Moisture Pen + Flashlight

This FLIR MR40 is small enough to carry in your pocket, is IP54 splash-proof rated, and has been 3-meter drop tested, so it’s always ready to work when, and wherever you are.

Categories: , SKU: MR40


The FLIR MR40 is a pocket-portable, rugged 2-pin, single-scale moisture meter with an integrated flashlight for wood and common building materials – ideal for builders, building inspectors, remodelers, moisture remediation technicians, pest control professionals, and residential roofing and flooring contractors. Providing reliable and accurate measurements offered at a highly affordable price point, MR40 is a quick and easy-to-use tool to find and quantify moisture content.

When used in combination with a thermal camera, MR40 can help confirm whether a cold spot in a thermal image is moisture, and measure the severity of the problem.


Measurement Range 5% to 60% MC (moisture content)
Measurement Accuracy 5 to 30% MC (Moisture Content): +/- 2%
30- 60% MC (Moisture content): Reference only
Note: For materials other than Group9/ Building Materials: plywood, drywall, and oriented strand board (OSB), download the MR40 Material Conversion Table (publication MR40-AN01):
Audible Indication 5-12%: Low Beep rate. 13-60%: Higher beep rate.
More than 60%: Highest Beep rate (Display OL)
Calibration/ Pin Check, Integrated in Cap 16%
Meter data
Work light ~40 lumens
Display LCD
Electrode pins Integrated, Replaceable
Measurement Principle Electrical Resistance
Warranty Limited Lifetime
Calibration cycle N/A
Certifications CE


 MR40 Datasheet




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