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 moisture level

📏±4% accuracy on wood

🔋9V battery powered, auto power-off

KSh21071

Duties & taxes included

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Sold byAmazon KenyaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌟 Measure Smarter, Not Harder — Stay Ahead of Moisture Trouble!

SMART EFFICIENT - Auto-calibrating with HOLD button, out-of-range alarm, and low battery indicator for seamless operation.
PORTABLE POWERHOUSE - Lightweight 113g design powered by a standard 9V battery keeps you ready for any job, anywhere.
MULTI SURFACE MASTERY - Custom settings for drywall, masonry, softwoods, and hardwoods ensure pinpoint accuracy.
NON INVASIVE PRECISION - Detect moisture beneath finished surfaces without damaging walls or woodwork.
INSTANT VISUAL FEEDBACK - Backlit 2-inch LCD plus tricolor LED bar graph delivers real-time moisture insights at a glance.

The General Tools MMD7NP is a pinless, non-invasive digital moisture meter featuring ±4% accuracy on wood and a 3/4 inch sensing depth. It offers tailored settings for multiple materials, a backlit LCD screen, and a tricolor LED bar graph for instant moisture level visualization. Powered by a 9V battery with auto power-off and low battery alerts, this lightweight tool is perfect for professionals and DIYers seeking precise, damage-free moisture detection.

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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KSh21071

Duties & taxes included

In stock

Sold byAmazon KenyaDelivered 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 Kenya.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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