EXTECH MO257 Pinless Moisture Meter for Non-Destructive Measurement, 0.0 to 99.9%

Measuring moisture in wood, drywall, plaster, and concrete without leaving holes or marks is a challenge. The EXTECH MO257 solves this with non-destructive, pinless capacitive sensing that reads moisture up to 40 mm deep.

Who is it for

Building inspectors, flooring contractors, restoration professionals, and DIY renovators who need quick, damage-free moisture checks.

Main features

• Pinless, non-destructive measurement with integrated spherical sensor
• Measurement range: 0.0 to 99.9% relative moisture
• Selectable material groups for wood, plaster, concrete, drywall, and more
• Audible alarm with user-settable threshold
• Backlit LCD display with data hold
• Auto power off after 10 minutes of inactivity
• Powered by a 9V battery

Specifications

• Measurement principle: Capacitive, pinless
• Measurement depth: Up to 40 mm (1.5 inches)
• Resolution: 0.1%
• Accuracy: ±5% (relative)
• Material groups: 10 selectable types
• Display: Backlit LCD
• Auto power off: After 10 minutes
• Power source: 9V battery
• Operating temperature: 0 to 50°C (32 to 122°F)
• Operating humidity: 0 to 80% RH non-condensing
• Low battery indicator: Yes

Tips

For best accuracy, select the correct material group before measuring. The spherical sensor allows measurements in corners and on uneven surfaces.