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PosiTest® CMM

Concrete Moisture Meter non-destructively measures the moisture content of concrete in accordance with ASTM F2659

The PosiTest CMM Concrete Moisture Meter is the fast, non-destructive impedance meter ideal for inspectors looking to quickly evaluate the moisture condition in concrete slabs.

  • Easy-to-read digital display takes the guesswork out of analog scales
  • Storage of 200 readings—stored readings can be viewed or downloaded
  • Innovative Hold Max and Save Mode waits for the reading to stabilize, then automatically saves it into memory
  • Built-in threaded mounting point for the optional Telescopic Extender to ergonomically measure without bending or kneeling
  • Weatherproof, dustproof, and water-resistant—IP65-rated enclosure
Conforms to ASTM F2659

Features

Simple

  • Easily collect and report measurements
  • Ergonomic and lightweight design with durable rubberized grip for comfortable all day inspection
  • Easy-to-read digital display takes the guesswork out of analog scales
  • Instant measurements with no drilling required
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Versatile

  • Three measurement modes:
    –Continuous Mode constantly updates the display
    —Hold Max Mode displays the maximum reading until saved or reset
    —Hold Max and Save Mode waits for the reading to stabilize, then automatically saves it into memory
  • Three available measurement scales:
    —Moisture Content of Concrete
    —Carbide Method Equivalent
    —Relative
  • Built-in 1/4"–20 threaded mounting point for the optional Telescopic Extender

Durable

  • Weatherproof, dustproof, and water-resistant—IP65-rated enclosure
  • Nylon carrying case with shoulder strap included
  • Two year warranty

Powerful

  • Storage of 200 readings—stored readings can be viewed or downloaded
  • Includes free PosiSoft Desktop software for analyzing and reporting data
  • USB port for fast, simple connection to a PC or Mac
  • Automatically generate custom, professional PDF reports

Accurate

  • Conforms to ASTM F2659
  • Fast response precision sensors provide instant readings
  • Spring loaded sensor pins provide enhanced contact on uneven concrete
  • Includes Check Standard to verify operation
  • Calibrated with concrete standards measured gravimetrically. Test Certificate included.

Specifications

Measurement Scales
0 to 6% Moisture Content of Concrete*
0 to 4% Carbide Method Equivalent
0 to 100 Relative
Accuracy
± 0.5% Moisture Content of Concrete
Depth of Penetration
~20 mm
~0.75”
Temperature Range
5° to 40° C
40° to 105° F
IP Rating
65 (dust and water jet resistance)
Memory
200 readings
Power
2 AAA Alkaline Batteries
* This scale is calibrated using the gravimetric method (percentage of dry weight).

Kit Details

Photo of the PosiTest CMM kit: PosiTest CMM, Check Standard, instruction booklet, Test Certficate, USB cable, should strap carrying bag.
PosiTest CMM
CMM
Includes
PosiTest CMM,
two AAA batteries,
instructions,
check standard,
test certificate,
USB cable,
nylon carrying case with shoulder strap,
two year warranty
View PDFAdd to Instant Quote
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In Stock
Same-day shipping if ordered by 2PM EST

Videos

Video Thumbnail
How to Measure Concrete Moisture using the PosiTest CMM Non-Destructive Concrete Moisture Meter

Software

PosiSoft Desktop

Powerful desktop software for downloading, viewing, printing, and storing measurement data. No internet connection required.

  • Simple, intuitive user interface
  • Import readings directly from the meter via USB or from legacy PosiSoft desktop versions
  • Synchronize measurement data including readings, notes, and pictures to and from PosiSoft.net
Learn More
Image of a laptop with PosiSoft Desktop on the screen

PosiSoft Custom PDF Report Generator

Easily create reports from your measurement data in seconds
  • Generate custom, professional PDF reports
  • Include inspection information such as on-site pictures, screen captures, notes, and more to communicate important details
  • Create and save multiple custom layouts as templates – insert cover pages, add logos/images, and select font and point size
  • Select the information to include for each product type – charts, histograms, readings, time stamps, and more
  • Compile multi-batch reports from one or more probes and instrument types

F.A.Q.

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Is the PosiTest CMM calibrated at the factory?

The PosiTest CMM arrives fully calibrated and ready to measure. A Test Certificate is included, which documents actual readings taken by your instrument at our calibration laboratory on concrete blocks with the moisture content determined gravimetrically (percentage of dry weight) as described in ASTM F2659.

Beware of ‘Certificates’ or ‘Certificates of Conformance’ offered by competitors. These typically do not include actual instrument readings, and are often insufficient to meet common quality requirements.

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How does the PosiTest CMM differ from the PosiTector CMM IS?

The PosiTector CMM IS measures concrete moisture as described in the ASTM F2170 test Method. It involves drilling a hole into the concrete (generally 40% of the depth of the slab), and using an electronic relative humidity probe to quantitatively measure the moisture directly in the slab. It is a destructive test that requires at least 24 hours of being in-situ before an acceptable reading is taken.

The PosiTest CMM measures concrete moisture as described in the ASTM F2659 test method using a non-destructive electronic impedance meter to instantaneously measure comparative moisture content within the top ¾” of a concrete slab.

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Why is concrete moisture measurement important?

Before applying a protective coating or other flooring materials to a concrete slab, it is critical to ensure that the moisture level inside the concrete has decreased to acceptable levels—typically ≤75% Relative Humidity (RH), 3 lb/1000 ft2/24 hours MVER, or ≤5% Moisture Content (MC).

If not, moisture can accumulate below the coating or flooring causing discoloration, cupping, buckling, blistering, adhesive failure, and/or mold growth. There are various methods used for concrete moisture measurement. One common method to determine the moisture condition of a concrete slab uses a non-destructive electronic impedance meter, such as the PosiTest CMM—as described in ASTM F2659.

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How many readings can the PosiTest CMM store into memory?

The PosiTest CMM is capable of storing up to 200 readings into memory. It features a USB port and includes a USB cable to download, view, and print stored readings quickly and easily with PosiSoft Desktop.

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What information does the PosiTest CMM store into memory?

The PosiTest CMM Concrete Moisture Meter stores each saved reading with the reading number—in all three available units (concrete 0-6%, carbide 0-4%, and relative).

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What are the different measurement scales available for the PosiTest CMM?

The PosiTest CMM features three different measurement scales:

• Concrete 0 to 6%: This scale is calibrated using the gravimetric method (percent dry weight).

• Carbide Method 0 to 4%: This scale is equivalent to the carbide method.

• Relative 0 to 100: Used for taking readings for reference comparisons. This scale does not indicate moisture content or humidity.

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What are the different measurement modes available for the PosiTest CMM?

The PosiTest CMM features three different measurement modes:

Continuous Measurement Mode is the default mode and continuously updates the display with the current measurement value.

Hold Max Mode displays and holds the maximum reading until the memory button is pressed to save it, or the power button is pressed to discard it.

• The innovative Hold Max and Save Mode waits for the reading to stabilize, then automatically saves it into memory.

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How long do the batteries last in the PosiTest CMM?

The PosiTest CMM uses two AAA batteries. Typically, operation life extends to 30 hours—ideal for all day use.

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How is the PosiTest CMM checked for accurate operation?

The PosiTest CMM includes a Check Standard to verify the meter’s operation and accuracy. The PosiTest CMM is placed onto the Check Standard and the reading is checked against the range written on the standard.

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Is reporting software available for the PosiTest CMM?

Yes. The PosiTest CMM’s readings can be downloaded, viewed, and printed quickly and easily with PosiSoft Desktop, a free download.

Fully customizable reports can be created to match existing paper forms or layouts. If other DeFelsko instruments such as the PosiTector CMM IS, PosiTector 200, or PosiTector DPM are used on the same job, measurement data can easily be compiled into one report.

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How often should the PosiTest CMM be recertified?

PosiTest CMM Concrete Moisture Meters include a Test Certificate with no expiry or end date. They have no shelf life, therefore the length of time in the field is not a good indicator for recertification intervals. Many organizations with quality programs and recertification programs require annual recertifications, and this is a good starting point for most users. DeFelsko recommends that customers establish recertification intervals based upon their own experience and work environment. Based on our product knowledge, data, and customer feedback, a one year recertification interval from the date the instrument was placed in service is a good starting point.

Accessories

Telescopic ExtenderTelescopic Extender

This lightweight device increases the utility of the PosiTest CMM allowing for quick and easy concrete moisture measurements on large surfaces without the need to bend or kneel.

Learn MoreLearn More

Resources

Downloads

Information