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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Pinless Moisture Meter

Product ID: 29722681

Details

Battery Description
Alkaline
Brand
General Tools
Color
White
Item Weight
5.44 ounces
Product Dimensions
2.8"W x 6.3"H

📊3-color LED bar graph & audible alerts

📏3/4" deep non-invasive sensing

🔋Low battery & out-of-range alarms

€ 95.52

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Measure smarter, protect better—never miss a moisture threat!

PINLESS PRECISION - Non-invasive moisture detection up to 3/4" deep protects your surfaces while delivering accurate readings.
ERGONOMIC READABLE - Backlit 2" LCD digits and a comfortable grip make long inspections effortless and precise.
INSTANT VISUAL ALERTS - 3-color LED bar graph and audible alerts keep you informed at a glance—no guesswork needed.
MOLD PREVENTION POWER - Early detection with out-of-range alarms helps you stop mold before it starts—protect your home and health.
MULTI MATERIAL MASTERY - Tailored settings for drywall, masonry, softwood, and hardwood ensure pinpoint accuracy across projects.

The General Tools MM8 Pinless Moisture Meter offers non-invasive, deep moisture detection up to 3/4" in wood and building materials. Featuring a bright backlit LCD, 3-color LED alerts, and ergonomic design, it provides precise readings for drywall, masonry, softwood, and hardwood. With out-of-range and low battery alarms, this tool empowers professionals and DIYers to prevent mold and water damage efficiently.

Specifications

ASIN	B01BLXVDFA
Battery Description	Alkaline
Best Sellers Rank	#495 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Moisture Meters
Brand Name	General Tools
Color	White
Customer Reviews	4.4 4.4 out of 5 stars (892)
Global Trade Identification Number	00681035017340
Included Components	Console^Battery (1)
Item Dimensions W x H	2.8"W x 6.3"H
Item Type Name	---
Item Weight	5.44 ounces
LowerTemperature Range	32 °F
Manufacturer	General Tools
Model	MM8
Mounting Type	Surface Mount
Number of Items	1
Operating Humidity	5% to 95%
Part Number	MM8
UPC	735090905002 681035017340
Unit Count	1 Count
Upper Temperature Range	104 °F
Voltage	9 volts

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 95.52

Duties & taxes included

In stock

Sold byAmazon BelgiumDelivered 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 Belgium.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Customer service was outstanding when I had questions about the product.

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