Key facts
- Brand
- EXTECH
- Model
- MO220
- Industry
- Industrial
- Documents
- 2
- Languages
- EN · ZH
- Last added
- 2022-11-05
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Extech MO220 Moisture Meter User Manual
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.
Extech MO220 specifications
| 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) |
All Extech MO220 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How many wood species can the MO220 measure?
The instrument has eight calibration scales, enabling measurements in 170 wood species.
What is the manual correction rate for temperature?
An approximate manual correction of 0.5% moisture content per 9°F (5°C) may be added or subtracted.
How does the automatic temperature correction work?
When using the remote temperature probe, the meter automatically adjusts the moisture reading based on the wood's temperature relative to the calibration temperature of 68°F (20°C).
How do I perform a manual accuracy check?
Select group A, remove the temperature probe, and connect the two measurement pins to the 18% and 26% calibration nodes inside the protective cover.