To complement our lysimeter product line, we have developed a laboratory scale solution. The laboratory lysimeter is a small weighable lysimeter station, suitable for monoliths with a diameter of 200 to 800 mm and a height of 200 to 1.500 mm and indoor investigations. It is suitable for both disturbed (filled by hand) and undisturbed soil monoliths (special sampling devices).
We offer laboratory lysimeters in a variety of configurations. Each laboratory lysimeter system is customized to fit the planned project.
Possible measurement parameters are:
Weighing
Lower limit control
Irrigation
Water content of the soil
Soil temperature
Electrical conductivity
Soil pore sampling
Redox
pH value
Soil processes on a laboratory scale
Lysimeters are an important tool for investigating the water balance in agriculture, forestry and other ecological issues. In combination with precipitation measurements (sprinkler system) they allow the quantitative determination of the current evapotranspiration of vegetation-covered or vegetation-free soils.
Our laboratory lysimeter is a small lysimeter, which we have designed especially for laboratory use (indoor). Design, construction and functionality are always fully adapted to the study objective.
Studying soil processes on a laboratory scale has several advantages:
the controlled environment allows more accurate experiments
the scale can be adapted to a wide range of processes
it allows shorter experiment times compared to field studies
different materials can be incorporated quickly
Structure of our laboratory lysimeter - optionally expandable
The compact laboratory lysimeter consists of a lysimeter vessel, a weighing system and a set of high precision and accurately fitting soil hydrological sensors and a control station each.
The UGT laboratory lysimeter can be extended by a tension- and time-controlled suction probe system for automated control of the pore water extraction module and the lower lysimeter rim module, and by a sprinkler system.
The basic module is always the lysimeter vessel, which can be filled manually with a disturbed soil, but can also contain an undisturbed monolith. For laboratory purposes, a plastic jacket is usually used.
Laboratory lysimeter
dimensions lysimeter vessel
H=500mm iØ 300mm; aØ 315mm
power supply
230 V/ 50 Hz with backup battery 12 V/6,5 Ah
material
PE-HD
Base plate with open outlet
material
Polypropylen, conical, with outlet opening, Ø300 mm
filter
grid plate with appropriate mesh size to prevent from loss of soil
Weighing system
load cell
platform-cell, V2A
accuracy
0,025%
max. load
150 kg
operation temperature
- 10…+40°C
Tipping counter
resolution
4 ml, polyamid
Volume flow
1.0 l
housing
w = 210mm, H= 220mm d=255mm
SMT 100
number
max. 3 pc
measurement range soilmoisture
0-60 %vol (0…100% mit begrenzter Genauigkeit)
resolution soilmoisture
± 1% vol
accuracy soilmoisture
± 3 % Vol
measurement range temperature
-40 ... +60 °C (soil temperature)
resolution temperature
± 0.2 °C
accuracy temperature
± 0.8 %
signal output
2x analog (0-1V), digital SDI 12/ RS485
Tensio 160
numberl
max. 3 pc
measurement range
+ 20…-89 kPa
signal output
0….1 V DC, 4-20mA
supply voltage
9….30V
dimension standpipe
Ø 12mm; lengths 10 cm, stainless steel
suction probe
suction probe with ceramic
3 pc., L=10cm, delivery and vacuum pipe
pipe
acrylglas, Ø 20mm
ceramic
P80; 20x50mm
duran glass bottle (optional)
3 pc, 500 ml, GL 45,
lid (optional)
3 pc, with silicon seal, hose couplings, special water shut-off valve, hose connections
Bottle magazine
stainless steel
control station pore water sampling
integrated in the lysimeter control station
lysimeter-control station
datalogger
DT 80M; web-based interface, data storage and transmission, software, optional customer-specific programming
signal output digital
8 I/O´s, SDI-12, RS232, RS485
signal output analog
bis zu 15 (± 50V)
ports
Web & FTP Client/ Server, LAN, USB
housing
PG screw connections, protective roof, fittings for mast mounting
Modul pore water extraction system tension- and time controlled suction probe system (optional)
pump
3 pc. electric diephragm pump, four control levels
suction capacity
0,4 l/min
electronic vacuum regulators
3 pc, up to 0,6 bar
control station
integrated in the lysimeter control station
Modul lower boundary condition tension- and time controlled suction probe system (optional)
suction plate
HDPE, Ø 300mm
nylon membran pore size
30 µm
Bubble point
> 1 bar
pump
electric diephragm pump, four control levels
suction capacity
0.4 l/min
electronic vacuum regulator
1 pc, up to 0.6 bar
control station lower boundary
integrated in the lysimeter control station
Modul irrigation system
Irrigation rate l/h
5…11
UGT – 3 layer-filter gravel
fraction 1 particle size
0,1 …0,5mm
fraction 2 particle size
0,71…1,25mm
fraction 3 particle size
3,15…5,60mm
