

Extech MO280 Pinless Moisture Meter
The Extech MO280 is a non-invasive pinless moisture meter designed to measure moisture content in wood and building materials without penetrating the surface. With a measurement depth of up to approximately ¾″ (20 mm), selectable material types, and a large digital display, it’s suited for inspections, restoration work, and quality control where surface damage must be avoided.
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Description
The MO280 uses a low-power electromagnetic signal sent through the rear sensor pad to detect the average moisture content in materials beneath the surface. The LCD displays a moisture percentage, and users can choose from ten material group settings (covering various woods and building materials) for more accurate readings. The device is auto-calibrating and includes features such as a Data Hold button, low‐battery indication, and auto power-off for convenience. It is capable of measuring to a depth of about 0.75″ (20 mm) under the surface and works across a range of surfaces including wood, drywall, tile coverings, paper, and fabric. The MO280 is compact and portable, powered by a single 9 V battery, and comes with a protective pouch for field use. It’s designed to provide quick, reliable moisture readings without damaging the surface under test.
Features
- Pinless, non-destructive measurement – No penetration of the material required.
- Measurement depth up to ~0.75″ (20 mm) under the surface.
- Selectable material groups – Includes 10 wood and building-material types for tailored readings.
- Digital LCD display – Clearly shows moisture percentage readings.
- Data Hold function – Freezes current readings for easy recording and review.
- Auto-calibration and auto power-off – Simplifies operation and conserves battery life.
- Low battery indication – Ensures reliability during field use.
- Versatile compatibility – Works on wood, drywall, tile coverings, fabric, and paper.
- Compact and portable design – Powered by a 9 V battery and supplied with a protective pouch.
- Defined sensor area (~1.6″ × 1.6″ / 40 × 40 mm) – Provides consistent contact surface for accurate measurements.
Includes
- 9V Battery
- Pouch Case


