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Extech

Extech MO55 Combination Pin Pinless Moisture Meter Accurate Non‑Invasive and Destructive Measurements for Restoration and Building Diagnostics

  • Based on 727 reviews
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Availability: In Stock.
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Arrives Apr 26 – Apr 29
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Style: MO55


Pattern Name: Moisture Meter


Features

  • Accurate moisture readings on wood and building materials using pin or pinless noninvasive measurement to a depth of ~25 mm
  • Audible tone increases in frequency as moisture levels rise giving immediate feedback
  • Visual moisture drop icons indicate low medium and high levels of moisture content
  • Compact easytouse design with builtin battery level check measurement verification and display lock function
  • Includes protective cap two pins and 9 V battery for ready to use convenience

Description

The MO55 is a combination pin/pinless moisture meter. Take quick moisture measurements on wood and building materials with choice of pin or pinless (non-invasive) Method. Easy-to-operate with display icons that indicate the levels of moisture content Plus audible alert feature. Ideal for building restoration projects and applications where moisture detection on floors, tiles and under carpets is critical. A Must-Have tool for analyzing the after- effects of water leakage behind walls and in ceilings. Complete with pins (2), protective cap, and 9V battery.

Color: Green


Brand: Extech


Product Dimensions: 2.6"W x 6.7"H


Item Weight: 0.27 Pounds


Battery Description: AA


Color: ‎Green


Brand: ‎Extech


Product Dimensions: ‎2.6"W x 6.7"H


Item Weight: ‎0.27 Pounds


Battery Description: ‎AA


Mounting Type: ‎Wall Mount


Operating Humidity: ‎10-90% relative humidity


Upper Temperature Rating: ‎45 Degrees Celsius


Voltage: ‎9 Volts


EU Spare Part Availability Duration: ‎1 Years


Temperature Reading Accuracy: ‎plus_minus_1_point_5_degrees_celsius


Manufacturer: ‎Extech


UPC: ‎793950475058


Global Trade Identification Number: ‎58


Item Weight: ‎4.3 ounces


Item model number: ‎MO55


Batteries: ‎2 AA batteries required. (included)


Is Discontinued By Manufacturer: ‎No


Date First Available: ‎July 11, 2016


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Apr 26 – Apr 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • works and easy to use
Style: MO55 Pattern Name: Moisture Meter
works. easy to use. just what I needed to check for basement leaks.
Reviewed in the United States on February 5, 2026 by Robert M.
    • Works well without spending hundreds of dollars
Style: MO55 Pattern Name: Moisture Meter
This is the perfect tool to use in your house to check and make sure there aren’t any leaking pipes or rainwater getting in to your house. Heavy rains can drive water into the walls and sometimes sinks and toilets a leak and you’re not aware of it. Just lay this thing against the wall against the floor around your cabinets and you’ll know if it’s wet Underneath ... show more
Reviewed in the United States on January 10, 2024 by Song Sparrow
    • Wood moisture meter
Style: MO55 Pattern Name: Moisture Meter
Great for checking my firewood. Have used a lot this winter. Would buy again..
Reviewed in the United States on February 7, 2026 by charles sweeney
    • Pins are bad and display is not backlit.
Style: MO55 Pattern Name: Moisture Meter
The pinless function works fine however the pins continually lose contact. I have to constantly retighten the pins but they are not reliable. I can now only use it as a pinless meter. Also, because the display is not backlit, it is very difficult to read. I use this meter in Crawlspaces and attics quite frequently. Not happy with it’s performance. ... show more
Reviewed in the United States on February 21, 2021 by Victor Henderson
    • Man was I disappointed in this moisture meter.
Style: MO55 Pattern Name: Moisture Meter
This is one of those "you get what you pay for" products. I used it 3 times and the 3rd time it only reads 0% no matter in what mode it is set for. Changed battery stiil reads 0% even on a wet piece of drywall. I called customer support and low and behold they too said the unit was defective after doing all the tests for them over the phone and they told me it was still under warranty. Then If i take off work, drive to the UPS store, wait in line, pay to have packaged, shipped back to somewhere in the north east, wait a week to 10 days, they will look at it and confirm it really is not working, they would maybe ship a new one. If you add up your loss of work time, gas, wait in line time, phone time discussing what the unit was not doing (working) pay for boxing and shipping you are way ahead to through it in the trash and explain to other potential buyers what unit not to get. Good luck if you try to SAVE MONEY and buy this. This is one of the great lessons of life where you learn not to buy twice. David C Imhoff ... show more
Reviewed in the United States on November 29, 2021 by D. Imhoff
    • The Extech MO55: A Moisture Detective’s Best Friend – D & D Approved! 🔍💧✅
Style: MO55 Pattern Name: Moisture Meter
Review Image by D & D Pest Control Co. D & D Pest Control Co.
If Sherlock Holmes were a home inspector, he’d carry the Extech MO55 in his pocket like a magnifying glass for moisture mysteries! This little gadget is like a truth serum for damp drywall, stubborn subfloors, and sneaky wooden beams that think they can hide moisture from us. Think again, fellas! As a backup for D & D Home Inspection Services, the MO55 has been a rockstar—quick, reliable, and precise! Whether we’re using the pin mode for those deep investigations or the pinless mode for a less invasive check, it delivers the facts fast. The audible alert is an absolute bonus—it basically shouts, 'Hey! Something’s fishy here!' (or should I say… damp?). Lightweight, easy to use, and built to handle the rough-and-tumble world of home inspections, this meter has already proven its worth. If moisture had a lawyer, it would hate this device. Highly recommend for pros and homeowners alike—D & D gives it a solid ✅! ... show more
Reviewed in the United States on February 7, 2025 by D & D Pest Control Co. D & D Pest Control Co.
    • Reliable and just works well
Style: MO55 Pattern Name: Moisture Meter
I don’t like the on/off button as it easily gets bumped and will turn on when you don’t want to. The depth on the pinless mode seems really good. I like that I can set it down on a flat surface and then back up and take a picture without having to hold onto it like I do with protimeter. Unit has been durable and reliable. It would be nice if they added an accessory jack. Overall good value. I’ve bought several now. ... show more
Reviewed in the United States on November 2, 2023 by Q Row
    • Here’s the perfect case
Style: MO55 Pattern Name: Moisture Meter
It’s small and fits perfectly inside a “GLCON Vertical-Stripe Hard Drive Case for Western Digital WD Elements My Passport/Samsung T9 Portable/Seagate Portable 1TB 2TB 4TB - Shockproof External Hard Drive Travel Carrying Case” Currently the brown striped case (which looks like a piece of wood) is $7. You’re welcome. I’ll review the device later. ... show more
Reviewed in the United States on December 11, 2025 by Craig Hertzler

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