FLIR MR40 Moisture Pen

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  • Sturdy, small and lightweight
  • Measures moisture content from 5% to 60%
  • Integrated torch illuminates measurement target
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rrp £62.00

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rrp £62.00


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  • Description

    FLIR MR40 Moisture Pen

    The FLIR MR40 Moisture Pen is a handy and reliable addition to any toolbox. It measures moisture levels in wood and other common building materials from 5% to 60% via its two replaceable electrode measurement pins. Accuracy stands at ±2%. These measurement capabilities make it suitable for a range of different industries including construction, moisture remediation, pest control and roofing/flooring. It is particularly useful when used in tandem with a thermal camera as it can indicate whether a cold spot is the result of excess moisture.

    Digital readings are displayed on the LCD display and an audible beeper provides further feedback. The FLIR MR40 fits easily into the user’s pocket and further practicality comes in the form of the integrated torch which illuminates dark target areas. Operation is incredibly simple and the instrument is splash-proof and drop-tested to three metres. The battery lasts for roughly 70 hours (without the torch) and the pen is covered by a limited lifetime warranty.

    FLIR part number: 793950370414

    Key Features

    • Moisture measurement range: 5% to 60%
    • Measurement accuracy: ±2%
    • Digital LCD display
    • Audible beeper indication
    • Small and compact
    • Built-in torch
    • 70-hour battery life
    • Limited lifetime warranty
  • Specification


    • Measurement Range: 5% to 60% MC (Moisture Content)
    • Measurement Accuracy: 5 to 30% MC (Moisture Content) - +/- 2%; 30 to 60% MC (Moisture Content) - Reference only*
    • 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, Integrated in Cap: 16%

    *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):

    General Information

    • Flashlight: ~40 lumens
    • Display: LCD
    • Electrode pins: Integrated, Replaceable (4 pins included)
    • Measurement: Principle Electrical Resistance
    • Warranty: Limited lifetime
    • Calibration cycle: N/A
    • Battery type: 2 × AAA alkaline batteries (included)
    • Battery life: 70 Hrs W/O Flashlight
    • Battery status indicator: 4 Bar battery icon
    • Auto Power Off (APO): 3 minutes
    • Drop test: 3 m (9.8 ft.)
  • Product Documents

    Product Attachments

    View FileFLIR MR40 Datasheet    Size: (712.21 KB)
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  • Delivery Information

    At we understand the importance of a reliable delivery service when shopping online. Especially when the goods are often essential to your working day. If your goods are required by a certain date please feel free to contact us for an honest and realistic indication whether this can be met. We aim to process all orders we receive within 1 to 3 working days, however from time to time we do have an increased demand for certain products or there might be delays from the manufacturer. In such cases delivery of your equipment may be subject to a minor delay.

    We use DPD/Interlink for all larger items and Royal Mail for smaller items and accessories. With DPD/Interlink you will receive a 1 hour delivery window on the day of delivery via e-mail/text and a notification 15 minutes before arrival so you will not have to wait around all day. You can even manage your booking online and re-arrange delivery for another date or arrange the goods to be left with a neighbour of your choice.

    We also offer delivery options for goods required urgently on certain products, all which are sent by DPD/Interlink.

    Our charges for UK deliveries:

    • FREE Delivery (on select products only): typically 3-5 working days*
    • Standard Delivery at £4.95: 2-3 working days
    • Next Working Day Delivery (on select products only) at £7.50
    • Pre-Noon Next Working Day Delivery (on select products only) at £9.50*
    • Pre-10.30am Next Working Day Delivery (on select products only) at £18.50*
    • Saturday Pre-Noon Delivery (on select products only) at £14.50*
    • Sunday Pre-Noon Delivery (on select products only) at £14.50*

    *UK mainland only

    NOTE! For next working day or Saturday/Sunday delivery options the order MUST be placed no later than 3pm on the working day before delivery is required. After 3pm, please arrange with our staff before selecting a priority delivery service. Priority services are available to UK mainland residents only (this might exclude certain areas in the north of Scotland).

    Customers outside the UK: exports to many countries all over the world. Prices for shipping vary on location and weight/dimensions. Costs are calculated for certain countries at the checkout. If your country is not included in this list please e-mail with your name, address and the items you would like to order for an accurate shipping quote or go to for more information.

    For more information on delivery, please see our terms and conditions.