Extech 8-in-1 Pinless Moisture Meter (MO290) Infrared Thermometer

Model #: MO290
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Category Moisture Meters

This Extech Pinless Psychrometer plus IR thermometer is five meters in one. Monitor moisture in wood and other building materials with virtually no surface damage with the Pinless moisture sensor (pin-type moisture probe included). Measure humidity and air temperature with the built-in probe plus non-contact Infrared temperature with patented IR design.


  • Quickly indicates the moisture content of materials with Pinless technology without damaging the surface: The optional Remote Pin-type probe allows for contact moisture readings (3ft./0.9m cable length)
  • Select from multiple wood types and measurement ranges
  • Easy to read, large dual display with backlit feature
  • Simultaneously displays % moisture of wood or material being tested and Air Temperature, IR Temperature, or Humidity
  • Pinless measurement depth to 0.75" (19mm) below the surface
  • Designed with patented IR design to measure non-contact surface temperature; 8:1 distance to spot ratio with 0.95 fixed emissivity
  • Built-in Humidity/Temperature probe measures Relative Humidity, Air Temperature plus Grains Per Pound (GPP), Dew point (DP) and Vapor Pressure
  • Programmable high/low Moisture and Humidity alarms
  • Automatic calculation of differential Temperature (IR - DP) to determines condensation point
  • Min/Max and Data Hold
  • Auto power off and low battery indication
  • Complete 9V battery and pouch case


  • Sensor Type: Non-Penetrating
  • Pinless moisture detection: 0 to 99% (limited by wood type) Relative Only
  • Pinless depth: to 0.75"
  • Exterior moisture detection: 0 to 99.9%
  • Max Resolution: 0.1%, 0.1 F
  • Humidity: 0 to 99% RH
  • Dew Point: -22 to 199F (-30 to 100C)
  • Mixing Ratio: 0 to 999GPP (0 to 160g/kg)
  • Temperature (Air): -20 to 170 F (-29 to 77 C)
  • Temperature (IR): -4 to 392 F
  • Vapor Pressure: 0 to 20.0kPA
  • Field of View: 8:1 Distance to Target ratio
  • Emissivity: 0.95 fixed
  • Display: 3-digit primary display, 4-digit secondary display
  • Backlight White LED
  • Operating Temperature 14 to 122F (-10 to 50C)
  • Storage Temperature -14 to 140F (-30 to 60C)
  • Operating Humidity 90%, 32-86F (0-30C), 75%, 86-104F (30-40C)
    45%, 104-122F (40-50C)
  • Storage Humidity 90%
  • Power Supply 9V battery
  • Battery Life 6-8 weeks (4 hrs/day use), using alkaline batteries
  • Auto Power Off (APO) After 30 minutes (nominal) inactivity. The APO function can be
    disabled by the user
  • APO Quiescent Current 50μA maximum
  • Dimensions 6.5x2.8x1.5 (165x70x38mm)
  • Weight 7.4oz (210g)

Supplied with:

  • External probe
  • Padded hard case
  • 1 year manufacturers warranty
  • Users manual
  • 9v alkaline battery

Download Users Manual (PDF format)

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