C555 Handheld Concrete Moisture Meter Kit with Backlight

(6 customer reviews)

From USD $475.00

• Handheld concrete moisture meter
• Measures to 0.5” depth
• Relative mode for other concrete-similar materials
• A scuff-resistant Teflon sensor pad
• Now with backlit screen


C555 Handheld Concrete Moisture Meter Kit

The C555 Concrete Moisture Meter provides fast, non-destructive preliminary moisture measurements on smooth, firm concrete to help pinpoint problem areas and determine where to place Rapid RH® L6 Smart Sensors.

Built-in sensors measure ambient temperature and relative humidity.

The included On-Demand Calibrator allows fast, easy user-calibration. A NIST-traceable version, with a certificate of calibration, can also be purchased.

With its built-in ambient sensors and On-Demand Calibrator, the C555 comes with everything you need to perform the test outlined in ASTM F2659.

Relative mode can be used on other materials such as concrete block.

1-year warranty.

Meter Features:

  • ASTM F2659 compliant
  • Digital backlit display
  • Measures to 0.5-inch depth
  • Integrated ambient temperature and RH sensors
  • Moisture scale reads from 0% to 6.9%
  • Audio threshold alarm
  • Relative mode can be used on other concrete-similar materials such as concrete block
  • Scuff-resistant Teflon sensor pad

Kit Includes:

  • C555 Concrete Moisture Meter
  • Paired On-Demand Calibrator
  • Rubber Protective Boot
  • Foam-lined ABS Plastic Carrying Case
  • 9V Battery
  • Instruction Manual


 C555 Manual
 C555 Manual – Spanish
 Using the C555 with the Rapid RH L6 System


C555 Training Video

Concrete Moisture Meter: Using the C555

Concrete Moisture Meter: How to Calibrate the C555

Making Flooring Professional’s Life Easier [Best Practices]


How does a concrete moisture meter work?
A concrete moisture meter sends a signal from the sensor pad down into the concrete. The meter reports the moisture level based on a capacitance equation calibrated specifically to measure within concrete materials. Concrete moisture meters are non-destructive and do not require drilling or driving pins into the concrete. However, they are not designed to be used to determine the moisture condition of a concrete slab when flooring material will be installed over it. The C555 complies with ASTM F2659 to provide a preliminary evaluation of comparative moisture conditions of concrete, gypsum cement, or other floor slabs and screeds. It can be used to identify pockets of high moisture levels to determine the optimum placement of Rapid RH® L6 Smart Sensors.

When are moisture meters useful for concrete?
The only moisture meters that provide accurate readings of moisture levels in concrete will be labeled “Concrete Moisture Meter.” They are distinguished from other moisture meters by internal circuitry that is calibrated exclusively to read the moisture level in concrete or similar materials by sending an electromagnetic wave field into the concrete and interpreting the capacitance signal received by the sensor pad. A concrete moisture meter that complies fully with ASTM F2659, like Wagner’s C555, can be used to determine higher or lower concentrations of moisture within a concrete slab. Concrete moisture meters should never be used to determine the moisture condition of a concrete slab at the time when flooring materials will be applied.

What is a normal reading on a concrete moisture meter?
Normal is relative when using a concrete moisture meter. Concrete will always feature a variety of mixtures, distinct concentrations of aggregate, and a wide range of water-to-cement ratios. You’re not necessarily looking for a “normal” reading as much as you are comparing the results of multiple readings to get an idea of where the more extreme levels of moisture and dryness reside within a single concrete slab. For flooring installation, ASTM F2659 recognizes compliant concrete moisture meters like Wagner’s C555 as a means to perform a “…preliminary evaluation of the moisture condition of concrete, gypsum cement, or other floor slabs and screeds…” In this capacity, the C555 Concrete Moisture Meter could be used used to determine an average or “mean” moisture content within the concrete slab to assist in determining the optimum location for placement of Rapid RH® L6 Smart Sensors.

6 reviews for C555 Handheld Concrete Moisture Meter Kit with Backlight

  1. Garage Expressions – Jeff B.

    We are a concrete coating company. Mainly garage floor coatings. And checking the moisture in the concrete is vital before selecting our primer coat to ensure permanent adhesion to concrete. Testing for moisture on every floor is vital to the success of our company and the Wagner C555 helps us achieve that.

  2. Coach K, Amazon Customer

    I am an inspector and use it to test the moisture content of concrete slabs mostly. I have used the Tramex meter in the past. This one is more affordable so I took a chance and am happy I did. I actually like the way it works better and the accuracy seems comparable. I would definitely recommend this meter.

  3. Pamela S. Michele, Amazon Customer

    Very simple and easy to use.

  4. Paul J. Pinet, Amazon Customer

    Easy to read.

  5. NICK VEZYROPOULOS, Amazon Customer

    I like how easy it is to use. Amazing

  6. Drew, Amazon Customer

    This is great. Measure the moisture in a concrete slab and it seems very reliable. I am very happy with this purchase and it’s a great value compared to other meters on the market

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