Choosing A Sensor - Decagon Devices KD2 Pro Operator's Manual

ARROW KEYS: Located in the center of the
keypad, these keys navigate within menus and
sub-menus, and modify different settings in sub-
menus. Holding down an arrow key allows you to
scroll between different options quickly.
ESCAPE: This key backs out of sub-menus and
can be used to cancel certain actions (see "Erase,"
in "Data Menu," Chapter 2).
ENTER: This key is used to make selections
within menus and sub-menus, and also begins
taking measurements (see "Making a Measure-
ment," "Main Menu," below).

Choosing a Sensor

The KD2 Pro comes with three separate sensors, each of
which is designed for measurements in specific sample types.
KS-1
The small (60 mm long, 1.3 mm diameter) single needle KS-1
sensor measures thermal conductivity and thermal resistivity. It
is designed primarily for liquid samples and insulating materials
(thermal conductivity < 0.1 W (W/m· K)). The KS-1 sensor
applies a very small amount of heat to the needle which helps to
prevent free convection in liquid samples (see Chapter 6 in this
manual regarding measurement in liquid samples for more infor-
mation). However, the small size of the needle and typically
short heating time make the KS-1 a poor choice for granular
samples such as soil and powders where contact resistance can
be an important source of error.
KD2 Pro Operator's Manual
2. KD2 Pro Overview
In insulating materials, the
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