The 20 cm diameter tension infiltrometer SW 080B is designed to measure the unsaturated flow of water into soil rapidly, accurately, and easily.
In this model, the infiltration disc has been taken out of the water tower. Then, even under windy conditions, your infiltrometer is much more stable and you gain accuracy.
The water level in the reservoir can be read on the attached centimeter scale, or determined by measuring the tension in the upper end of the water reservoir. Tension (negative pressure) in the air pocket at the top of the water reservoir is linearly related to the height of water in the reservoir. Thus, infiltration rates can be monitored by recording tension changes measured with a hand held pressure transducer ref. SMS 2500S or logged with a data logger and two electronic pressure transducers, ref. SKT 850.
Water reservoir :
length : 81 cm, inside diameter : 5,1 cm.
Bubbling pressin membrane air entry value : 30 cm H2O (about 30 hPa).
Housing : plexiglass and polycarbonate.
(*) The Nylon membrane can be sold as a spare part.
Separate infiltration disc for greater stability.
Low volume of water.
Flow rates read directly out of the water column or with an optional pressure transducer.
Polycarbonate and plexi-glass materials.
Replaceable NYLON mesh screen membrane.