Measuring parameters
Air Temperature and Air Humidity
RFT-2 sensors, protected from rain and direct solar radiation by ventilated weather housings, are used for measuring air temperature and air humidity.
Specifications:
- measuring range, air temperature: -30 - 70°C
- measuring range, air humidity: 0 - 100%
Hardware for MODOEK Controlling and Data Collection
Controlling and data collecting hardware by Real-Time Hypervisor, National Instruments.
Software for MODOEK Controlling and Data Collection
Controlling and data collecting software by LabVIEW, National Instruments.
Water Potential
A Scholander bomb is available for measuring water potential in needles, leaves and twigs.
Specifications:
- measuring range: 0 - 40 bar
- pressure chamber: 12.5 x 6.25 cm
- adapter for needles, leaves and twigs
Chlorophyll Content
A portable SPAD-chlorophyll meter is available for measuring chlorophyll contents in leaves.
Specifications:
- two LED light sources for differential determination of optical density
- max. leaf thickness: 1.2 mm
Chlorophyll Fluorescence
A portable PAM 2000 device is available for analyzing chlorophyll fluorescence-related parameters in leaves.
Specifications:
- actinic light source for inducing chlorophyll fluorescence
- flexible fibre optic and leaf clips for dark adaptation of leaves
Physiological Gas Exchange
Two LICOR 6400 devices are available for studying the gas exchange of needles or leaves.
Specifications:
- external CO2 injector
- leaf cuvette with internal LED light source
- sensor for photosynthetic active radiation
Soil Air Extraction
Gas-permeable tubes are used for collecting air samples for chemical analysis at different soil depths.
Specifications:
- permeable for many gaseous substances (e.g. CO2, NO2, NH4 und C2H4)
Soil Water Extraction
Suction cups are used for collecting soil water for chemical analysis at different soil depths.
Specifications:
- diameter: 20 mm
- active surface: 34 cm2
- pore size: 1 µm
Fine Root Growth
The temporal and spatial dynamic of fine root growth can be visualized with the CID root scanning system.
Specifications:
- scanning range: 21.6 x 19.6 cm
- scan resolution: 1200 dpi
- USB interface for data transfer
Solar Radiation
A SP-Lite Pyranometer is installed at the research plot for measuring solar radiation.
Specifications:
- spectral rangspectral range: 400 - 1100 nm
- operating temperature: -30 - 70°C
Stem Diameter Changes
Automated point dendrometers are available for monitoring diurnal / seasonal stem diameter changes in young trees.
Specifications:
- measuring range: 1 - 4 cm stem diameter
- resolution: 20 µm
Soil Matrix Potential
pF sensors are installed at 60 cm soil depth for measuring soil matrix potentials.
Specifications:
- measuring range: 1 to 10 000 000 hPa
- operating temperature: -40 - 80°C
Soil Moisture and Soil Temperature
Decagon's 5TM sensors are used for measuring soil moisture and temperature.
Specifications:
- measuring range, moisture: 0 - 100%
- measuring range, temperature: -40 - 50°C