heights that are returned become smaller and smaller, erroneously so. This aspect applies accordingly for other measuring parameters as well. Thus, the precipitation value shown on the vertical axis refers to a different time interval depending on whether the time axis is extended or compressed (e.g. mm/12 min, mm/30 min etc.).

  • Precipitation (mm/time interval)
  • Leaf wetness (kOhm)



The leaf wetness returns the state of the vegetation/leaves with respect to their surface wetness. The wetter the leaf surface the lower the electrical resistance measured by the leaf wetness sensor; the drier the leaf surface the higher the resistance measured.

  • Wind direction (degrees)
  • North: 0 and 360 degrees; east: 90 degrees; south: 180 degrees; west 270 degrees
  • Wind velocity (m/s)
  • Sunlight (watt/m2)




The sunlight is the overall power of the electromagnetic energy that reaches the Earth, with respect to the size of an area. It is generally measured in watts per square meter.

  • Soil moisture, multiple sensors at various locations (%)