Moisture Encounter Plus
User Guide
Introduction
Your Moisture Encounter Plus is a patented instrument, which
enables non-invasive moisture measurement and detection in a
wide range of building materials.
The instrument operates on the principle that the electrical
impedance of a material varies in proportion to its moisture con-
tent.
To measure/detect moisture, the two co-planar conductive rubber
electrodes mounted on the base of the instrument case are
lightly pressed onto the wood or material sample. The instrument
measures the electrical impedance of the sample by creating a
low frequency alternating electric field between the electrodes.
This field penetrates the material under test to a depth of
approximately 30 mm (11/4 inches). The very small alternating
current flowing through the field is inversely proportional to the
impedance of the material. The instrument detects this current,
determines its amplitude and, after processing, drives the
pointer of the moving coil meter to the computed moisture value.
As there is a wide variation in the nominal electrical impedance
of different material types, the instrument is provided with three
selectable scales which are optimized for testing (1) Wood,
Timber (2) Drywall, Roofing and (3) Plaster, Brick. By selection
of an appropriate scale, the instrument can also be used for the
detection and location of elevated moisture in or behind a range
of covering materials such as wall, floor, and ceiling tiles, siding,
carpet, ceramic tiles and laminated floor coverings.
Transmit
Electrode
Moisture Encounter Plus
Alternating
Electric Field
Material sample
under test
Receive
Electrode