The Extech MO220 is a conductivity moisture meter specifically designed for the wood industry. The instrument has eight calibration scales, enabling the user to take accurate moisture measurements in 170 wood species. Moisture measurements can be taken using the integral pin electrodes, or using the heavy duty moisture probe. When used with the temperature probe, the moisture measurements are automatically corrected with respect to temperature.
The Extech MO220 is a conductivity-based moisture meter specifically designed for the wood industry. It features eight calibration scales to enable accurate measurements across 170 different wood species using either integral pin electrodes or an optional heavy-duty probe. The device can perform automatic temperature correction (ATC) when used with a remote temperature probe, ensuring precise readings regardless of environmental conditions.
The manual details operation procedures including basic measurement steps, manual and automatic temperature corrections, and calibration checks using internal poles. It also covers care and maintenance instructions such as battery replacement, storage guidelines, and the proper disposal of electronic waste.
| Measurement principle | Electrical resistance |
|---|---|
| Range | Wood: 6 to 44% |
| Electrode length | 8mm (0.3") |
| Power supply | Two (2) 'AAA' 1.5V batteries |
| Operating Temperature | 0 to 40oC (32 to 104oF) |
| Dimensions | 130 x 40 x 25mm (5.1 x 1.6 x 1.0") |
| Weight | 100g (3.5 oz) |
The instrument has eight calibration scales, enabling measurements in 170 wood species.
An approximate manual correction of 0.5% moisture content per 9°F (5°C) may be added or subtracted.
For correct calibration, readings should be between 17.7 and 18.3% for the 18% scale, or 25.5 and 26.5% for the 26% scale.