 
The Surveymaster SM
A dual function instrument that combines the proven two-pin inspection
method with a new non-invasive radio frequency technique. The result is...
...a NEW moisture meter for rapid and thorough inspection of buildings
for dampness on and below a surface.
This easy-to-use instrument employs two electronic circuits:
The first is for the conventional two pin method which shows whether
a surface is dry, damp or wet. This is known as the Measure
mode.
The second is based on radio frequency emissions with the electronics
located in a 'bulge' at the back of the instrument. It is capable
of measuring moisture through many wall and floor coverings and
ceramic tiles. This is known as the Search mode.
Measure Mode
The two-pin measure mode. This shows by means of green, yellow
and red LED's whether a surface is safe ie air-dry, 'borderline'
or damp. The dampness measured is quantified on the LCD display
to one decimal place in terms of % wood-moisture-equivalent (%WME).
Search Mode
The new search mode. This shows by means of the same colour coded
LED display as the measure mode if the fabric of a wall is dry
or damp below a surface. There is also a volume-adjustable audiable
alarm synchronised with the display. In this mode the meter employs
radio frequency emissions (RFE) to measure moisture through most
wall and floor coverings including ceramic tiles.
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