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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Description

🔍 Detect moisture like a pro—no pins, no damage, just precision!

DEEP SURFACE INSIGHT - Pinless sensor penetrates up to 19mm without damage
DAMAGE FREE DETECTION - Non-invasive design protects your walls and surfaces from scratches
MOLD PREVENTION POWER - Early moisture alerts help you stop mold before it starts
INSTANT VISUAL FEEDBACK - Backlit LCD and tricolor LED bar graph for quick, clear readings
SMART ALERTS AUTO CALIBRATE - Audible alarms and auto-calibration keep measurements precise and hassle-free

The General Tools Digital Moisture Meter MMD7NP offers a pinless, non-invasive way to measure moisture levels up to 3/4" deep with a broad range suitable for wood, drywall, and masonry. Featuring a backlit LCD, tricolor LED bar graph, audible alerts, and auto-calibration, it ensures fast, accurate readings while protecting surfaces from damage. Ideal for early mold detection and moisture remediation, this lightweight, battery-powered tool is a must-have for professionals and DIYers aiming to safeguard their spaces.

Specifications

Manufacturer	General Tools Mfg Co In
Part number	MMD7NP
Item Weight	113 g
Product Dimensions	2.87 x 7.62 x 16.51 cm; 113.4 g
Batteries	1 9V batteries required. (included)
Item model number	MMD7NP
Size	Pinless
Color	multi
Style	Digital LCD with Tricolor Bar Graph, Pinless
Material	other
Pattern	Detector
Power source type	Battery Powered
Voltage	9 Volts
Item Package Quantity	1
Number of Handles	1
Plug Profile	Wall Mount
Included components	.....
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline
tech_spec_battery_description_toys	9 volt battery

Reviews

A**D

غير عملي عندما اضعه على اي جدار في الحمام يعطي نفس النتيجة ولايوضح اين مكان التسرب

طلبت هذا المنتج لكشف تسرب المياه ولكن لم استفد منهلهذا الغرض وكان عندي تسرب في احد الحمامات وحاولت بهذا الجهاز كشف موقع التسرب ولكن بدون نتيجة

21.12.2020

A**F

🤩🤩🤩🤩

Awesome

16.05.2025

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