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 MMD7NP Moisture Meter, Pinless, Digital LCD with Tricolor Bar Graph

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

Product ID: 148753909

Details

Battery Description
9V battery
Brand
General Tools
Item Weight
113 g
Number of Items
1
Voltage
9 Volts

🌈Tricolor LED bar graph for instant visual alerts

📏3/4 inch deep moisture detection

🔋9V battery powered for reliable use

₹ 11605

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Description

🌟 Detect moisture like a pro—no pins, no guesswork, just confidence.

READY TO GO - Includes 9V battery and auto power-off to keep you efficient on every job site.
DEEP DETECTION - Reads moisture up to 3/4 inch deep in wood, drywall, and masonry for thorough inspections.
PINLESS PRECISION - Protect your surfaces—no pinholes, no damage, just accurate moisture readings.
USER FRIENDLY DISPLAY - Backlit 2-inch LCD with auto-calibration and hold function for effortless, precise readings.
VISUAL AUDIBLE ALERTS - Tricolor LED and high-pitch tones pinpoint moisture hotspots fast—never miss a leak.

The General Tools MMD7NP is a pinless digital moisture meter featuring a backlit LCD and tricolor LED bar graph for quick, accurate moisture detection up to 3/4 inch deep in various building materials. Powered by a 9V battery, it offers visual and audible alerts, auto-calibration, and a hold function, making it an essential tool for professionals seeking damage-free, reliable moisture measurement.

Specifications

ASIN	B00HARYVUQ
Battery Description	9V battery
Best Sellers Rank	#146,872 in Home Improvement ( See Top 100 in Home Improvement ) #157 in Moisture Meters
Brand Name	General Tools
Country of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (4,039)
Global Trade Identification Number	00681035015834
Importer Contact Information	ATM RETAIL 1st Floor Beside P and T Building Lakdi Ka Pul Hyderabad Telangana 500004
Item Weight	113 g
Manufacturer	General Tools
Model Number	MMD7NP
Number of Items	1
Number of Packs	1
Packer Contact Information	MVS Global, O-197 Sector-1, DSIIDC, Bawana, Delhi-110039, Tel-9312267811, [email protected]
Part Number	MMD7NP
UPC	021113026145 681035015834 753248093142 031113198551 080000324931 044905098113 069060295955 971485411967 079531646414
Unit Count	1 Count
Voltage	9 Volts
Warranty Description	no warranty available

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₹ 11605

Duties & taxes included

In stock

Sold byAmazon IndiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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