Item no.: 1421000 (Hood-Infiltrometer IL 2700) Item no.: 1420000 (Hood-Infiltrometer)

Advantages at a glance

  • Measurements reproduce natural infiltration conditions on the surface
  • Water infiltrates directly into the soil (no contact layer required)
  • Controlled constant hydraulic pressure
  • measurement with different hydraulic pressure levels or different infiltration areas
  • easy conversion into a tension infiltrometer
  • Case for maximum protection and easy handling

Please send me more information about Hood-Infiltrometer


The hood infiltrometer developed by UGT is used to measure the hydraulic conductivity of soils in the near-saturated zone in field tests (SCHWÄRZEL & PUNZEL 2007). The instrument consists of three components: 1) hood, 2) Mariotte` s water supply consisting of infiltration vessel, bubble tower and aeration tube and 3) U-tube manometer.

Mode of operation

Infiltration is performed from a closed hood (open at the bottom) placed on the bottom and filled with water. The circular ground surface under the hood, covered by water, forms the source surface for the infiltration flow. No additional contact layer or preparation of the soil surface is required on the measuring surface. This not only saves working time, but also allows the infiltration or hydraulic conductivity to be determined non-destructively under completely natural conditions.
The pressure under the hood is controlled by a Mariotte` s water supply. The effective hydraulic pressure head at the soil surface can be freely selected between zero and a negative pressure up to the air penetration point of the soil. The hydraulic pressure head is precisely indicated via a U-tube manometer. The hydraulic conductivity is calculated from the steady-state flow rates determined in the test run according to WOODING (1968).


In the case of the IL 2700 hood infiltrometer, the flow rate measurement data are recorded electronically with a pressure sensor in combination with the IL 2700 handheld unit and transferred to the PC and evaluated with the associated software. As a cost-effective and robust alternative even under adverse measuring conditions, the hood infiltrometer is also available without electronic data acquisition.

Two hoods with a ratio of infiltration areas of about 1:2 are available to ensure optimum adaptation of the test to the infiltration conditions present. This allows the infiltration tests to be carried out not only at different hydraulic pressure heads, but also at the same hydraulic pressure head with different infiltration areas.

Conversion to a tension infiltrometer

The hood infiltrometer functions up to the air penetration point of the soil. After that, it can be easily converted into a tension infiltrometer with our optionally available tension chamber, which allows infiltration tests up to a water tension of about 60 hPa, independent of the air penetration point of the soil.


SCHWÄRZEL, K. & J. PUNZEL (2007): Hood infiltrometer: New type of tension infiltrometer. Soil Sci. Soc. Am. J. 71: 1438-1447.

WOODING, R. A. (1968): Steady infiltration from a shallow circular pond. IN: Water Resources Research 4: 1259-1273.


0 … Luftdurchtrittspunkt mit Haube
0 … 60 hPa mit Tensionskammer

Tensionsmessung Auflösung

0,1 hPa (U-Rohrmanometer)


Differenzdrucksensor: 0 - 70 mbar

Auflösung: 1 mm WS

Leitfähigkeitsbereich des Bodens

10-3 m/s bis 10-7 m/s




5 l

Durchmesser Außenrohr

aØ 120 mm, iØ 110 mm

Höhe Außenrohr

690 mm (innen)

Durchmesser Blasenturm

aØ 50 mm, iØ 44 mm

Höhe Blasenturm

690 mm


Acryl, klar

Grundplatte mit Standfüßen


Form, Dimension

Dreieckig, längste Ausdehnung 221 mm



Höhe über verstellbare Standfüße

zwischen 20,5 und 28 cm




Klein: aØ 160 mm, iØ 160 mm

Groß: aØ 240 mm, iØ 226 mm


100 mm (ohne Steigröhrchen), 233,5 mm (gesamt ohne Anschluss)


PETG, farblos




Klein: aØ 180 mm, iØ 177 mm

Groß: aØ 250 mm, iØ 247 mm


40 mm






+25 cm … 0 … -25 cm

Höhe U-Rohrmanometer (Aluminiumblech)

645 mm

Höhe Haltestange (Edelstahl)

620 mm (ohne Griff)




90 x 55 x 31 cm


18,7 kg

Related Products