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 Digital Moisture Meter MMD7NP - Humidity Sensor- Pinless and Non-Invasive

General Tools Digital Moisture Meter MMD7NP - Humidity Sensor- Pinless and Non-Invasive

Product ID: 7606462

Details

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

🌈3-color LED bar graph for instant moisture status

📏Reads moisture up to 3/4" deep

🔋Low battery alert for uninterrupted use

R$858

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Description

🌟 Stay ahead of moisture — protect your space like a pro!

DEEP DIVE DETECTION - Measures moisture up to 19mm deep, ensuring accurate readings beneath the surface.
ERGONOMIC INTUITIVE - Comfort grip and one-button operation make moisture monitoring effortless for pros and DIYers alike.
INSTANT VISUAL ALERTS - 3-color LED bar graph and audible alarms keep you informed in real-time.
MOLD PREVENTION POWER - Early detection with out-of-range alarms helps you stop mold before it starts, safeguarding your home.
PINLESS PRECISION ZERO DAMAGE - Non-invasive moisture detection protects your surfaces from scratches and marks.

The General Tools Digital Moisture Meter MMD7NP offers pinless, non-invasive moisture detection up to 3/4" deep with a broad measurement range for wood and building materials. Featuring a backlit LCD, 3-color LED bar graph, audible alerts, and ergonomic design, it delivers fast, accurate readings to prevent mold and water damage. Trusted by professionals and DIYers, it’s the essential tool for smart moisture management and home safety.

Specifications

ASIN	B00HARYVUQ
Battery Description	Alkaline
Best Sellers Rank	#616 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Moisture Meters
Brand Name	General Tools
Customer Reviews	4.4 4.4 out of 5 stars (4,072)
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 Degrees Fahrenheit
Manufacturer	General Tools Mfg Co In
Model	MMD7NP
Mounting Type	Wall Mount
Part Number	MMD7NP
Smart Home Compatibility	Not Smart Home Compatible
Temperature Accuracy	±1°C
Temperature Reading Accuracy	plus_minus_3_degrees_fahrenheit
UPC	021113026145 681035015834 753248093142 031113198551 080000324931 044905098113 069060295955 971485411967 079531646414
Unit Count	1.0 Count
Upper Temperature Range	122 Degrees Fahrenheit
Voltage	9 Volts

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R$858

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered 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 Brazil.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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