Does it sense moisture through a painted surface or just the moisture content of the paint?

It senses moisture through a painted surface.

Can this be used on concrete and drywall?

Yes, the device has four modes. Wall, masonry, soft wood, hard wood. Wall is drywall.

Can this be used to locate a leak behind drywall. The drywall is not showing wetness so the water is probably running down a stud or outside wall.

This tool will measure the moisture content of any building material including wood and drywall. If the test indicates a high moisture content in just one spot, you could probably conclude that there was a leak at that point.

Will this unit work on a plywood sub floor, and hardwood flooring to verify the hardwood has properly aclimated for installation?

In order to get accurate readings you will need to make sure the two prongs on the top make contact with the area you wish to measure for moisture. The two prongs are pretty small and the tips are sharp. I was able to obtain readings on wet drywall, plywood and ceramic floor tile. As long as contact was made with the points it worked for me and the price is reasonable.

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General Tools Moisture Meter, Pinless, Digital LCD with Tricolor Bar Graph (MMD7NP)

General Tools Moisture Meter, Pinless, Digital LCD with Tricolor Bar Graph (MMD7NP)

Product ID: 49383845

Details

Battery description
9V
Brand
General Tools
Colour
Grey
Item weight
113 g
Product dimensions
7.6W x 2.9H

🌈3-color LED bar graph for instant readout

📏±4% accuracy on wood

🔋9V battery powered, auto power-off

€ 117.82

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌟 Measure moisture like a pro—stay ahead, stay dry!

PINLESS PRECISION - Non-invasive moisture detection under finished surfaces—no damage, no guesswork.
DEEP SENSING POWER - Detects moisture up to 3/4 inch (20mm) deep—see what others miss.
CLEAR VISUAL FEEDBACK - 2-inch backlit LCD plus tricolor LED bar graph ensures you never miss a critical reading.
SMART USER FRIENDLY - Auto-calibrating with HOLD button, low battery alert, and auto power-off for hassle-free use.
MATERIAL SPECIFIC MODES - Custom settings for drywall, masonry, softwoods, and hardwoods for pinpoint accuracy.

The General Tools MMD7NP Moisture Meter offers non-invasive, pinless moisture detection with ±4% accuracy and a 3-color LED bar graph for quick visual feedback. Designed for professionals and DIYers alike, it features material-specific modes, a 3/4 inch sensing depth, and smart functions like auto-calibration and low battery alerts, all powered by a 9V battery for reliable, on-the-go use.

Specifications

ASIN	B00HARYVUQ
Battery Description	9V
Best Sellers Rank	37,849 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 1 in Lab Moisture Balances
Brand	General Tools
Colour	Grey
Customer Reviews	4.4 4.4 out of 5 stars (4,029)
Global Trade Identification Number	00681035015834
Included Components	.....
Item Dimensions W x H	7.6W x 2.9H centimetres
Item Type Name	....
Item Weight	113 g
Lower Temperature Rating	32 Degrees Fahrenheit
Manufacturer	General Tools Mfg Co In
Manufacturer Part Number	MMD7NP
Model Number	MMD7NP
Mounting Type	Freestanding
Number of Items	1
Operating Humidity	Wide
Temperature Accuracy	±1°C
Temperature Reading Accuracy	plus_minus_1_degree_celsius
UPC	021113026145 681035015834 753248093142 031113198551 080000324931 044905098113 069060295955 971485411967 079531646414
Unit Count	1.0 count
Upper Temperature Rating	122 Degrees Fahrenheit
Voltage	9 Volts

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€ 117.82

Duties & taxes included

In stock

Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Belgium.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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