DeFelsko PosiTector CMM IS

In Situ Concrete Moisture (RH) Meter

PosiTector CMM IS probes and free mobile app guide users through the ASTM F2170 documentation criteria. View and record readings directly with your Apple or Android smart device or PosiTector DPM Advanced gage

  • Easily collect and report relative humidity and temperature in concrete floor slabs in conformance with ASTM F2170
  • No need to open the hole or remove the cap. Probes remain powered on and broadcasting via Bluetooth while in situ for up to three weeks.
  • Combined sleeve and probe design simplifies the installation process and does not require consumables
  • Reusable Smart Probes
  • Fast response precision sensors provide accurate, repeatable readings
  • Certificate of Calibration showing traceability to NIST included (Long Form)


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DeFelsko PosiTector CMM IS In Situ Concrete Moisture (RH) Meter: 3 Models Available
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Basic Kit Complete Kit Pro Kit
DeFelsko CMM IS KIT B PosiTector
In Situ Concrete Moisture
DeFelsko CMM IS KIT C PosiTector
In Situ Concrete Moisture
DeFelsko CMM IS KIT P3-E PosiTector
In Situ Concrete Moisture
INCLUDES INCLUDES INCLUDES
--- --- PosiTector DPM3 Advanced
3 CMM IS probes 5 CMM IS probes 5 CMM IS probes
3 Saturated Salt Solutions 5 Saturated Salt Solutions 5 Saturated Salt Solutions
3 Calibration Check Chambers 5 Calibration Check Chambers 5 Calibration Check Chambers
3 Caps 5 Caps 5 Caps
Extraction Tool
Extraction Tool
Extraction Tool
Tape Measure Tape Measure Tape Measure
--- Vacuum Tool Attachments Vacuum Tool Attachments
Ten A-76 / LR-44 coin cell batteries Ten A-76 / LR-44 coin cell batteries Ten A-76 / LR-44 coin cell batteries
--- Hard shell carrying case Hard shell carrying case


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DeFelsko PosiTector CMM IS In Situ Concrete Moisture (RH) Meter: 3 Expansion Packs
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Expansion
Packs

DeFelsko 1 Pack
CMM IS 1PK PosiTector
In Situ Concrete Moisture

DeFelsko 4 Pack
CMM IS 4PK PosiTector
In Situ Concrete Moisture
DeFelsko 16 Pack
CMM IS 16PK PosiTector
In Situ Concrete Moisture
Add additional probes as required 1 CMM IS probe 4 CMM IS probes 16 CMM IS probes
1 Saturated Salt Solution 4 Saturated Salt Solutions 16 Saturated Salt Solutions
1 Calibration Check Chamber 4 Calibration Check Chambers 16 Calibration Check Chambers
1 Cap 4 Caps 16 Caps
2 coin cell batteries 10 coin cell batteries 40 coin cell batteries


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DeFelsko PosiTector CMM IS In Situ Concrete Moisture (RH) Meter Videos
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PosiSoft Suite of Software
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Four FREE and unique ways to view and report your PosiTector and PosiTest data. Learn More

  • PosiSoft Desktop
  • PosiSoft.net
  • PosiTector App
  • PosiSoft USB


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Accessories for DeFelsko Inspection Instruments - Online Catalog


F.A.Q.

Why test for moisture in concrete floor slabs?

When mixing concrete, water must be added to create a workable mix, and to allow the cement to hydrate and cure. After hardening, much of this water remains as moisture within the porous concrete slab. Over the following months, this moisture is slowly emitted from the concrete until it eventually equalizes with the surrounding moisture levels.

When applying flooring materials or coatings to concrete, it is critical to ensure that the moisture level inside the concrete has decreased to acceptable levels. If not, moisture can accumulate below the flooring or coating, causing discoloration, cupping, buckling, blistering, adhesive failure, and mold growth. Flooring manufacturers recommend testing concrete moisture levels to verify RH readings are within proper tolerance, before installing a floor system.

ASTM F2170 - Standard Test Method for Determining Relative Humidity on Concrete Floor Slabs Using in situ Probes

What is an in situ concrete moisture meter?

As specified in ASTM F2170, in situ concrete moisture meter probes are placed within drilled holes in the concrete. The in situ probe can then measure the relative humidity (RH) and temperature within the concrete floor. In-situ probes directly measure the actual moisture conditions within the concrete using precision digital sensors-regardless of mix, aggregate types, floor thickness, or surface conditions. Potential sources of error are minimized compared to other methods, and in-situ sensors can be calibrated with traceability to national standards.

Several alternate technologies exist for measuring concrete moisture, each with limitations:

Non-destructive electronic concrete moisture meters measure the electrical impedance of the concrete, which is related to moisture levels. However, these meters can be affected by other factors such as variations in concrete composition, and the presence of reinforcing materials. ASTM recommends that these instruments be used as a comparator, and not for determining absolute moisture content.

The anhydrous calcium chloride concrete moisture test involves measuring the increase in weight of salt as it collects moisture from an encapsulated area of the concrete surface. However, significant doubts concerning the accuracy of this test have arisen. There is no practical way to calibrate these kits, they measure moisture only on the surface of the concrete, and they are heavily influenced by ambient conditions.

How do I view my PosiTector CMM IS readings?

PosiTector CMM IS probes communicate wirelessly via Bluetooth with either thePosiTector App (iOS/Android) or PosiTector DPM Advanced instruments.

Both solutions offer the ability to wirelessly view and store readings from PosiTector CMM IS probes.

  • The PosiTector app has a custom interface for taking measurements in accordance with ASTM F2170, and allows users to import a PDF blueprint or image and overlay hole/probe locations. The date and time of all measurement steps can also be recorded. A custom PDF report including all data and metadata required by ASTM can be generated at the touch of a button.
  • PosiTector DPM Advanced instruments display the relative humidity (RH) of the concrete slab and temperature measurements fromPosiTector CMM IS probes alongside the ambient temperature and relative humidity (RH) measurements from the connected PosiTector DPM probe. Easily store datasets into memory for later reporting with the PosiSoft suite of software.

How is the PosiTector CMM IS different than other in situ instruments?

The PosiTector CMM IS has numerous advantages over competitive in situ concrete moisture measurement solutions. Two of the largest innovations are the unique combined sleeve/probe design and being truly wireless; using Bluetooth communication:

  • A combined sleeve and probe design makes PosiTector CMM IS probes easier to install. Requires no consumables. Easily remove probes from the hole using the extraction tool.
  • Wireless Bluetooth 4.0 communication allows measurements to be taken without the need for a reader device, and without having to open the hole. Quick-pairing Bluetooth Smart technology allows for faster, easier inspections.

How should I store the PosiTector CMM IS probes when not in use?

DeFelsko recommends storing the PosiTector CMM IS probes in the Calibration Check Chamber when not in use. The Calibration Check Chamber and Saturated Salt Solution are designed in accordance with ASTM E104 to maintain a constant relative humidity environment of 75.3% @ 25° C, allowing quick verification of accuracy before use in accordance with ASTM F2170.

Does temperature affect relative humidity readings within the Calibration Check Chamber?

Yes. The Calibration Check Chamber and Saturated Salt Solution were designed to maintain a constant relative humidity (RH) of 75.3% @ 25°C. Relative Humidity (RH) variation due to temperature fluctuation for the Calibration Check Chamber is shown in table 1. When verifying accuracy of PosiTector CMM IS probes, it is important to maintain a constant temperature within the chamber for 24 hours prior to measurement.

How long do the batteries typically last?

A typical battery will continuously power the probe for up to 3 weeks. The battery should be removed when not in use.

How are the PosiTector CMM IS probes calibrated at DeFelsko?

Each PosiTector CMM IS probe is calibrated against known conditions using NIST traceable equipment. A Long Form Certificate of Calibration containing actual measured values is included with each probe.

How long is the warranty on the PosiTector CMM IS probe?

DeFelsko Corporation's standard 2 year warranty applies.

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.

Find the following helpful videos and articles to better understand concrete moisture measurement with in-situ probes or concrete moisture meters.


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