PROBE FOR MONITORING THE ELECTRICAL CONDUCTIVITY OF SOIL SOLUTIONS.

摘要

A probe (10) for monitoring electrical conductivity of soil solutions includes: • an upper hollow tube section (14) stoppered (19) at one end, • a lower hollow tube section (12) capped at its bottom with a porous ceramic material (18) for inserting into soil, • a T fitting (16) connecting the other end of the upper hollow tube sections in vertical alignment with the lower hollow tube section, said T fitting having an aperture stoppered (30), an electric conductivity sensor probe (24) with an electric conductivity sensor electrode (26) inserted through the stopper (19) of the upper hollow tube section into the lower hollow tube section, and • a vacuum tube (32,34) inserted through the stopper (30) of the aperture of the T fitting extending into the lower hollow tube section, whereby ground solution can be withdrawn from the probe via the vacuum tube by a vacuum generator (38) and fresh ground solution can be drawn into the probe without removing the sensor probe from the probe.