The determination of the range pF 3.0 - 4.2 (1.0 - 15.5 bar) with the membrane apparatus does not use samples cut in sample rings, but the semi-disturbed sample is saturated before measurement in the laboratory and placed in a synthetic ring.
To reach the high values of the pF-curve, it is necessary to apply pressure, up to 15.5 bar, on the samples, as it is not possible to create that amount of suction force. On reaching the equilibrium at the desired pressure value, the samples are removed, weighed, dried and weighed again.
For measuring larger series of samples, an additional membrane extractor can be connected parallel to the first extractor.
The set contains:
Successful pF determination with the membrane apparatus also requires a balance, drying oven and aluminium soil sample boxes with lids.
|Membrane apparatus for pF determination|
|Maximum number of samples||15|
|Measuring range||3.0 - 4.2 pF|
|Reading accuracy||0.25 bar|
|Power supply||line voltage|
|Voltage||230 VAC 50Hz|
Need advice choosing the right product for your application? Our specialist Michiel is happy to help.