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FLIR MR40 Moisture Pen with Built-in Torch

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Dual-Use Item: Export authorisation is required to temporarily or permanently move this item outside of the UK (Council Regulation (EC) No.428/2009)

Made for builders, building inspectors, remodelers, pest control professionals and building contractors, FLIR's MR40 is a pocket-sized, rugged 2-pin moisture meter made for testing the level of moisture in wood and common building materials.

The FLIR MR40 is uniquely designed, with pen-like shape that's compact, easy to handle and portable. The end of the probe has two sharp pins which are made for insertion into the material you want to test and includes a pin cap for covering these over when the MR40 isn't in use. The pins can be replaced with a spare set (included) when damaged.

Once inserted, the MR40 will display the detected level of moisture on the built-in LCD screen as a percentage reading. It'll also sound an audible tone depending on the range found, with ranges of 5-12%, 13-60% and 60%+ all available.

Working in the dark? No need to swap tools - the MR40 also includes a built-in torch to help you see what you're doing.

FLIR MR40 Moisture Pen Key Features

  • Pen-shaped moisture meter for measurements of moisture content in wood and building materials
  • Dual pin design made for direct contact with the material under test
  • Clear LCD display shows moisture content value
  • Audible indication of measured range (5-12%, 13-60% and 60%+)
  • Pocket-sized, portable design ideal for carrying in your pocket or toolkit
  • IP54 splash-proof rated
  • 3 meter drop test
  • Measurement hold function temporarily freezes value shown on the screen
  • Calibration/pin check integrated in protective cap

What's Included?

  • FLIR MR40 Moisture Pen
  • Spare Set of Pins

Need additional pins? You can order a spare pack by giving us a call and quoting part number MO25-PINS (10 pins included in the pack)

FLIR MR40 Technical Specifications

Measurement Range 5 to 60% MC (moisture content)
Measurement Accuracy 5 to 30% MC: ±2%
30 to 60% MC: reference only

Note: for materials other than group 9/Building materials plywood, drywall, and oriented strand board (OSB), download the MR40 material conversion table (publication MR40-AN01) from the FLIR website
Audible Indication 5 to 12%: low beep rate
13 to 60%: higher beep rate
More than 60%: highest beep rate (display OL)
Calibration/Pin Check 16%
General Specifications
Torch 40 lux
Display LCD
Electrode Pins Integrated, replaceable (4 pins included)
Measurement Principle Electrical resistance
Warranty Limited lifetime
Calibration Cycle N/A
Battery Type 2 x AAA batteries (included)
Battery Life 70 hours without torch
Battery Status Indicator 4 bar battery icon
Auto Power Off 3 minutes
Drop Test 3m (9.8ft)
IP Rating IP54 splash proof
Operating Temperature -10 to 60°C (14 to 140°F)
Weight 80g (2.8oz) with batteries
Dimensions 193 x 26 x 31mm (7.6 x 1.0 x 1.2")
Material PC-ABS w/TPE overmould
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Additional Information
Manufacturer Part Code MR40

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