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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MMD7NP

Product ID: 7606462

Details

Battery Description
Alkaline
Brand
General Tools
Item Weight
4 ounces
Lower Temperature Rating
32 °F
Product Dimensions
3"W x 1.13"H

📊3-color LED bar graph for instant moisture level

📏Reads moisture up to 3/4" deep

🔋Low battery alert for uninterrupted use

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Description

💧 Detect moisture before it becomes a problem — stay ahead, stay dry!

SMART ALERTS - Audible alarms and LED indicators keep you instantly informed
PINLESS PRECISION - Non-invasive moisture detection protects surfaces from damage
TRUSTED INNOVATION - From General Tools, a leader in precision tools for pros and DIYers
ERGONOMIC DURABLE - Rubber grips and backlit LCD ensure comfort and clarity during extended use
DEEP SURFACE INSIGHT - Measures moisture up to 19mm deep for accurate remediation decisions

The General Tools Digital Moisture Meter MMD7NP offers pinless, non-invasive moisture detection with readings up to 3/4" deep. Featuring a backlit LCD, 3-color LED bar graph, audible alerts, and ergonomic design, it empowers professionals and homeowners to prevent mold and water damage efficiently. Trusted by thousands, it’s the #1 moisture meter for precise, damage-free moisture monitoring.

Specifications

ASIN	B00HARYVUQ
Battery Description	Alkaline
Best Sellers Rank	#464 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Moisture Meters
Brand Name	General Tools
Customer Reviews	4.3 4.3 out of 5 stars (4,118)
Global Trade Identification Number	00681035015834
Included Components	.....
Item Dimensions W x H	3"W x 1.13"H
Item Type Name	....
Item Weight	4 ounces
LowerTemperature Range	32 °F
Manufacturer	General Tools Mfg Co In
Model	MMD7NP
Mounting Type	Wall Mount
Number of Items	1
Part Number	MMD7NP
Temperature Accuracy	±1°C
Temperature Reading Accuracy	plus_minus_3_degrees_fahrenheit
UPC	021113026145 681035015834 753248093142 031113198551 080000324931 044905098113 069060295955 971485411967 079531646414
Unit Count	1 Count
Upper Temperature Range	122 °F
Voltage	9 volts

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12355F

Duties & taxes included

In stock

Sold byAmazon French PolynesiaDelivered 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 French Polynesia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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