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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
Condition: Used - Like New
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Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon
Arrives Jun 21 – Jun 24
Order within 23 hours and 12 minutes
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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


Battery Description: AA


Mounting Type: Wall Mount


Operating Humidity: 10-90% relative humidity


Upper Temperature Range: 45 Degrees Celsius


Voltage: 9 Volts


Temperature Reading Accuracy: plus_minus_1_point_5_degrees_celsius


Item Dimensions W x H: 2.6"W x 6.7"H


Item Weight: 0.27 Pounds


Color: Green


EU Spare Part Availability Duration: 1 Years


Brand Name: Extech


Manufacturer: Extech


UPC: 793950475058


Warranty Description: Full one year warranty on parts and workmanship, unless otherwise specified. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification.


Global Trade Identification Number: 58


Part Number: MO55


Model: MO55


Unit Count: 1.0 Count


Included Components: Complete with pins (2), protective cap, and 9V battery


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jun 21 – Jun 24

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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Top Amazon Reviews

    • The Extech MO55: A Moisture Detective’s Best Friend – D & D Approved! 🔍💧✅ 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.
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 Reviewed in the United States on February 7, 2025 by D & D Pest Control Co.
    • 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.
    • Accurate product.
Style: MO55 Pattern Name: Moisture Meter
Love this product. I use it at almost every job sight. Love the non probing feature to ready different building materials. I do not recommend keeping these in your vehicle as I think it ruins the display. Also don't keep in your tool bucket. It's not the best at withstanding hits.
Reviewed in the United States on July 8, 2019 by Dallin
    • 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
    • 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
    • Good product, not great Good product, not great
Style: MO55 Pattern Name: Moisture Meter
Review Image by M.R.
Review Image by M.R.
Bought in November 2021 for professional use in building forensics. Good product - relatively accurate. Pad sensor works well. Pins are not as accurate and you have to jiggle it around to get the reading. A hair's movement and it loses the reading. Button is on the front and activates/powers it on and off easily if you don't have it in your hands. I had in my work bag in its own compartment and would go off randomly all the time. In November of 2023, the power button jammed up on me on a jobsite, beeped on/off for a better part of 30mins, then ultimately just never turned on. Chart on the rear is super useful! Extech instruments was bought by Flir, so maybe they'll work on that. Not getting another one, but good for a first time user. ... show more
Reviewed in the United States on January 4, 2024 Reviewed in the United States on January 4, 2024 by M.R.
    • 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

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