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Product Code: MO257

$426.80 inc GST
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Take pinless (non-invasive) Moisture measurements on wood and building materials without damaging the surface with the depth of approx <0.78" (20mm) with Extech's MO257 Moisture Meter. The ball moisture sensor provides smooth gliding on hard or delicate surfaces. Easy-to-operate with automatic calibration of the meter when powered on. Large backlit triple LCD displays moisture reading and Max and Min readings. User can adjust two alarm levels where it will show visual alert with flashing “RISK” or “WET” indicators with beeper alert.


  • Relative pinless moisture reading for non-invasive measurement from 0.0 to 100.0 with 0.1 resolution
  • Multifunction backlit triple LCD display
  • Pinless measurement depth from 0.78" (20mm) to 1.6" (40mm) below the surface
  • High frequency sensing technology
  • Automatic Data Hold
  • Two adjustable alarm levels with audible beeper and visual (flashing “RISK” or “WET”) indicators
  • Automatic calibration (in dry air) when meter is powered on
  • Low battery indication
  • Auto Power off
  • Complete with 3 AA batteries and pouch case

Technical Specifications

Auto Power Off (APO)
After 30 minutes of inactivity
Display digits
Three (3) numeric displays; each displaying from 0.0 to 100.0
Display icons
HOLD, DRY, RISK, WET, MIN, MAX and low battery icon
Display type
Backlit LCD
Measurement Depth
20 to 40mm (0.79 to 1.57")
Moisture Range
0.0 to 100.0
Operating Humidity
90%, 0-30°C (32-86°F), 75%, 30-40°C (86-104°F), 45%, 40-50°C (104-122°F)
Operating Temperature
4 to 43°C (40 to 110°F)
Power Supply
Three (3) 1.5V 'AAA' batteries

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