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MO55-en-GB_V1.1 10/18
2
Introduction
Thank you for selecting the Extech MO55 Pin and Pinless Dual Moisture Meter. The compact
MO55 takes quick Moisture level reference measurements (in percent %) on wood and building
materials. The MO55 can be used in pinless mode (rear sensor) or in pin mode. The MO55 is
simple to operate and offers measurement digits, audible tones and ‘moisture drop’ icons to
indicate moisture level content.
The MO55 is ideal for building restoration projects and applications where moisture detection on
floors and under carpets is critical. The MO55 is a great tool for analyzing the after-effects of
water leakage behind walls and in ceilings.
This meter is shipped fully tested and calibrated and, with proper use, will provide years of
reliable service. Please visit our website (www.extech.com) to check for the latest version of this
User Guide, Product Updates, Product Registration, and Customer Support.
Features
Displays the moisture level in wood and building materials (wall board, sheet rock, cardboard,
plaster, concrete, and mortar)
Pinless (non-invasive) or Pin modes of operation
Auto zero calibration for Pinless mode
Audible tone rate beeps faster as the moisture level increases (8 tone variations)
‘Moisture drop’ Icons display low, medium and high levels of moisture content
Easy-to-use, compact design
Display Lock freezes reading on display
Auto Power Off after 2 minutes conserves battery power
Complete with protective cap and 9V battery
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