does it measure a slump up to 8 inches

That I know of, I've measured 6" accurately.

So, to be perfectly clear, Is this not useful, as a professional home inspector, to detect moisture in concrete block basement walls?

To be clear , as long as the concrete , block ,has no paint , stain , sealer etc on it , this will do the job ... also used it recently on wallboard ( drywall ) my invasive 2 prong meter was misplaced and that didn't matter whether painted/ textured / primed with tramex. Please remember on cement / block / concrete, must not be sealed/painted etc for tramex to work properly

does it work on cinder block foundations

Hi there, these are intended to be used on clean, bare concrete slabs. Any measurements made on painted/adhesive-covered/cinder block etc should be used as comparative (ie "this area is damper than that area") and NOT quantitative (this is x% humidity). I hope this helps!

Can it be used for finding a basement leak behind a finished wall?

Well , as it goes basements are below grade and there is moisture content at various levels anyway ... so you must determine your acceptable reading at the level your concerned with and the answer to your question is yes , up to 6 - 8 “ thick

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Tramex CME4 Tramex Non Destructive Concrete Moisture Meter Encounter 4, Measuring Range: 2-6% H2O

Tramex CME4 Tramex Non Destructive Concrete Moisture Meter Encounter 4, Measuring Range: 2-6% H2O

Product ID: 12446953

Details

Brand
Tramex
Capacity
10 ounces
Item Weight
16 ounces
Item dimensions L x W x H
8.75 x 4.25 x
Material
Plastic

⚡Instant moisture readings up to 6% H2O

🔋Includes 9V battery for immediate use

🛠️Non-destructive testing—no drilling needed

Description

⚡ Know your concrete’s moisture before it’s too late!

VERSATILE RANGE - Measures moisture up to 6% in concrete and comparative 0-10 on gypsum screeds.
INSTANT PRECISION - Get real-time moisture data in seconds to avoid costly flooring failures.
DAMAGE FREE TESTING - Non-invasive technology protects your concrete surfaces—no drilling, no mess.
READY OUT OF THE BOX - Comes with battery, instructions, and a sleek carrying pouch for on-the-go professionals.
TRUSTED INDUSTRY LEADER - Backed by 20+ years of innovation, ensuring reliability for your flooring projects.

The Tramex CME4 Concrete Moisture Meter delivers instant, non-destructive moisture readings up to 6% in concrete and comparative readings on gypsum screeds. Designed for flooring professionals, it includes a 9V battery and carrying pouch, enabling quick, damage-free testing to prevent costly flooring failures. Trusted worldwide for over 20 years, it’s the essential tool for confident floor installation decisions.

Specifications

ASIN	B0083CK9N0
Best Sellers Rank	#1,027,988 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #433 in Moisture Meters
Brand Name	Tramex
Capacity	10 ounces
Customer Reviews	4.4 4.4 out of 5 stars (95)
Item Dimensions	8.75 x 4.25 x 2.25 inches
Item Weight	16 ounces
Manufacturer	Tramex Meters
Manufacturer Part Number	CME4
Material Type	Plastic
Model Number	CME4
UPC	082045098884 745332594437
Unit Count	1.0 Count

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