Enabling better global research outcomes in soil, plant & environmental monitoring. 27
9.8
Insulating Needles for Small Diameter Stems
If the needles extend beyond the stem, they should be insulated from direct
sunlight, as this will artificially heat the stainless-steel needles. A cable sheath
from the figure-8 power cable can be used along with some insulating foam.
Cover the full installation with aluminum foil to reflect direct radiation.