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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

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

It senses moisture through a painted surface.

Q: Can this be used on concrete and drywall?

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

Q: 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.

Q: 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.

Product ID: 7606462

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Details

Color
multi
Brand
General Tools
Product Dimensions
3"W x 1.13"H
Item Weight
0.25 Pounds
Battery Description
Alkaline

📊3-color LED bar graph

📏±0.1% accuracy

🔋9V battery powered

Description

💧 Stay dry, stay safe — detect moisture before it’s too late!

INSTANT ALERTS - Audible alarms and tricolor LED indicators keep you ahead of mold risks.
PINLESS PRECISION - Non-invasive moisture detection protects surfaces from damage.
ERGONOMIC DURABLE - Rubber grips and compact design ensure comfort during extended use.
DEEP SURFACE INSIGHT - Reads moisture up to 3/4" (19mm) deep for comprehensive analysis.
SMART POWER MANAGEMENT - Auto power-off and low battery alerts maximize reliability on the job.

The General Tools Digital Moisture Meter MMD7NP offers highly accurate, pinless moisture detection with a ±0.1% measurement accuracy. Featuring a 3-color LED bar graph and audible alerts, it reads moisture levels up to 3/4" deep without damaging surfaces. Powered by a 9V battery with smart power-saving features, this ergonomic tool is essential for professionals and DIYers aiming to prevent mold and water damage efficiently.

Specifications

Color	multi
Brand	General Tools
Product Dimensions	3"W x 1.13"H
Item Weight	0.25 Pounds
Battery Description	Alkaline
Lower Temperature Rating	32 Degrees Fahrenheit
Mounting Type	Wall Mount
Operating Humidity	Wide
Upper Temperature Rating	122 Degrees Fahrenheit
Voltage	9 Volts
Temperature Accuracy	±1°C
Manufacturer	General Tools Mfg Co In
UPC	021113026145 681035015834 753248093142 031113198551 080000324931 044905098113 069060295955 971485411967 079531646414
Global Trade Identification Number	00681035015834
Part Number	MMD7NP
Item Weight	4 ounces
Item model number	MMD7NP
Batteries	1 9V batteries required. (included)
Is Discontinued By Manufacturer	No
Size	Pinless
Style	Digital LCD with Tricolor Bar Graph, Pinless
Material	other
Pattern	Detector
Power Source	Battery Powered
Item Package Quantity	1
Number of Handles	1
Measurement Accuracy	+/-0.1%
Included Components	.....
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline
Description Pile	Alkaline

Have a Question? See What Others Asked

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

Can this be used on concrete and 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.

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

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