The Extech MO210 is a moisture meter that can measure moisture content in wood, paper, cardboard, plywood, gypsum, paint, fabrics, insulation materials, and other building materials. It can quickly and accurately measure moisture content and provide reliable, repeatable results.
This manual provides instructions for using the Extech MO210 moisture meter, including how to measure moisture in wood and building materials. It details electrode handling, display reading, auto power-off, and battery replacement procedures. The device features a dual-scale LCD display and is designed for reliable, long-term use with proper care.
Specifications include a measurement range of 6–44% for wood and 0.2–2.4% for building materials, with a 9.5mm electrode length and 3 CR-2032 batteries. The meter operates from 0 to 40°C and weighs 108.3g.
| Display | Dual measurement scale LCD with bargraph metering |
|---|---|
| Measurement principle | Electrical resistance |
| Range | Wood: 6 to 44%, Building materials: 0.2 to 2.4% |
| Electrode length | 9.5mm (0.375") |
| Auto Power OFF | After approx. 15 minutes |
| Power supply | Three (3) CR-2032 button cells |
| Operating Temperature | 0 to 40 o C (32 to 104 o F) |
| Operating Humidity | 85% Relative Humidity maximum |
| Dimensions | 130 x 40 x 25mm (5.1 x 1.6 x 1.0") |
| Weight | 108.3g. (3.82 oz) |
The LCD has two scales: wood moisture from 6–44% and building materials from 0.2–2.4%. A continuous line indicates an even number, a dotted line indicates an odd number. To convert building material readings to wood %, multiply by 20.
Replace the batteries. For the wood moisture position, touch the test pins to points labeled ‘B’; the meter should read >44% ±2%. If not, replace the batteries.
Remove the protective cap, unscrew the pins, install new ones, and replace the cap. Always handle the pins carefully as they are extremely sharp.
The meter turns off automatically after 15 minutes if the cap is removed. Press the yellow cutoff switch momentarily to restart it.