Possible measurement parameters are:
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:
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 constructed soil, but can also contain an undisturbed monolith. For laboratory purposes, a plastic jacket is usually used.
Laboratory lysimeter |
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|---|---|
| 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 |
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| load cell | platform-cell, V2A |
| accuracy | 0,025% |
| max. load | 150 kg |
| operation temperature | – 10…+40°C |
Tipping counter |
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| resolution | 4 ml, polyamid |
| Volume flow | 1.0 l |
| housing | w = 210mm, H= 220mm d=255mm |
SMT 100 |
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| 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 |
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| 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 |
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| 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 systemtension- and time controlled suction probe system (optional) |
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| 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 conditiontension- and time controlled suction probe system (optional) |
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| 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 |
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| Irrigation rate l/h | 5…11 |
UGT – 3 layer-filter gravel |
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| fraction 1 particle size | 0,1 …0,5mm |
| fraction 2 particle size | 0,71…1,25mm |
| fraction 3 particle size | 3,15…5,60mm |
