This pF meter sets the pF value of the soil from pF1.6 to pF4.0 by the pressure plate method. It can set up to 24 pieces of sampling tubes in the sample chamber. The setting is done with the automatic pressure controller and a nitrogen cylinder. Any optional pF value is set with the automatic pressure controller and nitrogen cylinder. The automatic pressure controller can set an accurate and stable pressure without taking the influence of atmospheric pressure, not like manual regulator type.